/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=NARROWEST --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/list-simple/sll2n_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:40:29,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:40:29,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:40:29,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:40:29,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:40:29,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:40:29,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:40:29,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:40:29,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:40:29,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:40:29,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:40:29,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:40:29,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:40:29,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:40:29,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:40:29,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:40:29,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:40:29,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:40:29,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:40:29,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:40:29,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:40:29,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:40:29,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:40:29,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:40:29,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:40:29,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:40:29,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:40:29,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:40:29,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:40:29,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:40:29,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:40:29,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:40:29,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:40:29,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:40:29,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:40:29,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:40:29,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:40:29,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:40:29,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:40:29,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:40:29,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:40:29,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:40:29,702 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:40:29,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:40:29,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:40:29,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:40:29,705 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:40:29,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:40:29,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:40:29,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:40:29,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:40:29,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:40:29,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:40:29,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:40:29,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:40:29,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:40:29,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:40:29,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:40:29,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:40:29,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:40:29,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:40:29,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:40:29,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:40:29,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:40:29,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:40:29,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:40:29,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:40:29,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:40:29,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:40:29,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:40:29,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:40:29,710 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:40:30,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:40:30,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:40:30,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:40:30,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:40:30,105 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:40:30,106 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-13 10:40:30,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7a395f93/1ccb1d954d8d4bb494a1ac96c398addc/FLAG33d84c114 [2020-10-13 10:40:30,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:40:30,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/sll2n_append_equal.i [2020-10-13 10:40:30,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7a395f93/1ccb1d954d8d4bb494a1ac96c398addc/FLAG33d84c114 [2020-10-13 10:40:30,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7a395f93/1ccb1d954d8d4bb494a1ac96c398addc [2020-10-13 10:40:30,989 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:40:30,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:40:30,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:40:30,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:40:30,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:40:30,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:40:30" (1/1) ... [2020-10-13 10:40:31,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a1b381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31, skipping insertion in model container [2020-10-13 10:40:31,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:40:30" (1/1) ... [2020-10-13 10:40:31,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:40:31,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:40:31,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:40:31,641 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:40:31,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:40:31,828 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:40:31,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31 WrapperNode [2020-10-13 10:40:31,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:40:31,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:40:31,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:40:31,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:40:31,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... [2020-10-13 10:40:31,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:40:31,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:40:31,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:40:31,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:40:31,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:40:32,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:40:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:40:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:40:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:40:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:40:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-10-13 10:40:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-13 10:40:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-13 10:40:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2020-10-13 10:40:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:40:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:40:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:40:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:40:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:40:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:40:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:40:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:40:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:40:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:40:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:40:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:40:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:40:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:40:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:40:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:40:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:40:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:40:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:40:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:40:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:40:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:40:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:40:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:40:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:40:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:40:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:40:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:40:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:40:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:40:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:40:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:40:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:40:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:40:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:40:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:40:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:40:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:40:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:40:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:40:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:40:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:40:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:40:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:40:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:40:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:40:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:40:32,057 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:40:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:40:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:40:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:40:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:40:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:40:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:40:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:40:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:40:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:40:32,063 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:40:32,064 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:40:32,065 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:40:32,066 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:40:32,067 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:40:32,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:40:32,069 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-13 10:40:32,069 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-13 10:40:32,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:40:32,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:40:32,069 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2020-10-13 10:40:32,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:40:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:40:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-13 10:40:32,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:40:32,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:40:32,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:40:32,434 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:40:32,645 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:40:32,646 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 10:40:32,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:40:32 BoogieIcfgContainer [2020-10-13 10:40:32,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:40:32,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:40:32,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:40:32,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:40:32,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:40:30" (1/3) ... [2020-10-13 10:40:32,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f40da91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:40:32, skipping insertion in model container [2020-10-13 10:40:32,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:40:31" (2/3) ... [2020-10-13 10:40:32,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f40da91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:40:32, skipping insertion in model container [2020-10-13 10:40:32,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:40:32" (3/3) ... [2020-10-13 10:40:32,659 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2020-10-13 10:40:32,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:40:32,677 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:40:32,690 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:40:32,712 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:40:32,713 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:40:32,713 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:40:32,713 