/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=LOWLEXORDER --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-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:36:32,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:36:32,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:36:32,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:36:32,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:36:32,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:36:32,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:36:32,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:36:32,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:36:32,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:36:32,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:36:32,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:36:32,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:36:32,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:36:32,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:36:32,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:36:32,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:36:32,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:36:32,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:36:32,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:36:32,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:36:32,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:36:32,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:36:32,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:36:32,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:36:32,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:36:32,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:36:32,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:36:32,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:36:32,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:36:32,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:36:32,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:36:32,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:36:32,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:36:32,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:36:32,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:36:32,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:36:32,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:36:32,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:36:32,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:36:32,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:36:32,149 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 [2020-09-24 21:36:32,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:36:32,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:36:32,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:36:32,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:36:32,177 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:36:32,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:36:32,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:36:32,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:36:32,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:36:32,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:36:32,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:36:32,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:36:32,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:36:32,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:36:32,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:36:32,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:36:32,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:36:32,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:36:32,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:36:32,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:36:32,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:36:32,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:36:32,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:36:32,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:36:32,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:36:32,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:36:32,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:36:32,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:36:32,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:36:32,182 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:36:32,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:36:32,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:36:32,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:36:32,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:36:32,669 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:36:32,670 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 21:36:32,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09e72dde5/50d9ba7ce03745fb9d7d53776345ce74/FLAG1082d8fbe [2020-09-24 21:36:33,326 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:36:33,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-24 21:36:33,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09e72dde5/50d9ba7ce03745fb9d7d53776345ce74/FLAG1082d8fbe [2020-09-24 21:36:33,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09e72dde5/50d9ba7ce03745fb9d7d53776345ce74 [2020-09-24 21:36:33,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:36:33,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:36:33,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:36:33,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:36:33,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:36:33,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:33" (1/1) ... [2020-09-24 21:36:33,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce2d4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:33, skipping insertion in model container [2020-09-24 21:36:33,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:36:33" (1/1) ... [2020-09-24 21:36:33,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:36:33,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:36:34,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:36:34,135 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:36:34,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:36:34,259 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:36:34,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34 WrapperNode [2020-09-24 21:36:34,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:36:34,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:36:34,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:36:34,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:36:34,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (1/1) ... [2020-09-24 21:36:34,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:36:34,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:36:34,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:36:34,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:36:34,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (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 [2020-09-24 21:36:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:36:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:36:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 21:36:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 21:36:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 21:36:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 21:36:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 21:36:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 21:36:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 21:36:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 21:36:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 21:36:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 21:36:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 21:36:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 21:36:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-24 21:36:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 21:36:34,429 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 21:36:34,430 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 21:36:34,431 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 21:36:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 21:36:34,433 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:36:34,434 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 21:36:34,435 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:36:34,436 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 21:36:34,437 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 21:36:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 21:36:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 21:36:34,440 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 21:36:34,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:36:34,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:36:34,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:36:34,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:36:34,765 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 21:36:34,953 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:36:34,953 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 21:36:34,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:34 BoogieIcfgContainer [2020-09-24 21:36:34,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:36:34,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:36:34,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:36:34,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:36:34,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:36:33" (1/3) ... [2020-09-24 21:36:34,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59526aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:34, skipping insertion in model container [2020-09-24 21:36:34,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:36:34" (2/3) ... [2020-09-24 21:36:34,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59526aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:36:34, skipping insertion in model container [2020-09-24 21:36:34,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:36:34" (3/3) ... [2020-09-24 21:36:34,967 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-24 21:36:34,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:36:34,989 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:36:35,011 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:36:35,048 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:36:35,048 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:36:35,048 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:36:35,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:36:35,049 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:36:35,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:36:35,049 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:36:35,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:36:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-24 21:36:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 21:36:35,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:35,085 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] [2020-09-24 21:36:35,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1227115345, now seen corresponding path program 1 times [2020-09-24 21:36:35,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:35,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491242610] [2020-09-24 21:36:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:35,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:35,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 21:36:35,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:36:35,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 587 [2020-09-24 21:36:35,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:36:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:36:35,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:36:35,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:36:35,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:35,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:35,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:35,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:35,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:35,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:35,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:35,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:35,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:35,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:35,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:35,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491242610] [2020-09-24 21:36:35,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:35,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:36:35,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968182397] [2020-09-24 21:36:35,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:36:35,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:36:36,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:36:36,018 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 7 states. [2020-09-24 21:36:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:36,393 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions. [2020-09-24 21:36:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:36:36,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-24 21:36:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:36,407 INFO L225 Difference]: With dead ends: 198 [2020-09-24 21:36:36,408 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 21:36:36,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:36:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 21:36:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2020-09-24 21:36:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 21:36:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-09-24 21:36:36,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 22 [2020-09-24 21:36:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:36,469 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-09-24 21:36:36,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:36:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-09-24 21:36:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:36:36,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:36,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:36,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:36:36,472 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:36,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1213729417, now seen corresponding path program 1 times [2020-09-24 21:36:36,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:36,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736174977] [2020-09-24 21:36:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:36,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:36,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:36,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:36:36,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:36,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-24 21:36:36,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:36:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:36:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:36:36,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:36,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:36,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:36,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:36,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:36,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:36,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:36:36,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:36,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:36,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736174977] [2020-09-24 21:36:36,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:36,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:36:36,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560926653] [2020-09-24 21:36:36,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:36:36,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:36:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:36:36,720 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2020-09-24 21:36:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:36,968 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-09-24 21:36:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:36:36,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 21:36:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:36,971 INFO L225 Difference]: With dead ends: 137 [2020-09-24 21:36:36,972 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 21:36:36,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:36:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 21:36:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 67. [2020-09-24 21:36:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 21:36:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-09-24 21:36:36,983 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2020-09-24 21:36:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:36,984 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-09-24 21:36:36,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:36:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-09-24 21:36:36,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:36:36,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:36,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:36,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:36:36,986 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2044556103, now seen corresponding path program 1 times [2020-09-24 21:36:36,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:36,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429045039] [2020-09-24 21:36:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:37,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:37,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:37,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 21:36:37,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:37,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-24 21:36:37,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:36:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:36:37,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:36:37,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:37,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:37,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:37,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:37,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:37,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:37,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:36:37,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:37,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:37,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:37,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429045039] [2020-09-24 21:36:37,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:36:37,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:36:37,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351366382] [2020-09-24 21:36:37,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:36:37,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:36:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:36:37,274 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-09-24 21:36:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:37,480 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-09-24 21:36:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:36:37,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-24 21:36:37,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:37,482 INFO L225 Difference]: With dead ends: 119 [2020-09-24 21:36:37,482 INFO L226 Difference]: Without dead ends: 95 [2020-09-24 21:36:37,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:36:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-24 21:36:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2020-09-24 21:36:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:36:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 21:36:37,494 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 36 [2020-09-24 21:36:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:37,494 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 21:36:37,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:36:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 21:36:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:36:37,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:37,500 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:37,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:36:37,500 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash -833752717, now seen corresponding path program 1 times [2020-09-24 21:36:37,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:37,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363710653] [2020-09-24 21:36:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:37,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:38,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:38,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:36:38,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:38,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-09-24 21:36:38,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:36:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:38,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:36:38,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:38,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:39,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:39,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:39,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:39,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:39,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:36:39,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:39,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:39,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:39,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:39,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:39,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363710653] [2020-09-24 21:36:39,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:39,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:36:39,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006250993] [2020-09-24 21:36:39,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:36:39,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:39,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:36:39,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:36:39,035 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-09-24 21:36:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:39,887 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2020-09-24 