/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:50:26,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:50:26,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:50:26,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:50:26,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:50:26,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:50:26,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:50:26,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:50:26,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:50:26,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:50:26,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:50:26,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:50:26,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:50:26,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:50:26,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:50:26,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:50:26,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:50:26,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:50:26,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:50:26,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:50:26,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:50:26,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:50:26,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:50:26,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:50:26,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:50:26,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:50:26,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:50:26,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:50:26,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:50:26,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:50:26,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:50:26,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:50:26,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:50:26,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:50:26,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:50:26,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:50:26,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:50:26,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:50:26,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:50:26,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:50:26,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:50:26,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 07:50:26,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:50:26,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:50:26,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:50:26,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:50:26,855 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:50:26,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:50:26,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:50:26,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:50:26,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:50:26,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:50:26,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:50:26,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:50:26,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:50:26,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:50:26,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:50:26,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:50:26,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:50:26,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:50:26,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:50:26,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:50:26,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:50:26,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:50:26,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:50:26,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:50:26,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:50:27,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:50:27,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:50:27,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:50:27,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:50:27,370 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:50:27,371 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 07:50:27,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed7a20880/ef3b4a4c1e8d4975872e155da572aa14/FLAG444e30f6e [2020-09-25 07:50:28,104 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:50:28,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 07:50:28,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed7a20880/ef3b4a4c1e8d4975872e155da572aa14/FLAG444e30f6e [2020-09-25 07:50:28,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed7a20880/ef3b4a4c1e8d4975872e155da572aa14 [2020-09-25 07:50:28,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:50:28,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:50:28,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:50:28,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:50:28,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:50:28,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:50:28" (1/1) ... [2020-09-25 07:50:28,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d91e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:28, skipping insertion in model container [2020-09-25 07:50:28,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:50:28" (1/1) ... [2020-09-25 07:50:28,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:50:28,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:50:28,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:50:28,978 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:50:29,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:50:29,089 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:50:29,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29 WrapperNode [2020-09-25 07:50:29,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:50:29,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:50:29,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:50:29,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:50:29,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... [2020-09-25 07:50:29,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:50:29,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:50:29,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:50:29,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:50:29,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 07:50:29,249 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-25 07:50:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-25 07:50:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-25 07:50:29,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:50:29,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 07:50:29,251 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 07:50:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 07:50:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 07:50:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 07:50:29,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 07:50:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 07:50:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 07:50:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 07:50:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 07:50:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 07:50:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 07:50:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 07:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 07:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 07:50:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 07:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 07:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 07:50:29,257 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 07:50:29,258 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 07:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 07:50:29,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 07:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 07:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 07:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 07:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 07:50:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 07:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 07:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 07:50:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 07:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 07:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 07:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 07:50:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 07:50:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 07:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 07:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 07:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 07:50:29,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 07:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 07:50:29,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 07:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 07:50:29,267 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 07:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 07:50:29,268 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 07:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 07:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 07:50:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 07:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 07:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 07:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 07:50:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 07:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 07:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 07:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 07:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 07:50:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 07:50:29,273 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 07:50:29,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 07:50:29,275 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 07:50:29,276 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 07:50:29,277 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 07:50:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 07:50:29,278 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-25 07:50:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 07:50:29,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 07:50:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-25 07:50:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 07:50:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-25 07:50:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 07:50:29,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:50:29,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:50:29,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:50:29,671 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 07:50:29,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:50:29,869 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 07:50:29,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:50:29 BoogieIcfgContainer [2020-09-25 07:50:29,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:50:29,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:50:29,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:50:29,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:50:29,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:50:28" (1/3) ... [2020-09-25 07:50:29,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a171240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:50:29, skipping insertion in model container [2020-09-25 07:50:29,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:50:29" (2/3) ... [2020-09-25 07:50:29,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a171240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:50:29, skipping insertion in model container [2020-09-25 07:50:29,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:50:29" (3/3) ... [2020-09-25 07:50:29,886 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-25 07:50:29,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:50:29,908 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:50:29,928 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:50:29,956 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:50:29,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:50:29,956 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:50:29,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:50:29,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:50:29,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:50:29,957 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:50:29,957 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:50:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 07:50:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 07:50:29,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:29,988 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] [2020-09-25 07:50:29,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:29,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-25 07:50:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:30,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896614449] [2020-09-25 07:50:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:30,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:30,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:30,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 07:50:30,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:50:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-09-25 07:50:30,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:30,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 07:50:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:30,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 07:50:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:30,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:30,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:30,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:30,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 07:50:30,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:30,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:30,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 07:50:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:30,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:30,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:30,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:30,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 07:50:30,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:30,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 07:50:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:30,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:30,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:30,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:30,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:30,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 07:50:30,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:30,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:30,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:30,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:30,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:30,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896614449] [2020-09-25 07:50:30,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:30,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:50:30,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935892735] [2020-09-25 07:50:30,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:50:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:30,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:50:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:50:30,916 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-09-25 07:50:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:31,187 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-09-25 07:50:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 07:50:31,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 07:50:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:31,205 INFO L225 Difference]: With dead ends: 154 [2020-09-25 07:50:31,205 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 07:50:31,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:50:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 07:50:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-09-25 07:50:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 07:50:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-25 07:50:31,285 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-09-25 07:50:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:31,286 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-25 07:50:31,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:50:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-25 07:50:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 07:50:31,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:31,288 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, 1, 1, 1, 1] [2020-09-25 07:50:31,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:50:31,289 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-09-25 07:50:31,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:31,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359042953] [2020-09-25 07:50:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:31,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 07:50:31,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:50:31,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-09-25 07:50:31,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:31,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:31,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:50:31,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:31,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 07:50:31,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:31,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:31,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:31,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:50:31,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:31,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 07:50:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:31,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:31,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 07:50:31,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:31,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:50:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:50:31,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:31,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-25 07:50:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:31,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:31,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:31,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:31,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 07:50:31,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:31,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:32,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359042953] [2020-09-25 07:50:32,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:32,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 07:50:32,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61483113] [2020-09-25 07:50:32,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:50:32,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:50:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:50:32,009 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 7 states. [2020-09-25 07:50:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:32,406 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-09-25 07:50:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 07:50:32,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-25 07:50:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:32,410 INFO L225 Difference]: With dead ends: 114 [2020-09-25 07:50:32,410 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 07:50:32,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:50:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 07:50:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-25 07:50:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 07:50:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 07:50:32,426 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 33 [2020-09-25 07:50:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:32,427 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 07:50:32,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:50:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 07:50:32,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 07:50:32,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:32,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:32,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:50:32,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2090477770, now seen corresponding path program 1 times [2020-09-25 07:50:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:32,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601338788] [2020-09-25 07:50:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:32,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:32,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:33,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:35,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 07:50:35,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:50:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2732 [2020-09-25 07:50:35,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:35,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:35,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 07:50:35,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:35,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 07:50:35,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:50:35,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:35,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:35,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:35,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:35,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:35,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:35,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:35,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:35,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 07:50:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:35,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:35,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:35,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 07:50:35,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:35,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:35,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:35,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:35,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:35,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:35,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 07:50:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:35,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:35,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:35,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:35,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:50:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:35,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:35,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:35,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 07:50:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:50:35,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601338788] [2020-09-25 07:50:35,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:35,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 07:50:35,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84621538] [2020-09-25 07:50:35,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 07:50:35,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:35,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 07:50:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 07:50:35,307 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 6 states. [2020-09-25 07:50:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:35,616 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2020-09-25 07:50:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 07:50:35,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-25 07:50:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:35,618 INFO L225 Difference]: With dead ends: 143 [2020-09-25 07:50:35,618 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 07:50:35,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 07:50:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 07:50:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-09-25 07:50:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 07:50:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-09-25 07:50:35,631 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 41 [2020-09-25 07:50:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:35,631 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-09-25 07:50:35,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 07:50:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-09-25 07:50:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 07:50:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:35,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:35,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:50:35,634 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-09-25 07:50:35,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:35,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894119681] [2020-09-25 07:50:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:36,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:36,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 07:50:36,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:50:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-09-25 07:50:36,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:36,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:36,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:50:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:36,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 07:50:36,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:36,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:36,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:36,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:36,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:36,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:36,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 07:50:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 07:50:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:36,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:50:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:50:36,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:36,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 07:50:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:36,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:36,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:36,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:36,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:36,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:50:36,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:36,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:36,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:36,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:36,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:36,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894119681] [2020-09-25 07:50:36,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:36,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 07:50:36,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972347465] [2020-09-25 07:50:36,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 07:50:36,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 07:50:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 07:50:36,715 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 9 states. [2020-09-25 07:50:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:37,233 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2020-09-25 07:50:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 07:50:37,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 07:50:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:37,235 INFO L225 Difference]: With dead ends: 135 [2020-09-25 07:50:37,235 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 07:50:37,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:50:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 07:50:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-09-25 07:50:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 07:50:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-25 07:50:37,247 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-25 07:50:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:37,248 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-25 07:50:37,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 07:50:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-25 07:50:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 07:50:37,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:37,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:37,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:50:37,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:37,251 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-09-25 07:50:37,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937360959] [2020-09-25 07:50:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:37,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:39,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:39,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 07:50:39,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 07:50:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2500 [2020-09-25 07:50:39,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:39,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 07:50:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 07:50:39,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 07:50:39,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:39,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:39,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:39,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:39,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:39,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:50:39,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:50:39,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:50:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:40,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:40,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 07:50:40,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:40,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-25 07:50:40,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:40,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:40,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 07:50:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 07:50:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:50:40,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 07:50:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:40,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:40,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:40,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:40,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:40,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 07:50:40,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:40,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:40,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 07:50:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:40,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:50:40,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:40,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937360959] [2020-09-25 07:50:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 07:50:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576134869] [2020-09-25 07:50:40,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 07:50:40,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 07:50:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 07:50:40,306 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 13 states. [2020-09-25 07:50:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:40,898 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-09-25 07:50:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 07:50:40,899 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-09-25 07:50:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:40,904 INFO L225 Difference]: With dead ends: 123 [2020-09-25 07:50:40,905 INFO L226 Difference]: Without dead ends: 118 [2020-09-25 07:50:40,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-09-25 07:50:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-25 07:50:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2020-09-25 07:50:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 07:50:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-09-25 07:50:40,932 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 44 [2020-09-25 07:50:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:40,932 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-09-25 07:50:40,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 07:50:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-09-25 07:50:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 07:50:40,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:40,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:40,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 07:50:40,938 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:40,939 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-09-25 07:50:40,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:40,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136085737] [2020-09-25 07:50:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:41,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 07:50:41,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:41,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-25 07:50:41,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:41,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:50:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:41,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 07:50:41,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:41,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:41,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:41,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:41,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:41,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:41,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 07:50:41,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:50:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:41,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 07:50:41,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:41,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-25 07:50:41,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:41,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:50:41,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 07:50:41,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 07:50:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:41,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:41,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 07:50:41,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:41,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 07:50:41,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:41,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 07:50:41,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:41,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:50:41,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136085737] [2020-09-25 07:50:41,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:41,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 07:50:41,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610973913] [2020-09-25 07:50:41,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 07:50:41,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 07:50:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 07:50:41,416 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 9 states. [2020-09-25 07:50:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:41,860 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-09-25 07:50:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 07:50:41,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-09-25 07:50:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:41,862 INFO L225 Difference]: With dead ends: 146 [2020-09-25 07:50:41,863 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 07:50:41,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:50:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 07:50:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-25 07:50:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 07:50:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-09-25 07:50:41,886 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 51 [2020-09-25 07:50:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:41,887 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-09-25 07:50:41,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 07:50:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-09-25 07:50:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 07:50:41,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:41,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:41,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 07:50:41,893 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1391720975, now seen corresponding path program 2 times [2020-09-25 07:50:41,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:41,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589235776] [2020-09-25 07:50:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:41,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:41,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:42,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:42,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:43,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:45,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 07:50:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 07:50:45,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3337 [2020-09-25 07:50:45,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:45,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:50:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 07:50:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 07:50:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:45,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:45,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:45,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:45,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:50:45,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:45,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:45,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:45,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:45,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 07:50:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:45,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:45,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:45,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:45,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:50:45,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:45,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:45,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:45,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:45,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:45,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:45,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 07:50:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:45,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:45,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:45,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:45,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:45,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:45,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:45,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:45,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:45,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:50:45,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589235776] [2020-09-25 07:50:45,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:45,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 07:50:45,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267212292] [2020-09-25 07:50:45,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 07:50:45,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 07:50:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:50:45,339 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 5 states. [2020-09-25 07:50:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:45,498 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2020-09-25 07:50:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:50:45,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-09-25 07:50:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:45,500 INFO L225 Difference]: With dead ends: 179 [2020-09-25 07:50:45,500 INFO L226 Difference]: Without dead ends: 109 [2020-09-25 07:50:45,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:50:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-25 07:50:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-09-25 07:50:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 07:50:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2020-09-25 07:50:45,511 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 51 [2020-09-25 07:50:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:45,511 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2020-09-25 07:50:45,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 07:50:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2020-09-25 07:50:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 07:50:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:45,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:45,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 07:50:45,514 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1801872195, now seen corresponding path program 2 times [2020-09-25 07:50:45,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:45,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630340343] [2020-09-25 07:50:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:47,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:47,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 07:50:47,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:50:47,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2384 [2020-09-25 07:50:47,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:47,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 07:50:47,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:47,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:47,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:47,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:47,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:47,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:50:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:47,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:48,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:50:48,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:48,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 07:50:48,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:48,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:48,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 07:50:48,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:48,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 07:50:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:48,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:48,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:48,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:48,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:48,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:48,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:48,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:48,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:48,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630340343] [2020-09-25 07:50:48,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:48,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 07:50:48,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588408065] [2020-09-25 07:50:48,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 07:50:48,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 07:50:48,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:50:48,220 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 11 states. [2020-09-25 07:50:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:48,762 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-09-25 07:50:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 07:50:48,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-09-25 07:50:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:48,765 INFO L225 Difference]: With dead ends: 160 [2020-09-25 07:50:48,765 INFO L226 Difference]: Without dead ends: 136 [2020-09-25 07:50:48,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-25 07:50:48,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-25 07:50:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2020-09-25 07:50:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 07:50:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2020-09-25 07:50:48,776 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 53 [2020-09-25 07:50:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:48,776 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2020-09-25 07:50:48,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 07:50:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2020-09-25 07:50:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 07:50:48,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:48,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:48,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 07:50:48,778 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash 840072530, now seen corresponding path program 3 times [2020-09-25 07:50:48,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:48,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715675959] [2020-09-25 07:50:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:48,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:48,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:48,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:48,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:49,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:49,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 07:50:49,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:50:49,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 987 [2020-09-25 07:50:49,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:49,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 07:50:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:49,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:49,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:49,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:49,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:49,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:49,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:49,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:49,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:49,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-25 07:50:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:49,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:49,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:49,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:49,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:49,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 07:50:49,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:49,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:49,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:50:49,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:49,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:50:49,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:49,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 07:50:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:49,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:49,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:50:49,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:49,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:49,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:49,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:50:49,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715675959] [2020-09-25 07:50:49,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:49,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 07:50:49,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593316411] [2020-09-25 07:50:49,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 07:50:49,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 07:50:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:50:49,972 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand 11 states. [2020-09-25 07:50:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:50,705 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2020-09-25 07:50:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 07:50:50,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-09-25 07:50:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:50,708 INFO L225 Difference]: With dead ends: 160 [2020-09-25 07:50:50,708 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 07:50:50,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-09-25 07:50:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 07:50:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2020-09-25 07:50:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 07:50:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-09-25 07:50:50,719 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 53 [2020-09-25 07:50:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:50,719 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-09-25 07:50:50,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 07:50:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-09-25 07:50:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 07:50:50,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:50,721 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:50,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 07:50:50,721 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -243195669, now seen corresponding path program 1 times [2020-09-25 07:50:50,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:50,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143430083] [2020-09-25 07:50:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:51,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:52,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:52,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 07:50:52,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 07:50:52,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-09-25 07:50:52,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:52,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:50:52,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 07:50:52,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:52,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:52,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:52,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:52,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:52,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:52,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 07:50:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:52,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:52,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:52,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 07:50:52,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-25 07:50:52,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:52,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:50:52,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:52,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 07:50:52,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:52,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 07:50:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:52,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:52,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 07:50:52,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:52,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 07:50:52,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:52,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:52,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 07:50:52,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:50:52,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143430083] [2020-09-25 07:50:52,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:52,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 07:50:52,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524768444] [2020-09-25 07:50:52,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 07:50:52,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 07:50:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 07:50:52,465 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 11 states. [2020-09-25 07:50:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:53,021 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-09-25 07:50:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 07:50:53,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 07:50:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:53,023 INFO L225 Difference]: With dead ends: 154 [2020-09-25 07:50:53,023 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 07:50:53,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-09-25 07:50:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 07:50:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2020-09-25 07:50:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 07:50:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-09-25 07:50:53,034 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 59 [2020-09-25 07:50:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:53,035 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-09-25 07:50:53,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 07:50:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-09-25 07:50:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 07:50:53,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:53,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:53,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 07:50:53,037 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:53,037 INFO L82 PathProgramCache]: Analyzing trace with hash -655327975, now seen corresponding path program 1 times [2020-09-25 07:50:53,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:53,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140000356] [2020-09-25 07:50:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:53,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:58,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:58,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 07:50:58,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 07:50:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 07:50:58,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:58,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:58,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:58,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:58,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:58,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:58,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:50:58,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:58,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:58,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:58,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:58,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:58,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:58,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 07:50:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:58,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:58,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:50:58,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:58,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-25 07:50:58,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:58,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:50:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:58,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 07:50:58,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:58,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 07:50:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:58,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:58,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:58,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:58,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:58,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:50:58,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:58,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 07:50:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:50:58,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140000356] [2020-09-25 07:50:58,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:50:58,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 07:50:58,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268529596] [2020-09-25 07:50:58,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 07:50:58,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 07:50:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:50:58,370 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 12 states. [2020-09-25 07:50:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:50:58,913 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-09-25 07:50:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 07:50:58,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-09-25 07:50:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:50:58,915 INFO L225 Difference]: With dead ends: 158 [2020-09-25 07:50:58,915 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 07:50:58,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-25 07:50:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 07:50:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2020-09-25 07:50:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-25 07:50:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2020-09-25 07:50:58,930 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2020-09-25 07:50:58,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:50:58,932 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2020-09-25 07:50:58,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 07:50:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2020-09-25 07:50:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 07:50:58,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:50:58,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:50:58,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 07:50:58,934 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:50:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:50:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1727079450, now seen corresponding path program 3 times [2020-09-25 07:50:58,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:50:58,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584081537] [2020-09-25 07:50:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:50:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:58,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:59,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:59,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 07:50:59,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:50:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-09-25 07:50:59,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:59,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 07:50:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 07:50:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 07:50:59,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:50:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:59,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:59,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:59,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:50:59,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:59,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:50:59,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:59,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:50:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:50:59,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:50:59,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:50:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:59,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:59,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:50:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:50:59,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 07:50:59,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:59,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 07:50:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:50:59,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:50:59,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:50:59,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 07:50:59,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:50:59,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 07:50:59,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:50:59,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:50:59,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 07:50:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:50:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 07:50:59,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:50:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 07:50:59,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584081537] [2020-09-25 07:50:59,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:50:59,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-25 07:50:59,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596118362] [2020-09-25 07:50:59,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 07:50:59,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:50:59,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 07:50:59,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:50:59,781 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 12 states. [2020-09-25 07:51:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:00,274 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-09-25 07:51:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 07:51:00,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-09-25 07:51:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:00,281 INFO L225 Difference]: With dead ends: 119 [2020-09-25 07:51:00,281 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 07:51:00,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-09-25 07:51:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 07:51:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-09-25 07:51:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-25 07:51:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-09-25 07:51:00,289 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 62 [2020-09-25 07:51:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:00,290 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-09-25 07:51:00,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 07:51:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-09-25 07:51:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 07:51:00,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:00,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:00,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 07:51:00,292 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 2 times [2020-09-25 07:51:00,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:00,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608176343] [2020-09-25 07:51:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:00,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:00,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:01,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:01,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 07:51:01,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:51:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-09-25 07:51:01,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:01,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 07:51:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 07:51:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 07:51:01,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:01,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:01,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:01,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:01,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:51:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:01,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:51:01,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:01,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:01,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:01,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:01,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:51:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:01,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:01,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:51:01,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:01,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 07:51:01,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:01,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:51:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:01,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 07:51:01,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 07:51:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:01,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:01,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 07:51:01,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:01,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 07:51:01,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:01,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:51:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:51:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 07:51:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 07:51:01,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608176343] [2020-09-25 07:51:01,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:51:01,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 07:51:01,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560618633] [2020-09-25 07:51:01,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 07:51:01,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:01,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 07:51:01,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-25 07:51:01,864 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 16 states. [2020-09-25 07:51:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:02,829 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-09-25 07:51:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 07:51:02,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-09-25 07:51:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:02,831 INFO L225 Difference]: With dead ends: 131 [2020-09-25 07:51:02,832 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 07:51:02,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-09-25 07:51:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 07:51:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2020-09-25 07:51:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-25 07:51:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2020-09-25 07:51:02,850 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 69 [2020-09-25 07:51:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:02,850 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2020-09-25 07:51:02,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 07:51:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2020-09-25 07:51:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 07:51:02,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:02,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:02,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 07:51:02,852 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 539422087, now seen corresponding path program 1 times [2020-09-25 07:51:02,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:02,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21879702] [2020-09-25 07:51:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:02,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:03,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:03,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 07:51:03,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:03,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-09-25 07:51:03,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:03,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 07:51:03,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:51:03,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 07:51:03,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:03,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:03,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:03,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:03,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:03,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:03,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 07:51:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:03,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 07:51:03,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:51:03,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 07:51:03,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:03,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 07:51:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:03,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 07:51:03,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:03,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 07:51:03,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21879702] [2020-09-25 07:51:03,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:51:03,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 07:51:03,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013966526] [2020-09-25 07:51:03,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 07:51:03,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 07:51:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-25 07:51:03,396 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 13 states. [2020-09-25 07:51:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:04,293 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2020-09-25 07:51:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 07:51:04,293 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-09-25 07:51:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:04,295 INFO L225 Difference]: With dead ends: 171 [2020-09-25 07:51:04,295 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 07:51:04,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-25 07:51:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 07:51:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 94. [2020-09-25 07:51:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-25 07:51:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-09-25 07:51:04,304 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 71 [2020-09-25 07:51:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:04,304 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-09-25 07:51:04,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 07:51:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-09-25 07:51:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 07:51:04,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:04,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:04,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 07:51:04,306 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 3 times [2020-09-25 07:51:04,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:04,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865821147] [2020-09-25 07:51:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:04,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:04,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:05,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:06,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:09,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:09,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 07:51:09,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 07:51:09,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 07:51:09,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:09,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 07:51:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:51:09,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 07:51:09,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:09,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:09,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:09,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:09,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:51:09,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:09,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 07:51:09,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:09,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:09,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:09,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:09,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 07:51:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:09,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:09,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:09,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:09,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 07:51:09,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:51:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-09-25 07:51:09,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:09,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:51:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 07:51:09,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 07:51:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:09,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:09,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 07:51:09,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:09,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 07:51:09,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:09,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 07:51:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:09,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 07:51:09,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-25 07:51:09,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865821147] [2020-09-25 07:51:09,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:51:09,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 07:51:09,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912161738] [2020-09-25 07:51:09,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 07:51:09,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 07:51:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 07:51:09,854 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 12 states. [2020-09-25 07:51:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:10,574 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-09-25 07:51:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 07:51:10,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 07:51:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:10,579 INFO L225 Difference]: With dead ends: 126 [2020-09-25 07:51:10,579 INFO L226 Difference]: Without dead ends: 121 [2020-09-25 07:51:10,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-09-25 07:51:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-25 07:51:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-09-25 07:51:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 07:51:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2020-09-25 07:51:10,594 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 76 [2020-09-25 07:51:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:10,595 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2020-09-25 07:51:10,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 07:51:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2020-09-25 07:51:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 07:51:10,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:10,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:10,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 07:51:10,597 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -446623556, now seen corresponding path program 2 times [2020-09-25 07:51:10,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:10,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696243615] [2020-09-25 07:51:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:10,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 07:51:10,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:10,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-09-25 07:51:10,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:10,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 07:51:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 07:51:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 07:51:10,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:11,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:51:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:11,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:11,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:51:11,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:11,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 07:51:11,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:11,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:11,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:11,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:51:11,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:11,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:11,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 07:51:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:11,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:11,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 07:51:11,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:11,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-25 07:51:11,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:11,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 07:51:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 07:51:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 07:51:11,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:51:11,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-25 07:51:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:51:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:51:11,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:51:11,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 07:51:11,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:51:11,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 07:51:11,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:51:11,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:51:11,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:51:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 07:51:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:51:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 07:51:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 07:51:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696243615] [2020-09-25 07:51:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 07:51:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 07:51:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549491724] [2020-09-25 07:51:11,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 07:51:11,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:51:11,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 07:51:11,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 07:51:11,317 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand 13 states. [2020-09-25 07:51:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:51:11,861 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-25 07:51:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 07:51:11,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-09-25 07:51:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:51:11,863 INFO L225 Difference]: With dead ends: 164 [2020-09-25 07:51:11,863 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 07:51:11,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-09-25 07:51:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 07:51:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-09-25 07:51:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 07:51:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-09-25 07:51:11,875 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 77 [2020-09-25 07:51:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:51:11,875 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-09-25 07:51:11,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 07:51:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-09-25 07:51:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 07:51:11,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:51:11,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:51:11,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 07:51:11,878 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:51:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:51:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1305863211, now seen corresponding path program 4 times [2020-09-25 07:51:11,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:51:11,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185021626] [2020-09-25 07:51:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:51:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 07:51:11,899 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 07:51:11,899 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 07:51:11,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 07:51:11,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 07:51:11 BoogieIcfgContainer [2020-09-25 07:51:11,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 07:51:11,930 INFO L168 Benchmark]: Toolchain (without parser) took 43547.82 ms. Allocated memory was 145.8 MB in the beginning and 466.6 MB in the end (delta: 320.9 MB). Free memory was 100.7 MB in the beginning and 321.6 MB in the end (delta: -220.9 MB). Peak memory consumption was 100.0 MB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,931 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.29 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 100.1 MB in the beginning and 169.5 MB in the end (delta: -69.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,932 INFO L168 Benchmark]: Boogie Preprocessor took 72.82 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 166.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,933 INFO L168 Benchmark]: RCFGBuilder took 711.93 ms. Allocated memory is still 202.9 MB. Free memory was 166.1 MB in the beginning and 120.6 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,934 INFO L168 Benchmark]: TraceAbstraction took 42049.83 ms. Allocated memory was 202.9 MB in the beginning and 466.6 MB in the end (delta: 263.7 MB). Free memory was 119.9 MB in the beginning and 321.6 MB in the end (delta: -201.7 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. [2020-09-25 07:51:11,938 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 703.29 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 100.1 MB in the beginning and 169.5 MB in the end (delta: -69.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.82 ms. Allocated memory is still 202.9 MB. Free memory was 169.5 MB in the beginning and 166.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 711.93 ms. Allocated memory is still 202.9 MB. Free memory was 166.1 MB in the beginning and 120.6 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 42049.83 ms. Allocated memory was 202.9 MB in the beginning and 466.6 MB in the end (delta: 263.7 MB). Free memory was 119.9 MB in the beginning and 321.6 MB in the end (delta: -201.7 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 41.9s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1015 SDtfs, 2000 SDslu, 2514 SDs, 0 SdLazy, 5328 SolverSat, 295 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 361 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 342 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 32.2s InterpolantComputationTime, 956 NumberOfCodeBlocks, 956 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 857 ConstructedInterpolants, 0 QuantifiedInterpolants, 130156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 141/216 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...