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:40:32,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:40:32,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:40:32,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:40:32,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:40:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-13 10:40:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:40:32,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:32,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:32,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1667158038, now seen corresponding path program 1 times [2020-10-13 10:40:32,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:32,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733062906] [2020-10-13 10:40:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:32,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:33,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:40:33,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:40:33,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-13 10:40:33,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:40:33,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:33,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:40:33,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:33,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:33,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:33,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:33,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:40:33,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:33,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:33,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:33,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:33,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:33,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:33,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:33,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:40:33,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:33,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:40:33,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:33,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:33,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:40:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:33,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:33,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 10:40:33,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:33,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:33,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:33,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:33,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:33,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:33,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:33,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:40:33,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:33,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:33,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:33,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:33,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:40:33,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733062906] [2020-10-13 10:40:33,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:40:33,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:40:33,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640647531] [2020-10-13 10:40:34,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:40:34,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:34,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:40:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:40:34,021 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-10-13 10:40:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:34,267 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-10-13 10:40:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:40:34,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 10:40:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:34,281 INFO L225 Difference]: With dead ends: 96 [2020-10-13 10:40:34,281 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:40:34,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:40:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:40:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 10:40:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:40:34,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 10:40:34,339 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2020-10-13 10:40:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:34,340 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 10:40:34,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:40:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 10:40:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:40:34,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:34,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:34,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:40:34,344 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 937001954, now seen corresponding path program 1 times [2020-10-13 10:40:34,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:34,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592461590] [2020-10-13 10:40:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:34,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:34,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:34,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:40:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:40:34,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-13 10:40:34,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:40:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:34,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:34,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:34,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:34,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:34,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:40:34,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:34,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:34,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:35,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:35,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:35,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:35,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:40:35,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:35,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:40:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:35,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:40:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:35,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:35,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:35,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:35,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 10:40:35,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:35,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:35,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:35,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:35,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:35,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:35,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:40:35,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:35,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:35,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:35,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:40:35,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592461590] [2020-10-13 10:40:35,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:40:35,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:40:35,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725634784] [2020-10-13 10:40:35,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:40:35,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:40:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:40:35,144 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-13 10:40:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:35,438 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-13 10:40:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:40:35,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 10:40:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:35,440 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:40:35,441 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:40:35,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:40:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:40:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 10:40:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:40:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-13 10:40:35,465 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 29 [2020-10-13 10:40:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:35,465 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-13 10:40:35,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:40:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-13 10:40:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:40:35,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:35,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:35,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:40:35,469 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -496897929, now seen corresponding path program 1 times [2020-10-13 10:40:35,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:35,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699977708] [2020-10-13 10:40:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:35,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:35,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:37,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:40:40,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:40:40,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 10:40:40,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:40:40,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:40,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:40,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:40,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:40,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:40:40,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:40,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:40,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:40,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:40:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:40,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-13 10:40:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:40:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:40:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:40,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:40,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:40:40,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:40:40,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:40,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:40,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:40,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:40:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:40,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:40,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:40,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:40:40,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:40:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:40,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:40,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:40,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:40,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:40,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:40,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:40,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:40:40,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:40,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:40,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:40:40,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699977708] [2020-10-13 10:40:40,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:40,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:40:40,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048783705] [2020-10-13 10:40:40,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:40:40,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:40:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:40:40,850 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-10-13 10:40:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:41,189 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-13 10:40:41,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:40:41,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-13 10:40:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:41,191 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:40:41,191 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:40:41,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:40:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:40:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 10:40:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:40:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 10:40:41,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 38 [2020-10-13 10:40:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:41,214 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 10:40:41,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:40:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 10:40:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:40:41,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:41,218 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-13 10:40:41,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:40:41,219 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1152263294, now seen corresponding path program 2 times [2020-10-13 10:40:41,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:41,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765967477] [2020-10-13 10:40:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:41,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:43,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:43,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:40:43,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:40:43,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2623 [2020-10-13 10:40:43,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:40:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:43,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:40:43,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:43,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:43,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:43,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:43,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:43,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:40:43,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:44,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:44,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:44,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:44,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:40:44,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-13 10:40:44,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:40:44,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:44,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:40:44,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:44,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:44,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:44,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:44,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:44,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:40:44,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:44,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:44,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:44,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 10:40:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:44,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:44,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:40:44,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:44,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:40:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-13 10:40:44,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:40:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:40:44,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:44,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:44,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:44,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:44,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:44,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 10:40:44,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:40:44,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:40:44,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:40:44,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765967477] [2020-10-13 10:40:44,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:44,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:40:44,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971773056] [2020-10-13 10:40:44,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:40:44,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:40:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:40:44,825 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 18 states. [2020-10-13 10:40:45,819 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 10:40:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:45,977 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-13 10:40:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:40:45,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-13 10:40:45,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:45,979 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:40:45,980 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:40:45,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:40:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:40:45,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 10:40:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:40:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-13 10:40:45,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 47 [2020-10-13 10:40:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:45,999 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-13 10:40:46,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:40:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-13 10:40:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:40:46,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:46,004 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-13 10:40:46,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:40:46,005 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash 160436039, now seen corresponding path program 1 times [2020-10-13 10:40:46,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:46,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248329545] [2020-10-13 10:40:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:40:48,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:40:48,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2125 [2020-10-13 10:40:48,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:40:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:48,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:40:48,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:48,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:48,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:48,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:48,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:40:48,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:48,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:48,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-13 10:40:48,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:40:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:48,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:40:48,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:48,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:48,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:40:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:48,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:40:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:48,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:48,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:40:48,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:48,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:48,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:48,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:48,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:48,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:40:48,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:40:48,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:40:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:48,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:40:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:49,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:49,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:49,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:49,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:49,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-13 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:40:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:40:49,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248329545] [2020-10-13 10:40:49,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:49,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:40:49,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621604060] [2020-10-13 10:40:49,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:40:49,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:40:49,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:40:49,383 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2020-10-13 10:40:50,695 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 10:40:50,935 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-13 10:40:51,148 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-13 10:40:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:40:51,271 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-13 10:40:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:40:51,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-13 10:40:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:40:51,274 INFO L225 Difference]: With dead ends: 54 [2020-10-13 10:40:51,274 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:40:51,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:40:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:40:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 10:40:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:40:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 10:40:51,297 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 50 [2020-10-13 10:40:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:40:51,298 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 10:40:51,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:40:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 10:40:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:40:51,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:40:51,301 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:40:51,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:40:51,302 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:40:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:40:51,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1720319678, now seen corresponding path program 1 times [2020-10-13 10:40:51,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:40:51,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508672253] [2020-10-13 10:40:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:40:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:40:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:40:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 10:40:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:52,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:40:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:52,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:52,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:40:52,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:52,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:40:52,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:40:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:52,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:40:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:40:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:53,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:53,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:40:53,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:40:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:53,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:53,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:53,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:53,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 10:40:53,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:40:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:40:53,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:40:53,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:40:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:53,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:53,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:53,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:53,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 10:40:53,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:53,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:40:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:40:53,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:40:53,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:53,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:40:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:53,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:53,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:40:53,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-13 10:40:53,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:40:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:40:53,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:54,259 