/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 --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 interpolation-heuristic=FIRST --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-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:24:28,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:24:28,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:24:28,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:24:28,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:24:28,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:24:28,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:24:28,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:24:28,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:24:28,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:24:28,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:24:28,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:24:28,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:24:28,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:24:28,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:24:28,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:24:28,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:24:28,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:24:28,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:24:28,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:24:28,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:24:28,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:24:28,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:24:28,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:24:28,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:24:28,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:24:28,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:24:28,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:24:28,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:24:28,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:24:28,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:24:28,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:24:28,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:24:28,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:24:28,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:24:28,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:24:28,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:24:28,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:24:28,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:24:28,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:24:28,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:24:28,184 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 [2020-09-21 11:24:28,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:24:28,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:24:28,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:24:28,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:24:28,242 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:24:28,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:24:28,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:24:28,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:24:28,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:24:28,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:24:28,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:24:28,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:24:28,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:24:28,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:24:28,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:24:28,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:24:28,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:24:28,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:24:28,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:24:28,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:24:28,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:24:28,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:24:28,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:24:28,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:24:28,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:24:28,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:24:28,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:24:28,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:24:28,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:24:28,249 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:24:28,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:24:28,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:24:28,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:24:28,793 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:24:28,793 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:24:28,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 11:24:28,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bef7d83d/f04aa9bb169b420e8e99bd7f395ff208/FLAG11a7237f3 [2020-09-21 11:24:29,545 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:24:29,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 11:24:29,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bef7d83d/f04aa9bb169b420e8e99bd7f395ff208/FLAG11a7237f3 [2020-09-21 11:24:29,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bef7d83d/f04aa9bb169b420e8e99bd7f395ff208 [2020-09-21 11:24:29,803 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:24:29,810 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:24:29,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:24:29,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:24:29,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:24:29,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:24:29" (1/1) ... [2020-09-21 11:24:29,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:29, skipping insertion in model container [2020-09-21 11:24:29,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:24:29" (1/1) ... [2020-09-21 11:24:29,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:24:29,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:24:30,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:24:30,428 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:24:30,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:24:30,580 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:24:30,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30 WrapperNode [2020-09-21 11:24:30,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:24:30,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:24:30,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:24:30,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:24:30,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (1/1) ... [2020-09-21 11:24:30,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:24:30,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:24:30,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:24:30,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:24:30,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (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 [2020-09-21 11:24:30,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:24:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:24:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:24:30,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:24:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 11:24:30,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:24:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:24:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:24:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:24:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:24:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:24:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:24:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:24:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:24:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:24:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:24:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:24:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:24:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:24:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:24:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:24:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:24:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:24:30,746 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:24:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:24:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:24:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:24:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:24:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:24:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:24:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:24:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:24:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:24:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:24:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:24:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:24:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:24:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:24:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:24:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:24:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:24:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:24:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:24:30,759 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:24:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:24:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:24:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:24:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:24:31,201 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 11:24:31,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:24:31,534 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-21 11:24:31,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:24:31 BoogieIcfgContainer [2020-09-21 11:24:31,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:24:31,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:24:31,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:24:31,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:24:31,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:24:29" (1/3) ... [2020-09-21 11:24:31,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319eddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:24:31, skipping insertion in model container [2020-09-21 11:24:31,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:30" (2/3) ... [2020-09-21 11:24:31,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3319eddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:24:31, skipping insertion in model container [2020-09-21 11:24:31,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:24:31" (3/3) ... [2020-09-21 11:24:31,556 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-21 11:24:31,569 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:24:31,579 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:24:31,602 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:24:31,632 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:24:31,632 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:24:31,632 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:24:31,632 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:24:31,632 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:24:31,633 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:24:31,633 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:24:31,633 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:24:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-09-21 11:24:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:24:31,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:31,665 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] [2020-09-21 11:24:31,666 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-09-21 11:24:31,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:31,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295809237] [2020-09-21 11:24:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:31,863 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:31,864 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:31,864 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:31,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:31,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:24:31,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:31,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:24:31,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:31,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:24:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:31,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:31,948 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:31,948 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:31,948 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:31,949 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:31,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:31,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:31,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:31,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:31,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:31,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295809237] [2020-09-21 11:24:31,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:31,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:24:31,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849680504] [2020-09-21 11:24:31,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:24:31,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:24:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:24:31,994 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-09-21 11:24:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:32,192 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-09-21 11:24:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:24:32,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 11:24:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:32,206 INFO L225 Difference]: With dead ends: 108 [2020-09-21 11:24:32,206 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 11:24:32,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:24:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 11:24:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-21 11:24:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:24:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-09-21 11:24:32,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-09-21 11:24:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:32,263 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-09-21 11:24:32,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:24:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-09-21 11:24:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:24:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:32,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:32,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:24:32,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-09-21 11:24:32,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:32,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379104642] [2020-09-21 11:24:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,316 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,317 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,317 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,317 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:24:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:24:32,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:24:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:24:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:32,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,370 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,370 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,371 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,371 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:32,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:32,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:32,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:32,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:32,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:32,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379104642] [2020-09-21 11:24:32,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:32,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:24:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122785897] [2020-09-21 11:24:32,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:24:32,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:24:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:24:32,383 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-09-21 11:24:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:32,519 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-09-21 11:24:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:24:32,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-09-21 11:24:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:32,523 INFO L225 Difference]: With dead ends: 75 [2020-09-21 11:24:32,524 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 11:24:32,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:24:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 11:24:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 11:24:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 11:24:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-09-21 11:24:32,536 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-09-21 11:24:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:32,536 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-09-21 11:24:32,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:24:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-09-21 11:24:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:24:32,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:32,538 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] [2020-09-21 11:24:32,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:24:32,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-09-21 11:24:32,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:32,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864263042] [2020-09-21 11:24:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,573 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,573 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,574 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,574 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:24:32,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:24:32,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:24:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:24:32,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:24:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,615 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,616 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,616 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,616 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:32,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:32,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:32,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:32,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:32,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:32,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864263042] [2020-09-21 11:24:32,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:32,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:24:32,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511452664] [2020-09-21 11:24:32,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:24:32,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:24:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:24:32,627 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-09-21 11:24:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:32,757 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-09-21 11:24:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:24:32,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-09-21 11:24:32,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:32,758 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:24:32,759 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 11:24:32,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:24:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 11:24:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-21 11:24:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:24:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-09-21 11:24:32,768 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-09-21 11:24:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-09-21 11:24:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:24:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-09-21 11:24:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:24:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:32,770 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] [2020-09-21 11:24:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:24:32,770 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-09-21 11:24:32,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:32,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566233096] [2020-09-21 11:24:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,839 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,840 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,840 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,840 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:24:32,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:24:32,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:24:32,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:24:32,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:24:32,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:32,942 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:32,943 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:32,943 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:32,943 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:32,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:32,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:32,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:32,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566233096] [2020-09-21 11:24:32,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:32,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:24:32,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765243012] [2020-09-21 11:24:32,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:24:32,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:24:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:24:32,955 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-09-21 11:24:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:33,204 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-09-21 11:24:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:24:33,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-21 11:24:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:33,205 INFO L225 Difference]: With dead ends: 82 [2020-09-21 11:24:33,205 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 11:24:33,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:24:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 11:24:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-09-21 11:24:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 11:24:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-09-21 11:24:33,226 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-09-21 11:24:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:33,226 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-09-21 11:24:33,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:24:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-09-21 11:24:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:24:33,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:33,231 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:33,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:24:33,232 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-09-21 11:24:33,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:33,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888850845] [2020-09-21 11:24:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:33,284 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:33,284 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:33,284 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:33,285 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:33,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:24:33,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:33,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:24:33,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:24:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:24:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:24:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:33,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:33,353 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:33,353 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:33,354 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:33,354 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:33,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:33,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:33,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:33,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888850845] [2020-09-21 11:24:33,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:33,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:24:33,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397610903] [2020-09-21 11:24:33,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:24:33,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:24:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:24:33,362 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-09-21 11:24:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:33,569 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 11:24:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:24:33,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 11:24:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:33,571 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:24:33,571 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 11:24:33,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:24:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 11:24:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-09-21 11:24:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:24:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-09-21 11:24:33,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-09-21 11:24:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:33,594 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-09-21 11:24:33,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:24:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-09-21 11:24:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:24:33,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:33,595 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:33,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:24:33,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:33,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-09-21 11:24:33,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:33,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742920354] [2020-09-21 11:24:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:33,656 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:33,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:33,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:33,657 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:33,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:24:33,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:33,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:24:33,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:24:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 11:24:33,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:24:33,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:33,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:33,736 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:33,737 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:33,737 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:33,738 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:33,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:33,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:33,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:24:33,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:33,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742920354] [2020-09-21 11:24:33,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:33,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:24:33,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173552183] [2020-09-21 11:24:33,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:24:33,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:24:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:24:33,750 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-09-21 11:24:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:33,968 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 11:24:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:24:33,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 11:24:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:33,971 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:24:33,971 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 11:24:33,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:24:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 11:24:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-09-21 11:24:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 11:24:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-09-21 11:24:33,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-09-21 11:24:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:33,980 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-09-21 11:24:33,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:24:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-09-21 11:24:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 11:24:33,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:33,982 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] [2020-09-21 11:24:33,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:24:33,982 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-09-21 11:24:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:33,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511445219] [2020-09-21 11:24:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:34,061 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:34,061 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:34,061 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:34,062 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:34,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:24:34,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:34,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-21 11:24:34,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:24:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:24:34,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:34,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:34,206 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:34,206 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:34,206 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:34,206 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:34,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:34,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:34,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:34,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:34,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:34,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511445219] [2020-09-21 11:24:34,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:34,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:24:34,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338422956] [2020-09-21 11:24:34,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:24:34,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:24:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:24:34,241 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-09-21 11:24:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:34,596 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-09-21 11:24:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:24:34,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 11:24:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:34,598 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:24:34,598 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 11:24:34,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 11:24:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-09-21 11:24:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 11:24:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-09-21 11:24:34,606 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-09-21 11:24:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:34,606 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-09-21 11:24:34,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:24:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-09-21 11:24:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 11:24:34,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:34,608 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] [2020-09-21 11:24:34,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:24:34,608 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-09-21 11:24:34,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:34,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486417313] [2020-09-21 11:24:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:34,672 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:34,672 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:34,673 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:34,673 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:34,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 11:24:34,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:24:34,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:24:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:34,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:34,772 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:34,773 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:34,773 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:34,773 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:34,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:34,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:34,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:34,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:34,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486417313] [2020-09-21 11:24:34,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:34,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:24:34,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901904318] [2020-09-21 11:24:34,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:24:34,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:24:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:24:34,783 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-09-21 11:24:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:35,222 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-09-21 11:24:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:24:35,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 11:24:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:35,224 INFO L225 Difference]: With dead ends: 95 [2020-09-21 11:24:35,225 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:24:35,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:24:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-09-21 11:24:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 11:24:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-09-21 11:24:35,262 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-09-21 11:24:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:35,263 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-09-21 11:24:35,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:24:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-09-21 11:24:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:24:35,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:35,265 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] [2020-09-21 11:24:35,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:24:35,265 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-09-21 11:24:35,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:35,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594057178] [2020-09-21 11:24:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:24:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -11 [2020-09-21 11:24:35,409 FATAL L256 erpolLogProxyWrapper]: Difference in width: 11 [2020-09-21 11:24:35,409 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:24:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:35,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:24:35,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:35,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:35,613 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:35,613 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:35,613 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:35,613 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:35,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:35,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:35,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:35,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:35,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:35,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:35,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:35,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:35,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594057178] [2020-09-21 11:24:35,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:35,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:24:35,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566438413] [2020-09-21 11:24:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:24:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:24:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:24:35,629 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-09-21 11:24:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:36,116 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-09-21 11:24:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:24:36,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-21 11:24:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:36,118 INFO L225 Difference]: With dead ends: 99 [2020-09-21 11:24:36,118 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 11:24:36,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 11:24:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-09-21 11:24:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 11:24:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-09-21 11:24:36,126 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-09-21 11:24:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:36,126 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-09-21 11:24:36,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:24:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-09-21 11:24:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:24:36,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:36,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:36,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:24:36,128 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:36,128 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-09-21 11:24:36,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:36,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894822937] [2020-09-21 11:24:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:36,243 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:24:36,243 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -11 [2020-09-21 11:24:36,243 FATAL L256 erpolLogProxyWrapper]: Difference in width: 11 [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:36,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:24:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:36,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:24:36,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:36,454 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:36,454 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:36,454 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:36,454 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:36,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:36,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:36,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:36,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:36,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:36,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:36,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:36,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:36,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894822937] [2020-09-21 11:24:36,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:36,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:24:36,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982594856] [2020-09-21 11:24:36,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:24:36,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:36,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:24:36,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:24:36,466 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-09-21 11:24:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:36,985 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-09-21 11:24:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:24:36,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 11:24:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:36,988 INFO L225 Difference]: With dead ends: 101 [2020-09-21 11:24:36,988 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 11:24:36,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 11:24:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-09-21 11:24:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 11:24:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-09-21 11:24:37,007 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-09-21 11:24:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:37,007 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-09-21 11:24:37,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:24:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-09-21 11:24:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:24:37,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:37,009 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:37,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:24:37,010 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-09-21 11:24:37,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:37,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646531017] [2020-09-21 11:24:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:37,121 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -11 [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Difference in width: 11 [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:37,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 11:24:37,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:24:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:24:37,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:37,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:37,280 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:37,280 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:37,280 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:37,280 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:37,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:37,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:37,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:37,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:37,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:37,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646531017] [2020-09-21 11:24:37,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:37,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:24:37,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050459347] [2020-09-21 11:24:37,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:24:37,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:37,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:24:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:24:37,290 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-09-21 11:24:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:37,724 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-09-21 11:24:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:24:37,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 11:24:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:37,726 INFO L225 Difference]: With dead ends: 94 [2020-09-21 11:24:37,726 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 11:24:37,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 11:24:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-21 11:24:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 11:24:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-09-21 11:24:37,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-09-21 11:24:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:37,734 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-09-21 11:24:37,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:24:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-09-21 11:24:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:24:37,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:37,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:37,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:24:37,736 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-09-21 11:24:37,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:37,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812997521] [2020-09-21 11:24:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:37,855 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:24:37,855 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:37,855 FATAL L256 erpolLogProxyWrapper]: Difference in width: 4 [2020-09-21 11:24:37,856 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:37,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:24:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-21 11:24:37,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:24:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:24:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,076 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,076 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,076 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,076 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:38,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:38,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:38,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812997521] [2020-09-21 11:24:38,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:38,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:24:38,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811538860] [2020-09-21 11:24:38,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:24:38,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:38,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:24:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:24:38,086 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-09-21 11:24:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:38,607 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-09-21 11:24:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:24:38,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-21 11:24:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:38,608 INFO L225 Difference]: With dead ends: 92 [2020-09-21 11:24:38,608 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 11:24:38,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:24:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 11:24:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-09-21 11:24:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 11:24:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2020-09-21 11:24:38,614 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 39 [2020-09-21 11:24:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:38,614 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2020-09-21 11:24:38,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:24:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2020-09-21 11:24:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:24:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:38,615 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] [2020-09-21 11:24:38,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:24:38,616 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-09-21 11:24:38,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:38,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467115316] [2020-09-21 11:24:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,728 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:24:38,728 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,728 FATAL L256 erpolLogProxyWrapper]: Difference in width: 2 [2020-09-21 11:24:38,729 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:24:38,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-21 11:24:38,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:24:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:38,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:24:38,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,903 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,903 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,903 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,904 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:38,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:38,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:38,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:38,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:38,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:38,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467115316] [2020-09-21 11:24:38,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:38,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:24:38,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176743417] [2020-09-21 11:24:38,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:24:38,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:24:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:24:38,919 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand 11 states. [2020-09-21 11:24:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:39,331 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-09-21 11:24:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:24:39,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-21 11:24:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:39,334 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:24:39,334 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 11:24:39,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:24:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 11:24:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-09-21 11:24:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 11:24:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-09-21 11:24:39,342 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 39 [2020-09-21 11:24:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:39,342 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-09-21 11:24:39,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:24:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-09-21 11:24:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:24:39,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:39,344 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:39,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:24:39,345 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-09-21 11:24:39,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:39,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716870874] [2020-09-21 11:24:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,605 FATAL L256 erpolLogProxyWrapper]: Difference in size: 2 [2020-09-21 11:24:39,605 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -11 [2020-09-21 11:24:39,606 FATAL L256 erpolLogProxyWrapper]: Difference in width: 11 [2020-09-21 11:24:39,606 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 11:24:39,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-21 11:24:39,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:24:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:24:39,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:24:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:40,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:40,080 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:40,080 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:40,081 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:40,081 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:40,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:40,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:40,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:40,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:40,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:40,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:24:40,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716870874] [2020-09-21 11:24:40,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:40,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:24:40,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383829397] [2020-09-21 11:24:40,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:24:40,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:40,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:24:40,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:24:40,096 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 12 states. [2020-09-21 11:24:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:41,004 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-09-21 11:24:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:24:41,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-21 11:24:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:41,006 INFO L225 Difference]: With dead ends: 118 [2020-09-21 11:24:41,006 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 11:24:41,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:24:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 11:24:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2020-09-21 11:24:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 11:24:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2020-09-21 11:24:41,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 41 [2020-09-21 11:24:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:41,014 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2020-09-21 11:24:41,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:24:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2020-09-21 11:24:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:24:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:41,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:41,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:24:41,016 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-09-21 11:24:41,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:41,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826103628] [2020-09-21 11:24:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:24:41,061 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:24:41,062 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:24:41,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:24:41,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:24:41 BoogieIcfgContainer [2020-09-21 11:24:41,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:24:41,093 INFO L168 Benchmark]: Toolchain (without parser) took 11286.53 ms. Allocated memory was 143.1 MB in the beginning and 309.3 MB in the end (delta: 166.2 MB). Free memory was 105.5 MB in the beginning and 126.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 144.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:41,094 INFO L168 Benchmark]: CDTParser took 0.82 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:24:41,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 769.93 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 104.8 MB in the beginning and 170.7 MB in the end (delta: -65.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:41,095 INFO L168 Benchmark]: Boogie Preprocessor took 82.14 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 167.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:41,096 INFO L168 Benchmark]: RCFGBuilder took 875.15 ms. Allocated memory is still 204.5 MB. Free memory was 167.0 MB in the beginning and 110.2 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:41,096 INFO L168 Benchmark]: TraceAbstraction took 9548.97 ms. Allocated memory was 204.5 MB in the beginning and 309.3 MB in the end (delta: 104.9 MB). Free memory was 110.2 MB in the beginning and 126.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 88.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:41,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.82 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 769.93 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 104.8 MB in the beginning and 170.7 MB in the end (delta: -65.9 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.14 ms. Allocated memory is still 204.5 MB. Free memory was 170.1 MB in the beginning and 167.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 875.15 ms. Allocated memory is still 204.5 MB. Free memory was 167.0 MB in the beginning and 110.2 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9548.97 ms. Allocated memory was 204.5 MB in the beginning and 309.3 MB in the end (delta: 104.9 MB). Free memory was 110.2 MB in the beginning and 126.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 88.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 796 SDtfs, 510 SDslu, 2831 SDs, 0 SdLazy, 2585 SolverSat, 214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 518 NumberOfCodeBlocks, 518 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 463 ConstructedInterpolants, 0 QuantifiedInterpolants, 95270 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 22/60 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...