21:36:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:36:39,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-24 21:36:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:39,890 INFO L225 Difference]: With dead ends: 157 [2020-09-24 21:36:39,890 INFO L226 Difference]: Without dead ends: 144 [2020-09-24 21:36:39,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:36:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-24 21:36:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2020-09-24 21:36:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 21:36:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-24 21:36:39,910 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 41 [2020-09-24 21:36:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:39,910 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-24 21:36:39,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:36:39,914 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-24 21:36:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:36:39,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:39,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:39,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:36:39,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:39,919 INFO L82 PathProgramCache]: Analyzing trace with hash 865863745, now seen corresponding path program 1 times [2020-09-24 21:36:39,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:39,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349547914] [2020-09-24 21:36:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:40,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:36:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-09-24 21:36:40,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:36:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 21:36:40,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:36:41,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:41,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:41,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:41,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:41,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:41,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:36:41,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:41,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:41,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:41,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:41,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:41,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349547914] [2020-09-24 21:36:41,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:41,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:36:41,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556294950] [2020-09-24 21:36:41,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:36:41,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:36:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:36:41,243 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-24 21:36:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:42,144 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2020-09-24 21:36:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:36:42,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-24 21:36:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:42,146 INFO L225 Difference]: With dead ends: 181 [2020-09-24 21:36:42,146 INFO L226 Difference]: Without dead ends: 175 [2020-09-24 21:36:42,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:36:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-24 21:36:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2020-09-24 21:36:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 21:36:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-24 21:36:42,155 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 41 [2020-09-24 21:36:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:42,156 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-24 21:36:42,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:36:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-24 21:36:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:36:42,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:42,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:42,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:36:42,158 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1077832869, now seen corresponding path program 1 times [2020-09-24 21:36:42,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:42,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837498225] [2020-09-24 21:36:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:42,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:42,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:42,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 21:36:42,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:42,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-09-24 21:36:42,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:36:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:36:42,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:42,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:42,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:42,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:42,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:42,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:42,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:36:42,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:42,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:42,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837498225] [2020-09-24 21:36:42,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:42,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:36:42,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662100539] [2020-09-24 21:36:42,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:36:42,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:36:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:42,982 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 16 states. [2020-09-24 21:36:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:43,956 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-09-24 21:36:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:36:43,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 21:36:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:43,958 INFO L225 Difference]: With dead ends: 165 [2020-09-24 21:36:43,959 INFO L226 Difference]: Without dead ends: 159 [2020-09-24 21:36:43,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:36:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-24 21:36:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2020-09-24 21:36:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 21:36:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-24 21:36:43,979 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 47 [2020-09-24 21:36:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:43,979 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-24 21:36:43,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:36:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-24 21:36:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:36:43,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:43,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:43,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:36:43,983 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:43,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1893706375, now seen corresponding path program 1 times [2020-09-24 21:36:43,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:43,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156603867] [2020-09-24 21:36:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:44,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:44,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 21:36:44,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:44,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-09-24 21:36:44,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:36:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:44,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:36:44,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:45,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:45,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:45,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:45,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:45,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:36:45,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:45,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:36:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:45,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156603867] [2020-09-24 21:36:45,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:45,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:36:45,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013990825] [2020-09-24 21:36:45,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:36:45,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:45,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:36:45,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:45,050 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 16 states. [2020-09-24 21:36:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:46,343 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2020-09-24 21:36:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:36:46,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 21:36:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:46,345 INFO L225 Difference]: With dead ends: 179 [2020-09-24 21:36:46,345 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 21:36:46,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:36:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 21:36:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-09-24 21:36:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 21:36:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-24 21:36:46,354 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-24 21:36:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:46,355 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-24 21:36:46,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:36:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-24 21:36:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:36:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:46,356 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:46,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:36:46,357 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -857024599, now seen corresponding path program 1 times [2020-09-24 21:36:46,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:46,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173808543] [2020-09-24 21:36:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:46,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:47,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:47,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 21:36:47,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:47,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-09-24 21:36:47,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:36:47,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:36:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:47,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:47,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:47,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:47,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:47,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:36:47,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:47,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:47,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:47,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173808543] [2020-09-24 21:36:47,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:47,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:36:47,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063412184] [2020-09-24 21:36:47,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:36:47,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:47,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:36:47,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:47,726 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 16 states. [2020-09-24 21:36:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:48,817 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2020-09-24 21:36:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:36:48,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-09-24 21:36:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:48,819 INFO L225 Difference]: With dead ends: 188 [2020-09-24 21:36:48,820 INFO L226 Difference]: Without dead ends: 182 [2020-09-24 21:36:48,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:36:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-24 21:36:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113. [2020-09-24 21:36:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 21:36:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2020-09-24 21:36:48,828 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 47 [2020-09-24 21:36:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:48,828 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2020-09-24 21:36:48,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:36:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2020-09-24 21:36:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:36:48,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:48,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:48,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:36:48,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:48,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:48,830 INFO L82 PathProgramCache]: Analyzing trace with hash 294895633, now seen corresponding path program 2 times [2020-09-24 21:36:48,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:48,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931353532] [2020-09-24 21:36:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:48,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:49,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:50,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:50,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:36:50,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-09-24 21:36:50,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:36:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:50,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:36:50,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:36:50,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:50,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:50,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:50,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:50,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:36:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:50,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:50,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:50,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931353532] [2020-09-24 21:36:50,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:50,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:36:50,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675233965] [2020-09-24 21:36:50,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:36:50,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:36:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:36:50,985 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 20 states. [2020-09-24 21:36:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:51,905 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2020-09-24 21:36:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:36:51,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-09-24 21:36:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:51,908 INFO L225 Difference]: With dead ends: 190 [2020-09-24 21:36:51,908 INFO L226 Difference]: Without dead ends: 177 [2020-09-24 21:36:51,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:36:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-24 21:36:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 129. [2020-09-24 21:36:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-24 21:36:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-09-24 21:36:51,918 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 52 [2020-09-24 21:36:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:51,919 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-09-24 21:36:51,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:36:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-09-24 21:36:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:36:51,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:51,920 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:51,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:36:51,920 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1689189507, now seen corresponding path program 1 times [2020-09-24 21:36:51,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:51,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173063321] [2020-09-24 21:36:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:51,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:52,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:53,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:53,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:36:53,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:53,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-09-24 21:36:53,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:53,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:36:53,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:53,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:36:53,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:53,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:53,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:53,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:53,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:53,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:36:53,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:53,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:53,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:53,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:53,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:53,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173063321] [2020-09-24 21:36:53,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:53,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:36:53,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674101270] [2020-09-24 21:36:53,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:36:53,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:53,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:36:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:36:53,544 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 20 states. [2020-09-24 21:36:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:54,704 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions. [2020-09-24 21:36:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:36:54,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-09-24 21:36:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:54,706 INFO L225 Difference]: With dead ends: 232 [2020-09-24 21:36:54,706 INFO L226 Difference]: Without dead ends: 226 [2020-09-24 21:36:54,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=1450, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:36:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-24 21:36:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2020-09-24 21:36:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-24 21:36:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-09-24 21:36:54,717 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 52 [2020-09-24 21:36:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:54,717 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-09-24 21:36:54,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:36:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-09-24 21:36:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 21:36:54,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:54,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:36:54,719 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -906161327, now seen corresponding path program 2 times [2020-09-24 21:36:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:54,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704611601] [2020-09-24 21:36:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:56,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:56,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 21:36:56,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:36:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-09-24 21:36:56,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:36:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:36:56,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:56,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:56,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:56,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:56,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:36:56,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:56,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:56,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:56,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:56,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:56,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704611601] [2020-09-24 21:36:56,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:56,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:36:56,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215688558] [2020-09-24 21:36:56,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:36:56,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:36:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:36:56,772 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 20 states. [2020-09-24 21:36:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:36:58,140 INFO L93 Difference]: Finished difference Result 245 states and 264 transitions. [2020-09-24 21:36:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:36:58,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-09-24 21:36:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:36:58,142 INFO L225 Difference]: With dead ends: 245 [2020-09-24 21:36:58,142 INFO L226 Difference]: Without dead ends: 239 [2020-09-24 21:36:58,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:36:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-24 21:36:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145. [2020-09-24 21:36:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-24 21:36:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2020-09-24 21:36:58,151 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 52 [2020-09-24 21:36:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:36:58,151 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2020-09-24 21:36:58,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:36:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2020-09-24 21:36:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:36:58,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:36:58,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:36:58,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:36:58,153 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:36:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:36:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash 219391251, now seen corresponding path program 1 times [2020-09-24 21:36:58,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:36:58,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103058752] [2020-09-24 21:36:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:36:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:58,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:58,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:36:58,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:58,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-09-24 21:36:58,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:36:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:36:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:36:58,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:58,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:36:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:36:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:36:58,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:36:58,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:36:58,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:36:58,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:36:58,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:36:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:36:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:36:58,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:36:58,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:36:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:36:58,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103058752] [2020-09-24 21:36:58,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:36:58,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:36:58,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138814283] [2020-09-24 21:36:58,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:36:58,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:36:58,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:36:58,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:36:58,928 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 16 states. [2020-09-24 21:37:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:00,044 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2020-09-24 21:37:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:37:00,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 21:37:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:00,046 INFO L225 Difference]: With dead ends: 218 [2020-09-24 21:37:00,046 INFO L226 Difference]: Without dead ends: 203 [2020-09-24 21:37:00,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:37:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-24 21:37:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2020-09-24 21:37:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-24 21:37:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2020-09-24 21:37:00,066 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 53 [2020-09-24 21:37:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:00,066 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2020-09-24 21:37:00,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2020-09-24 21:37:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:37:00,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:00,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:00,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:37:00,068 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1256073027, now seen corresponding path program 2 times [2020-09-24 21:37:00,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:00,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808066929] [2020-09-24 21:37:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:00,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:00,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:37:00,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:00,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-09-24 21:37:00,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:37:00,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:37:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:00,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:00,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:00,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:00,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:00,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:00,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:00,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:00,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:00,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808066929] [2020-09-24 21:37:00,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:00,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:37:00,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653750415] [2020-09-24 21:37:00,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:37:00,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:37:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:00,807 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand 16 states. [2020-09-24 21:37:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:01,829 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2020-09-24 21:37:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:37:01,830 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 21:37:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:01,831 INFO L225 Difference]: With dead ends: 200 [2020-09-24 21:37:01,832 INFO L226 Difference]: Without dead ends: 170 [2020-09-24 21:37:01,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:37:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-24 21:37:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2020-09-24 21:37:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-24 21:37:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2020-09-24 21:37:01,842 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 53 [2020-09-24 21:37:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:01,842 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2020-09-24 21:37:01,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2020-09-24 21:37:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:37:01,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:01,843 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:01,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:37:01,843 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash 164878513, now seen corresponding path program 2 times [2020-09-24 21:37:01,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:01,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505828878] [2020-09-24 21:37:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:01,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:02,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:02,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:37:02,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:02,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-09-24 21:37:02,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:37:02,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:37:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:02,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:02,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:02,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:02,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:02,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:02,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:02,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:02,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:02,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505828878] [2020-09-24 21:37:02,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:02,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:37:02,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954177325] [2020-09-24 21:37:02,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:37:02,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:37:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:02,596 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand 16 states. [2020-09-24 21:37:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:03,695 INFO L93 Difference]: Finished difference Result 211 states and 225 transitions. [2020-09-24 21:37:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:37:03,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 21:37:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:03,697 INFO L225 Difference]: With dead ends: 211 [2020-09-24 21:37:03,697 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 21:37:03,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:37:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 21:37:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2020-09-24 21:37:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-24 21:37:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-09-24 21:37:03,705 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 53 [2020-09-24 21:37:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:03,706 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-09-24 21:37:03,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-09-24 21:37:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:37:03,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:03,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:03,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:37:03,707 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash 492828385, now seen corresponding path program 1 times [2020-09-24 21:37:03,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:03,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281442557] [2020-09-24 21:37:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:03,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:03,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:04,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:04,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:37:04,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:04,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-09-24 21:37:04,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:37:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:37:04,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:05,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:05,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:05,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:05,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:05,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:05,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:05,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:05,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:05,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:05,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:05,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:05,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281442557] [2020-09-24 21:37:05,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:05,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:37:05,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724846044] [2020-09-24 21:37:05,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:37:05,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:05,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:37:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:05,142 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states. [2020-09-24 21:37:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:06,229 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2020-09-24 21:37:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:37:06,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 21:37:06,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:06,231 INFO L225 Difference]: With dead ends: 205 [2020-09-24 21:37:06,231 INFO L226 Difference]: Without dead ends: 190 [2020-09-24 21:37:06,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:37:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-24 21:37:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2020-09-24 21:37:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-24 21:37:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-09-24 21:37:06,247 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 53 [2020-09-24 21:37:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:06,248 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-09-24 21:37:06,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-09-24 21:37:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 21:37:06,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:06,249 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:06,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:37:06,249 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1529510161, now seen corresponding path program 2 times [2020-09-24 21:37:06,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:06,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434008968] [2020-09-24 21:37:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:06,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:07,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:07,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:37:07,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1155 [2020-09-24 21:37:07,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:07,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:37:07,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:37:07,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:07,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:07,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:07,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:07,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:07,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:07,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:07,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:07,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:07,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434008968] [2020-09-24 21:37:07,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:07,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:37:07,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967857947] [2020-09-24 21:37:07,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:37:07,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:07,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:37:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:07,679 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states. [2020-09-24 21:37:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:08,629 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2020-09-24 21:37:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:37:08,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-09-24 21:37:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:08,631 INFO L225 Difference]: With dead ends: 187 [2020-09-24 21:37:08,631 INFO L226 Difference]: Without dead ends: 157 [2020-09-24 21:37:08,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:37:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-24 21:37:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 124. [2020-09-24 21:37:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 21:37:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-09-24 21:37:08,639 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 53 [2020-09-24 21:37:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:08,639 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-09-24 21:37:08,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:37:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-09-24 21:37:08,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:37:08,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:08,640 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:08,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:37:08,641 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1525845127, now seen corresponding path program 3 times [2020-09-24 21:37:08,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:08,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978101442] [2020-09-24 21:37:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:08,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:09,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:09,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 21:37:09,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:09,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-09-24 21:37:09,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:09,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:37:09,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:37:09,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 21:37:09,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:10,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:10,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:10,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:10,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:10,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978101442] [2020-09-24 21:37:10,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:10,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:37:10,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529370498] [2020-09-24 21:37:10,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:37:10,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:37:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:37:10,325 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 22 states. [2020-09-24 21:37:10,949 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-09-24 21:37:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:12,465 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2020-09-24 21:37:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 21:37:12,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-09-24 21:37:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:12,467 INFO L225 Difference]: With dead ends: 213 [2020-09-24 21:37:12,467 INFO L226 Difference]: Without dead ends: 200 [2020-09-24 21:37:12,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 21:37:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-24 21:37:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-24 21:37:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 21:37:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-09-24 21:37:12,476 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 58 [2020-09-24 21:37:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:12,476 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-09-24 21:37:12,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:37:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-09-24 21:37:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 21:37:12,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:12,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:12,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:37:12,478 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1049071675, now seen corresponding path program 1 times [2020-09-24 21:37:12,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:12,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954088508] [2020-09-24 21:37:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:37:12,497 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:37:12,497 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:37:12,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 21:37:12,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:37:12 BoogieIcfgContainer [2020-09-24 21:37:12,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:37:12,521 INFO L168 Benchmark]: Toolchain (without parser) took 38930.15 ms. Allocated memory was 139.5 MB in the beginning and 484.4 MB in the end (delta: 345.0 MB). Free memory was 101.9 MB in the beginning and 351.6 MB in the end (delta: -249.7 MB). Peak memory consumption was 95.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,522 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.23 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.0 MB in the beginning and 170.1 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,524 INFO L168 Benchmark]: Boogie Preprocessor took 86.48 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,525 INFO L168 Benchmark]: RCFGBuilder took 610.52 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 118.8 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,527 INFO L168 Benchmark]: TraceAbstraction took 37559.91 ms. Allocated memory was 202.9 MB in the beginning and 484.4 MB in the end (delta: 281.5 MB). Free memory was 117.8 MB in the beginning and 351.6 MB in the end (delta: -233.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:37:12,531 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 663.23 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.0 MB in the beginning and 170.1 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 86.48 ms. Allocated memory is still 202.9 MB. Free memory was 170.1 MB in the beginning and 166.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 610.52 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 118.8 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 37559.91 ms. Allocated memory was 202.9 MB in the beginning and 484.4 MB in the end (delta: 281.5 MB). Free memory was 117.8 MB in the beginning and 351.6 MB in the end (delta: -233.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 37.4s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 16.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1020 SDtfs, 4578 SDslu, 8963 SDs, 0 SdLazy, 7780 SolverSat, 736 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 536 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 12.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 983 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 19.4s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 779 ConstructedInterpolants, 0 QuantifiedInterpolants, 400649 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 32/119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...