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-13 10:40:54,625 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 10:40:55,376 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 92 [2020-10-13 10:40:57,116 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 185 DAG size of output: 98 [2020-10-13 10:40:57,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:40:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:40:57,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:40:57,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:40:57,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:40:57,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:40:57,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 10:40:57,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:40:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:40:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:40:57,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:40:57,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:40:57,700 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-13 10:40:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:40:57,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508672253] [2020-10-13 10:40:57,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:40:57,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:40:57,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067140273] [2020-10-13 10:40:57,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:40:57,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:40:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:40:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:40:57,742 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 27 states. [2020-10-13 10:40:59,513 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-13 10:40:59,928 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-13 10:41:00,353 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-13 10:41:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:01,003 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-13 10:41:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:41:01,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-13 10:41:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:01,005 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:41:01,006 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 10:41:01,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:41:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 10:41:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-10-13 10:41:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:41:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-13 10:41:01,024 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 52 [2020-10-13 10:41:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:01,025 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-13 10:41:01,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:41:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-13 10:41:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:41:01,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:01,027 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:01,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:41:01,027 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1720321352, now seen corresponding path program 1 times [2020-10-13 10:41:01,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:01,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329167945] [2020-10-13 10:41:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:01,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:01,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:02,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:03,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:03,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:41:06,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:41:06,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:41:06,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:41:06,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:41:06,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:41:06,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:06,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:06,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:06,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:06,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:06,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:41:06,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:06,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:06,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:06,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:41:06,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:06,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:41:06,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:41:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-13 10:41:06,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:41:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:41:06,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:06,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:06,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:06,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:06,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:06,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:41:06,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:41:06,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:06,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:06,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:41:06,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329167945] [2020-10-13 10:41:06,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:06,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:41:06,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829300538] [2020-10-13 10:41:06,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:41:06,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:41:06,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:41:06,744 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-10-13 10:41:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:07,175 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-13 10:41:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:41:07,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 10:41:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:07,179 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:41:07,179 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:41:07,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:41:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:41:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-13 10:41:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:41:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 10:41:07,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 52 [2020-10-13 10:41:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:07,193 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 10:41:07,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:41:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 10:41:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:41:07,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:07,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-13 10:41:07,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:41:07,198 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash 335244765, now seen corresponding path program 1 times [2020-10-13 10:41:07,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:07,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590526774] [2020-10-13 10:41:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:07,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:07,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:09,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:41:09,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:41:09,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1967 [2020-10-13 10:41:09,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:41:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:41:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:09,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:09,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:09,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:09,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:09,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:09,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:09,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-13 10:41:09,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:41:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:09,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:41:09,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:09,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:09,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:09,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:09,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:09,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:41:09,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:09,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:41:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:09,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:09,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:09,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:09,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:09,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:41:09,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:09,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:41:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:09,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:09,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:10,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:10,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:10,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:10,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:10,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 10:41:10,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:41:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:10,827 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 10:41:11,050 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-13 10:41:11,360 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-13 10:41:11,741 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-13 10:41:11,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:11,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:11,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:11,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:11,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:12,325 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2020-10-13 10:41:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:12,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590526774] [2020-10-13 10:41:12,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:12,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:41:12,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317381443] [2020-10-13 10:41:12,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:41:12,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:41:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:41:12,363 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 28 states. [2020-10-13 10:41:13,534 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-13 10:41:14,699 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-13 10:41:15,106 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-10-13 10:41:15,538 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-13 10:41:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:16,205 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-13 10:41:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:41:16,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-10-13 10:41:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:16,208 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:41:16,209 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:41:16,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:41:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:41:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 10:41:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:41:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-13 10:41:16,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 54 [2020-10-13 10:41:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:16,222 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-13 10:41:16,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:41:16,223 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-13 10:41:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:41:16,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:16,224 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:16,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:41:16,224 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:16,225 INFO L82 PathProgramCache]: Analyzing trace with hash 335243091, now seen corresponding path program 1 times [2020-10-13 10:41:16,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:16,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41786819] [2020-10-13 10:41:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:16,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:16,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:16,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:20,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:20,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:41:21,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:41:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:41:21,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:41:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:41:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:21,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:21,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:21,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:21,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:21,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:21,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:21,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:21,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:21,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:41:21,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:21,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:21,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:21,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:21,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:21,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:21,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:41:21,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:21,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:21,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:21,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:21,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:21,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:21,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:21,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:21,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 10:41:21,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:41:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:41:21,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:22,151 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-10-13 10:41:22,595 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-10-13 10:41:22,928 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 77 [2020-10-13 10:41:22,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:22,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:22,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:22,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:41:22,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41786819] [2020-10-13 10:41:22,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:22,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:41:22,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697881543] [2020-10-13 10:41:22,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:41:22,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:41:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:41:22,988 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 16 states. [2020-10-13 10:41:23,732 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-13 10:41:24,062 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-10-13 10:41:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:24,395 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-13 10:41:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:41:24,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-13 10:41:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:24,397 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:41:24,397 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:41:24,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:41:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:41:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 10:41:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:41:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 10:41:24,414 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 54 [2020-10-13 10:41:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:24,415 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 10:41:24,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:41:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 10:41:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:41:24,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:24,417 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:41:24,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:41:24,417 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash -945332099, now seen corresponding path program 2 times [2020-10-13 10:41:24,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:24,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932445884] [2020-10-13 10:41:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:24,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:41:25,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:41:25,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:25,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:25,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:25,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 10:41:26,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:41:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:26,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:41:26,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:26,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:26,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:41:26,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:41:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:41:26,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:26,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 10:41:26,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:41:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:26,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:26,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:26,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:26,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:26,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:41:26,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 10:41:26,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:41:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:26,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:41:26,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:27,340 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-13 10:41:27,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:41:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:27,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:41:27,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:27,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:41:27,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:27,928 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-13 10:41:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:41:27,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932445884] [2020-10-13 10:41:27,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:41:27,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:41:27,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140896246] [2020-10-13 10:41:27,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:41:27,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:41:27,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:41:27,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:41:27,952 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 25 states. [2020-10-13 10:41:28,668 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-13 10:41:29,437 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 10:41:29,786 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-13 10:41:30,113 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-13 10:41:30,539 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2020-10-13 10:41:30,877 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-13 10:41:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:41:31,206 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 10:41:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:41:31,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-13 10:41:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:41:31,209 INFO L225 Difference]: With dead ends: 72 [2020-10-13 10:41:31,209 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:41:31,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:41:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:41:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 10:41:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:41:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-13 10:41:31,223 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 54 [2020-10-13 10:41:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:41:31,223 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-13 10:41:31,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:41:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-13 10:41:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:41:31,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:41:31,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-13 10:41:31,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:41:31,225 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:41:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:41:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash 47718328, now seen corresponding path program 2 times [2020-10-13 10:41:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:41:31,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102856695] [2020-10-13 10:41:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:41:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:31,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:33,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:33,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:41:33,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2727 [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:41:33,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:34,407 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2020-10-13 10:41:34,632 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-13 10:41:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:41:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:41:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:34,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:41:34,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:34,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:41:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:34,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:41:35,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:41:35,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:41:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:35,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:41:35,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:41:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:35,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:41:35,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:41:35,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:35,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:41:35,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:35,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:41:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:35,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:41:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:35,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:41:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:41:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:41:35,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:41:35,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:41:40,979 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 265 DAG size of output: 77 [2020-10-13 10:41:44,008 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 268 DAG size of output: 88 [2020-10-13 10:41:54,799 WARN L193 SmtUtils]: Spent 9.97 s on a formula simplification. DAG size of input: 421 DAG size of output: 159 [2020-10-13 10:42:08,809 WARN L193 SmtUtils]: Spent 12.43 s on a formula simplification. DAG size of input: 550 DAG size of output: 239 [2020-10-13 10:42:18,225 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 357 DAG size of output: 187 [2020-10-13 10:42:18,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:18,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:42:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 10:42:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:42:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:19,483 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 72 [2020-10-13 10:42:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:42:20,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102856695] [2020-10-13 10:42:20,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:20,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:42:20,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663392725] [2020-10-13 10:42:20,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:42:20,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:42:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:42:20,031 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 27 states. [2020-10-13 10:42:21,017 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-13 10:42:23,650 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-13 10:42:23,924 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-13 10:42:24,204 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 10:42:24,461 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-13 10:42:25,346 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2020-10-13 10:42:25,780 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 10:42:26,101 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 10:42:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:26,106 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 10:42:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:42:26,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-13 10:42:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:26,108 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:42:26,108 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:42:26,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 10:42:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:42:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-10-13 10:42:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:42:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-10-13 10:42:26,120 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 56 [2020-10-13 10:42:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:26,121 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-10-13 10:42:26,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:42:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-10-13 10:42:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:42:26,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:26,122 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:26,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:42:26,122 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash 47716654, now seen corresponding path program 2 times [2020-10-13 10:42:26,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:26,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956199231] [2020-10-13 10:42:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:26,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:27,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3567 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:42:29,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:29,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:29,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:29,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:29,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:42:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:29,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:29,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:29,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:29,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:29,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-13 10:42:29,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:29,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:42:29,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:29,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:42:29,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:30,316 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-13 10:42:30,498 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-13 10:42:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:30,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:30,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:30,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:30,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:30,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:42:30,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956199231] [2020-10-13 10:42:30,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:30,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:42:30,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751457845] [2020-10-13 10:42:30,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:42:30,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:30,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:42:30,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:42:30,791 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 20 states. [2020-10-13 10:42:31,398 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-13 10:42:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:31,833 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-13 10:42:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:42:31,834 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-10-13 10:42:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:31,835 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:42:31,835 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:42:31,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:42:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:42:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-13 10:42:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:42:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-10-13 10:42:31,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 56 [2020-10-13 10:42:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:31,851 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-10-13 10:42:31,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:42:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-10-13 10:42:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:42:31,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:31,852 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:31,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:42:31,852 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1387280685, now seen corresponding path program 3 times [2020-10-13 10:42:31,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:31,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003979179] [2020-10-13 10:42:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:32,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:36,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 10:42:36,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:37,169 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-13 10:42:37,287 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-13 10:42:37,416 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 10:42:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:37,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:37,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:37,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:37,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:37,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:37,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:37,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:37,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:37,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:37,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:37,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:37,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:37,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:37,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:37,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:37,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:37,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:37,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:37,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:37,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:37,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:37,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:37,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:42:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:37,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:37,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:37,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:42:37,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:42:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:42:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:38,492 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-13 10:42:40,088 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 251 DAG size of output: 48 [2020-10-13 10:42:40,308 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-13 10:42:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:40,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:40,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:40,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:42:40,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003979179] [2020-10-13 10:42:40,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:40,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:42:40,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247446890] [2020-10-13 10:42:40,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:42:40,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:42:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:42:40,396 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 20 states. [2020-10-13 10:42:41,358 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 10:42:41,724 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:42:41,918 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-13 10:42:42,120 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 10:42:42,739 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-13 10:42:42,928 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-13 10:42:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:43,062 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-13 10:42:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:42:43,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-10-13 10:42:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:43,064 INFO L225 Difference]: With dead ends: 82 [2020-10-13 10:42:43,064 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:42:43,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:42:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:42:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-10-13 10:42:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:42:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-10-13 10:42:43,077 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 58 [2020-10-13 10:42:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:43,077 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-10-13 10:42:43,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:42:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-10-13 10:42:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:42:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:43,078 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:43,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:42:43,079 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1387282359, now seen corresponding path program 3 times [2020-10-13 10:42:43,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:43,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966037107] [2020-10-13 10:42:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:42:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:43,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:43,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:42:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:42:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:43,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:43,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:43,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:42:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:42:43,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:43,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:43,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:43,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:43,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:43,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:43,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:42:43,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966037107] [2020-10-13 10:42:43,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:43,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:42:43,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093862737] [2020-10-13 10:42:43,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:42:43,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:42:43,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:42:43,854 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 14 states. [2020-10-13 10:42:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:44,613 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-13 10:42:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:42:44,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-13 10:42:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:44,616 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:42:44,617 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:42:44,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:42:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:42:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-13 10:42:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 10:42:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-10-13 10:42:44,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 58 [2020-10-13 10:42:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:44,643 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-10-13 10:42:44,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:42:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-10-13 10:42:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:42:44,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:44,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:44,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:42:44,647 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:44,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1219351944, now seen corresponding path program 3 times [2020-10-13 10:42:44,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:44,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008994051] [2020-10-13 10:42:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:44,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1990 [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:42:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:42:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:46,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:46,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:42:46,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:46,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:46,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:42:46,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:46,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:46,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:42:46,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-13 10:42:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:46,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:42:46,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:46,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:46,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:42:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:42:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:42:46,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:42:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:46,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:46,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:46,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:46,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 10:42:46,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008994051] [2020-10-13 10:42:46,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:46,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:42:46,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389910930] [2020-10-13 10:42:46,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:42:46,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:42:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:42:46,937 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 9 states. [2020-10-13 10:42:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:47,256 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-13 10:42:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:42:47,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-13 10:42:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:47,258 INFO L225 Difference]: With dead ends: 109 [2020-10-13 10:42:47,258 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:42:47,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:42:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:42:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 10:42:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:42:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 10:42:47,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 63 [2020-10-13 10:42:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:47,281 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 10:42:47,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:42:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 10:42:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:42:47,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:47,282 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:47,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:42:47,283 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1736830162, now seen corresponding path program 4 times [2020-10-13 10:42:47,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:47,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721796890] [2020-10-13 10:42:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:47,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:52,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:52,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:42:52,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:42:52,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:53,254 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 58 [2020-10-13 10:42:53,611 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-13 10:42:54,007 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-13 10:42:54,470 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-13 10:42:54,707 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-10-13 10:42:55,068 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2020-10-13 10:42:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:42:55,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:55,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:42:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:42:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:42:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:55,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:55,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:55,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:42:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:55,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-13 10:42:55,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:42:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:42:55,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:56,899 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 176 DAG size of output: 51 [2020-10-13 10:42:57,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:42:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:42:57,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:42:57,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:57,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:42:57,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721796890] [2020-10-13 10:42:57,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:42:57,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206973864] [2020-10-13 10:42:57,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:42:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:42:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:42:57,179 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 22 states. [2020-10-13 10:42:57,937 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-13 10:42:58,199 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-13 10:42:58,615 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:42:59,205 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 10:42:59,757 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 10:43:00,148 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-13 10:43:00,366 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-13 10:43:00,596 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 10:43:00,818 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-13 10:43:01,022 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-13 10:43:01,204 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-13 10:43:01,376 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-13 10:43:01,759 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 10:43:02,142 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-13 10:43:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:02,161 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 10:43:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:43:02,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-13 10:43:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:02,163 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:43:02,164 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:43:02,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:43:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:43:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-13 10:43:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:43:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 10:43:02,176 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2020-10-13 10:43:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:02,176 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 10:43:02,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:43:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 10:43:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:43:02,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:02,177 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:02,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:43:02,178 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1736831836, now seen corresponding path program 4 times [2020-10-13 10:43:02,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:02,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291889155] [2020-10-13 10:43:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:02,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:04,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:43:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:43:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:43:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:07,945 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 51 [2020-10-13 10:43:08,417 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 10:43:08,754 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-13 10:43:09,172 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 10:43:09,303 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-13 10:43:09,445 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-13 10:43:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:43:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:43:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:43:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:09,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:09,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:09,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:43:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:09,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:09,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:09,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:43:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:10,587 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-13 10:43:13,255 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 427 DAG size of output: 49 [2020-10-13 10:43:13,750 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2020-10-13 10:43:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:43:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:13,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:13,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:43:13,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:43:13,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291889155] [2020-10-13 10:43:13,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:13,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:43:13,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613591536] [2020-10-13 10:43:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:43:13,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:43:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:43:13,844 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 21 states. [2020-10-13 10:43:14,850 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-13 10:43:15,182 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-13 10:43:15,643 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-13 10:43:16,074 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-13 10:43:16,768 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2020-10-13 10:43:17,072 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-13 10:43:17,504 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-13 10:43:17,721 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-13 10:43:18,057 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-13 10:43:18,229 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-13 10:43:18,408 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-13 10:43:19,051 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 103 [2020-10-13 10:43:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:19,078 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-13 10:43:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:43:19,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-10-13 10:43:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:19,081 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:43:19,081 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:43:19,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:43:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:43:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-13 10:43:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:43:19,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-13 10:43:19,093 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 60 [2020-10-13 10:43:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:19,093 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-13 10:43:19,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:43:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-13 10:43:19,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:43:19,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:19,094 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:19,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:43:19,094 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1648538825, now seen corresponding path program 5 times [2020-10-13 10:43:19,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:19,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673580781] [2020-10-13 10:43:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:19,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:20,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:24,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:24,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:43:24,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:43:24,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:43:24,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:43:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:43:24,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:43:24,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:24,363 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 48 [2020-10-13 10:43:24,588 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 10:43:24,716 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 10:43:25,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:25,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:43:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:25,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:25,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:43:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:25,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:43:25,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:43:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:25,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:25,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:43:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:25,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:25,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:43:25,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:25,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-13 10:43:25,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:25,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:25,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:25,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:43:25,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:43:27,820 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 45 [2020-10-13 10:43:40,788 WARN L193 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 835 DAG size of output: 55 [2020-10-13 10:43:42,923 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 231 DAG size of output: 48 [2020-10-13 10:43:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:43:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:42,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:43:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:42,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:43:42,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:43:43,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673580781] [2020-10-13 10:43:43,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:43:43,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:43:43,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858124077] [2020-10-13 10:43:43,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:43:43,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:43:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:43:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:43:43,030 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 24 states. [2020-10-13 10:43:43,969 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-13 10:43:44,607 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-13 10:43:45,081 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 10:43:45,312 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 10:43:45,694 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-13 10:43:45,951 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-13 10:43:46,634 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2020-10-13 10:43:46,913 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-13 10:43:47,588 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 156 [2020-10-13 10:43:47,876 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 10:43:48,627 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 162 [2020-10-13 10:43:48,920 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 10:43:49,650 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 163 [2020-10-13 10:43:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:43:49,705 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 10:43:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:43:49,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-13 10:43:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:43:49,708 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:43:49,708 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:43:49,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:43:49,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:43:49,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 10:43:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:43:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 10:43:49,719 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 62 [2020-10-13 10:43:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:43:49,720 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 10:43:49,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:43:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 10:43:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:43:49,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:43:49,720 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:43:49,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:43:49,721 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:43:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:43:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1648537151, now seen corresponding path program 5 times [2020-10-13 10:43:49,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:43:49,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495070455] [2020-10-13 10:43:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:43:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:51,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:54,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:54,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:43:54,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:43:54,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:55,348 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 78 [2020-10-13 10:43:55,646 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 69 [2020-10-13 10:43:56,068 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-13 10:43:56,477 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 10:43:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:43:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:56,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:56,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:56,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:43:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:43:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:43:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:57,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:57,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:57,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 10:43:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:57,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:57,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:57,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:57,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:43:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:57,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:57,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:43:57,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:57,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:43:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:43:57,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:43:57,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:43:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:43:57,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:43:57,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:43:58,479 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-10-13 10:44:15,283 WARN L193 SmtUtils]: Spent 15.87 s on a formula simplification. DAG size of input: 1269 DAG size of output: 64 [2020-10-13 10:44:17,787 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 261 DAG size of output: 60 [2020-10-13 10:44:17,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 10:44:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:17,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:44:17,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:44:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:44:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 10:44:17,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495070455] [2020-10-13 10:44:17,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:44:17,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:44:17,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390126140] [2020-10-13 10:44:17,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:44:17,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:44:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:44:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:44:17,910 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 23 states. [2020-10-13 10:44:18,966 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-13 10:44:19,565 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-13 10:44:19,970 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 10:44:20,500 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2020-10-13 10:44:21,027 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 10:44:21,738 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 146 [2020-10-13 10:44:22,055 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-13 10:44:22,558 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2020-10-13 10:44:22,875 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 10:44:23,347 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-13 10:44:23,604 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 10:44:23,851 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 10:44:24,088 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-13 10:44:24,343 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-13 10:44:25,145 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2020-10-13 10:44:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:44:25,163 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 10:44:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:44:25,165 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2020-10-13 10:44:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:44:25,166 INFO L225 Difference]: With dead ends: 58 [2020-10-13 10:44:25,166 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 10:44:25,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=149, Invalid=1491, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:44:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 10:44:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 10:44:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:44:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 10:44:25,180 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 62 [2020-10-13 10:44:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:44:25,180 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 10:44:25,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:44:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 10:44:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:44:25,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:44:25,181 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:44:25,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:44:25,181 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:44:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:44:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -597076710, now seen corresponding path program 6 times [2020-10-13 10:44:25,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:44:25,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065670282] [2020-10-13 10:44:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:44:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:44:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:44:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking...