/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:12:49,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:12:49,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:12:49,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:12:49,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:12:49,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:12:49,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:12:49,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:12:49,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:12:49,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:12:49,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:12:49,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:12:49,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:12:49,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:12:49,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:12:49,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:12:49,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:12:49,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:12:49,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:12:49,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:12:49,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:12:49,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:12:49,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:12:49,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:12:49,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:12:49,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:12:49,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:12:49,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:12:49,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:12:49,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:12:49,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:12:49,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:12:49,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:12:49,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:12:49,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:12:49,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:12:49,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:12:49,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:12:49,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:12:49,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:12:49,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:12:49,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:12:49,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:12:49,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:12:49,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:12:49,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:12:49,245 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:12:49,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:12:49,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:12:49,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:12:49,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:12:49,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:12:49,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:12:49,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:12:49,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:12:49,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:12:49,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:12:49,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:12:49,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:12:49,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:12:49,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:12:49,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:12:49,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:12:49,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:12:49,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:12:49,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:12:49,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:12:49,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:12:49,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:12:49,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:12:49,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:12:49,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:12:49,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:12:49,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:12:49,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:12:49,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:12:49,790 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:12:49,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-25 11:12:49,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/338386f45/84b9af5f2564439fb4a512564e59198a/FLAGc5d663f33 [2020-09-25 11:12:50,536 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:12:50,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-25 11:12:50,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/338386f45/84b9af5f2564439fb4a512564e59198a/FLAGc5d663f33 [2020-09-25 11:12:50,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/338386f45/84b9af5f2564439fb4a512564e59198a [2020-09-25 11:12:50,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:12:50,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:12:50,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:12:50,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:12:50,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:12:50,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:12:50" (1/1) ... [2020-09-25 11:12:50,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3cba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:50, skipping insertion in model container [2020-09-25 11:12:50,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:12:50" (1/1) ... [2020-09-25 11:12:50,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:12:50,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:12:51,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:12:51,415 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:12:51,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:12:51,518 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:12:51,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51 WrapperNode [2020-09-25 11:12:51,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:12:51,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:12:51,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:12:51,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:12:51,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... [2020-09-25 11:12:51,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:12:51,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:12:51,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:12:51,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:12:51,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:12:51,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:12:51,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:12:51,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 11:12:51,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 11:12:51,676 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 11:12:51,676 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-09-25 11:12:51,677 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-25 11:12:51,677 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2020-09-25 11:12:51,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:12:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:12:51,677 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 11:12:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 11:12:51,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 11:12:51,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 11:12:51,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 11:12:51,679 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 11:12:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 11:12:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 11:12:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 11:12:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 11:12:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 11:12:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 11:12:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 11:12:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 11:12:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 11:12:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 11:12:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 11:12:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 11:12:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 11:12:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 11:12:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 11:12:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 11:12:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 11:12:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 11:12:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 11:12:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 11:12:51,692 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 11:12:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 11:12:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 11:12:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:12:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:12:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 11:12:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-25 11:12:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:12:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:12:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 11:12:52,071 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 11:12:52,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:12:52,338 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 11:12:52,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:12:52 BoogieIcfgContainer [2020-09-25 11:12:52,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:12:52,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:12:52,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:12:52,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:12:52,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:12:50" (1/3) ... [2020-09-25 11:12:52,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1ccae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:12:52, skipping insertion in model container [2020-09-25 11:12:52,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:12:51" (2/3) ... [2020-09-25 11:12:52,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1ccae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:12:52, skipping insertion in model container [2020-09-25 11:12:52,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:12:52" (3/3) ... [2020-09-25 11:12:52,367 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2020-09-25 11:12:52,380 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:12:52,391 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:12:52,415 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:12:52,452 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:12:52,452 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:12:52,452 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:12:52,452 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:12:52,452 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:12:52,453 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:12:52,453 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:12:52,453 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:12:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-09-25 11:12:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:12:52,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:52,495 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] [2020-09-25 11:12:52,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1728925643, now seen corresponding path program 1 times [2020-09-25 11:12:52,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:52,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215044396] [2020-09-25 11:12:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:52,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:52,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:53,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:53,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:53,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:12:53,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:12:53,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-09-25 11:12:53,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:53,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:12:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:12:53,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 11:12:53,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:12:53,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:53,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:53,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:53,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:53,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:53,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 11:12:53,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:53,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:53,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:53,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:53,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:53,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:53,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:12:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:53,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:53,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:53,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:12:53,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:53,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 11:12:53,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:53,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:12:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 11:12:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:12:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:12:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:12:53,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215044396] [2020-09-25 11:12:53,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:53,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 11:12:53,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403645939] [2020-09-25 11:12:53,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:12:53,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:12:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:12:53,629 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 7 states. [2020-09-25 11:12:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:54,014 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-25 11:12:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:12:54,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 11:12:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:54,029 INFO L225 Difference]: With dead ends: 129 [2020-09-25 11:12:54,029 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 11:12:54,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:12:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 11:12:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-09-25 11:12:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 11:12:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-25 11:12:54,093 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 27 [2020-09-25 11:12:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:54,094 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-25 11:12:54,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:12:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-25 11:12:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 11:12:54,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:54,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:54,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:12:54,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1632096868, now seen corresponding path program 1 times [2020-09-25 11:12:54,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:54,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451454341] [2020-09-25 11:12:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:54,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:54,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:55,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 11:12:55,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:12:55,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-09-25 11:12:55,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:55,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:12:55,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:12:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:12:55,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:12:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:55,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:55,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:12:55,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:12:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:12:55,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:12:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:12:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:12:55,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:12:55,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:12:55,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-09-25 11:12:55,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:12:55,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:12:55,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:12:55,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:12:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:12:55,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:12:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:12:55,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451454341] [2020-09-25 11:12:55,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:12:55,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 11:12:55,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873087367] [2020-09-25 11:12:55,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:12:55,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:12:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:12:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:12:55,322 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 6 states. [2020-09-25 11:12:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:12:55,541 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-09-25 11:12:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:12:55,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-09-25 11:12:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:12:55,544 INFO L225 Difference]: With dead ends: 71 [2020-09-25 11:12:55,544 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 11:12:55,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:12:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 11:12:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-09-25 11:12:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 11:12:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-25 11:12:55,571 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 39 [2020-09-25 11:12:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:12:55,573 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-25 11:12:55,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:12:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-25 11:12:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 11:12:55,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:12:55,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:12:55,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:12:55,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:12:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:12:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1675692718, now seen corresponding path program 1 times [2020-09-25 11:12:55,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:12:55,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017342867] [2020-09-25 11:12:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:12:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:12:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:55,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:56,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:12:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:00,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:13:00,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:13:00,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 11:13:00,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:00,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:00,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:00,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:00,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:13:00,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:00,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:00,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:00,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:00,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:00,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:00,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:13:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:00,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:13:00,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-25 11:13:00,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:00,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:00,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 11:13:00,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:00,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:13:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:00,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:00,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:00,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:00,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:00,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 11:13:00,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:00,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:00,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:00,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:00,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:13:00,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:00,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017342867] [2020-09-25 11:13:00,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:00,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:13:00,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876160759] [2020-09-25 11:13:00,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:13:00,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:13:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:13:00,961 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 9 states. [2020-09-25 11:13:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:01,238 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-09-25 11:13:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:13:01,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-09-25 11:13:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:01,241 INFO L225 Difference]: With dead ends: 73 [2020-09-25 11:13:01,241 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 11:13:01,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:13:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 11:13:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-09-25 11:13:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-25 11:13:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-09-25 11:13:01,253 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 57 [2020-09-25 11:13:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:01,254 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-09-25 11:13:01,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:13:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-09-25 11:13:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 11:13:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:01,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:01,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:13:01,257 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash -182223992, now seen corresponding path program 2 times [2020-09-25 11:13:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:01,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701597252] [2020-09-25 11:13:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:01,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:01,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:02,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:06,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:06,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 11:13:06,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:13:06,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 11:13:06,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:06,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:06,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 11:13:06,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 11:13:06,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 11:13:06,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:06,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:06,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:13:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:06,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:06,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:06,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:13:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:06,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:06,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:06,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:06,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:13:06,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:06,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-09-25 11:13:06,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:06,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:13:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:06,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 11:13:06,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:13:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:07,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:07,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:07,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:07,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-25 11:13:07,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:07,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:07,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:13:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:07,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:13:07,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 11:13:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:07,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:07,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:07,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:07,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-25 11:13:07,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:07,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:07,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:13:07,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:07,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 11:13:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 11:13:07,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701597252] [2020-09-25 11:13:07,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:07,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:13:07,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236418022] [2020-09-25 11:13:07,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:13:07,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:13:07,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:13:07,371 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 16 states. [2020-09-25 11:13:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:08,459 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2020-09-25 11:13:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 11:13:08,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-09-25 11:13:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:08,466 INFO L225 Difference]: With dead ends: 174 [2020-09-25 11:13:08,467 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 11:13:08,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2020-09-25 11:13:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 11:13:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 78. [2020-09-25 11:13:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 11:13:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-25 11:13:08,493 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 75 [2020-09-25 11:13:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:08,494 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-25 11:13:08,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:13:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-25 11:13:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 11:13:08,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:08,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:08,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:13:08,497 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1080115579, now seen corresponding path program 1 times [2020-09-25 11:13:08,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:08,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519321611] [2020-09-25 11:13:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:08,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:08,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 11:13:09,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:09,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-09-25 11:13:09,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:13:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:13:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 11:13:09,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:13:09,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:09,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:13:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:09,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:13:09,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-25 11:13:09,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:13:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:13:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:09,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-25 11:13:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:09,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:09,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:13:09,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:13:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:09,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-25 11:13:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:09,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:09,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 11:13:09,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:13:09,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:09,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 11:13:09,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:09,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 11:13:09,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519321611] [2020-09-25 11:13:09,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:09,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:13:09,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473859875] [2020-09-25 11:13:09,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:13:09,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:09,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:13:09,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:13:09,926 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-09-25 11:13:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:10,343 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2020-09-25 11:13:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 11:13:10,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-09-25 11:13:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:10,346 INFO L225 Difference]: With dead ends: 141 [2020-09-25 11:13:10,346 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 11:13:10,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:13:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 11:13:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2020-09-25 11:13:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 11:13:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-09-25 11:13:10,358 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 76 [2020-09-25 11:13:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:10,359 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-09-25 11:13:10,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:13:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-09-25 11:13:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-25 11:13:10,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:10,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:10,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:13:10,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1382895989, now seen corresponding path program 2 times [2020-09-25 11:13:10,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:10,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473800235] [2020-09-25 11:13:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:10,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:10,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:12,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:13,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:13,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:15,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:15,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-25 11:13:15,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:13:15,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 11:13:15,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:15,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 11:13:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 11:13:15,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 11:13:15,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:15,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:15,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:13:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:15,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:13:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:15,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:15,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:15,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:17,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:17,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 11:13:17,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:13:17,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-09-25 11:13:17,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:17,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:17,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:13:17,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:17,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 11:13:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:17,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 11:13:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:17,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:17,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:17,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:17,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:17,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 11:13:17,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:17,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:13:17,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:13:17,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:13:17,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:17,728 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-09-25 11:13:17,996 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-09-25 11:13:18,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-25 11:13:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:18,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 11:13:18,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:18,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-25 11:13:18,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:18,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:18,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:13:18,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:13:18,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:13:18,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:13:18,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473800235] [2020-09-25 11:13:18,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:18,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 11:13:18,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460067895] [2020-09-25 11:13:18,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 11:13:18,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 11:13:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-09-25 11:13:18,493 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 22 states. [2020-09-25 11:13:19,528 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-09-25 11:13:20,827 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-09-25 11:13:20,973 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-09-25 11:13:21,158 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-25 11:13:21,326 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-09-25 11:13:21,942 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-09-25 11:13:22,200 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-09-25 11:13:22,541 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-09-25 11:13:22,689 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-09-25 11:13:23,521 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-09-25 11:13:23,891 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2020-09-25 11:13:24,075 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-09-25 11:13:24,235 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-09-25 11:13:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:24,460 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-09-25 11:13:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 11:13:24,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-09-25 11:13:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:24,462 INFO L225 Difference]: With dead ends: 171 [2020-09-25 11:13:24,462 INFO L226 Difference]: Without dead ends: 115 [2020-09-25 11:13:24,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=715, Invalid=3977, Unknown=0, NotChecked=0, Total=4692 [2020-09-25 11:13:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-25 11:13:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-25 11:13:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 11:13:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-09-25 11:13:24,477 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 88 [2020-09-25 11:13:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:24,477 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-09-25 11:13:24,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 11:13:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-09-25 11:13:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 11:13:24,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:24,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:24,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:13:24,480 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash 131916194, now seen corresponding path program 1 times [2020-09-25 11:13:24,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:24,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838570] [2020-09-25 11:13:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:26,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:28,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:29,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:13:29,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:13:29,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5366 [2020-09-25 11:13:29,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:29,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-25 11:13:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 11:13:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 11:13:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:30,410 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-09-25 11:13:30,569 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-09-25 11:13:30,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 11:13:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:31,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:31,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 11:13:31,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:13:31,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-25 11:13:31,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:31,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:13:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 11:13:31,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:32,129 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-09-25 11:13:32,513 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-09-25 11:13:32,932 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-09-25 11:13:33,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 11:13:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:33,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:33,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:33,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 11:13:33,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:33,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-09-25 11:13:33,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:33,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 11:13:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:13:33,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:13:33,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:34,457 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-09-25 11:13:34,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 11:13:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:34,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:34,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:34,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 11:13:34,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:34,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-25 11:13:34,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:34,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:13:34,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:13:34,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:13:34,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 11:13:34,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838570] [2020-09-25 11:13:34,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:34,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 11:13:34,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775377517] [2020-09-25 11:13:34,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 11:13:34,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 11:13:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:13:34,873 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 27 states. [2020-09-25 11:13:35,744 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-09-25 11:13:35,936 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-09-25 11:13:36,332 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-25 11:13:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:38,010 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2020-09-25 11:13:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 11:13:38,010 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2020-09-25 11:13:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:38,015 INFO L225 Difference]: With dead ends: 170 [2020-09-25 11:13:38,015 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 11:13:38,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 11:13:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 11:13:38,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-09-25 11:13:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-25 11:13:38,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-09-25 11:13:38,035 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 89 [2020-09-25 11:13:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:38,036 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-09-25 11:13:38,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 11:13:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-09-25 11:13:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 11:13:38,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:38,038 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:38,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:13:38,038 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1453437036, now seen corresponding path program 1 times [2020-09-25 11:13:38,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:38,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774580637] [2020-09-25 11:13:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:38,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking...