/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-eb0fd7c [2020-09-21 12:25:53,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:53,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:53,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:53,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:53,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:53,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:53,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:53,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:53,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:53,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:53,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:53,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:53,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:53,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:53,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:53,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:53,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:53,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:53,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:53,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:53,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:53,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:53,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:53,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:53,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:53,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:53,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:53,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:53,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:53,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:53,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:53,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:53,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:53,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:53,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:53,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:53,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:53,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:53,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:53,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:53,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:25:53,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:53,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:53,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:53,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:53,963 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:53,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:53,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:53,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:53,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:53,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:53,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:53,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:53,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:53,966 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:53,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:53,967 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:53,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:53,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:53,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:53,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:53,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:53,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:53,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:53,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:53,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:53,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:53,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:53,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:53,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:53,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:54,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:54,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:54,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:54,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:54,530 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:54,532 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-09-21 12:25:54,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c63b945/a2e33e1c216f464bb16726e4ab7f5acb/FLAG9ce2dc4a5 [2020-09-21 12:25:55,233 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:55,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-09-21 12:25:55,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c63b945/a2e33e1c216f464bb16726e4ab7f5acb/FLAG9ce2dc4a5 [2020-09-21 12:25:55,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45c63b945/a2e33e1c216f464bb16726e4ab7f5acb [2020-09-21 12:25:55,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:55,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:55,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:55,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:55,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:55,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a94298b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:55, skipping insertion in model container [2020-09-21 12:25:55,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:55" (1/1) ... [2020-09-21 12:25:55,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:55,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:56,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:56,151 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:56,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:56,296 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:56,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56 WrapperNode [2020-09-21 12:25:56,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:56,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:56,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:56,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:56,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... [2020-09-21 12:25:56,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:56,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:56,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:56,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:56,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:56,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:25:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:25:56,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 12:25:56,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 12:25:56,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 12:25:56,464 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 12:25:56,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:25:56,466 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:25:56,467 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:25:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:25:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:25:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:25:56,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:25:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:25:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:25:56,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:25:56,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:25:56,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:25:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:25:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:25:56,472 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:25:56,473 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:25:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:25:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:25:56,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:25:56,475 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:25:56,476 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:25:56,477 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:25:56,478 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:25:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:25:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:25:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:25:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:25:56,479 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:25:56,480 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:25:56,481 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:25:56,482 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:25:56,483 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:25:56,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:25:56,485 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:25:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 12:25:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:25:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:25:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:25:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:25:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:25:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:25:56,870 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 12:25:57,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:57,034 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:25:57,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:57 BoogieIcfgContainer [2020-09-21 12:25:57,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:57,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:57,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:57,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:57,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:55" (1/3) ... [2020-09-21 12:25:57,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37142a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:57, skipping insertion in model container [2020-09-21 12:25:57,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:56" (2/3) ... [2020-09-21 12:25:57,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37142a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:57, skipping insertion in model container [2020-09-21 12:25:57,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:57" (3/3) ... [2020-09-21 12:25:57,049 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-09-21 12:25:57,061 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:57,071 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:57,094 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:57,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:57,123 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:57,123 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:57,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:57,123 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:57,123 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:57,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:57,124 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-21 12:25:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 12:25:57,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:57,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:57,153 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-09-21 12:25:57,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:57,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54628024] [2020-09-21 12:25:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:57,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:57,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:25:57,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:25:57,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-09-21 12:25:57,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:57,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:57,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:57,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-21 12:25:57,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:57,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:57,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:57,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:25:57,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:57,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:57,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54628024] [2020-09-21 12:25:57,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:57,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:57,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021744785] [2020-09-21 12:25:57,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:57,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:57,890 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-21 12:25:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:58,010 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-09-21 12:25:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:58,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 12:25:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:58,023 INFO L225 Difference]: With dead ends: 56 [2020-09-21 12:25:58,023 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 12:25:58,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 12:25:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 12:25:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 12:25:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-09-21 12:25:58,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-09-21 12:25:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:58,078 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-09-21 12:25:58,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-09-21 12:25:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:25:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:58,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:58,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:58,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-09-21 12:25:58,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:58,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449340620] [2020-09-21 12:25:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:25:58,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-21 12:25:58,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:25:58,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:58,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:58,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:25:58,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:58,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449340620] [2020-09-21 12:25:58,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:58,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:25:58,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572777514] [2020-09-21 12:25:58,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:25:58,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:25:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:25:58,372 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-09-21 12:25:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:58,535 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-21 12:25:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:25:58,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-21 12:25:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:58,540 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:25:58,540 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:25:58,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:25:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:25:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-09-21 12:25:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 12:25:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-09-21 12:25:58,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-09-21 12:25:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:58,552 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-09-21 12:25:58,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:25:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-09-21 12:25:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:58,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:58,554 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] [2020-09-21 12:25:58,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:58,554 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-09-21 12:25:58,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:58,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128517815] [2020-09-21 12:25:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:58,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-21 12:25:58,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:25:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:58,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:25:58,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:58,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:25:58,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:58,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128517815] [2020-09-21 12:25:58,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:58,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:25:58,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153989147] [2020-09-21 12:25:58,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:25:58,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:58,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:25:58,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:25:58,794 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-09-21 12:25:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:58,990 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-09-21 12:25:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:25:58,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 12:25:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:58,993 INFO L225 Difference]: With dead ends: 52 [2020-09-21 12:25:58,993 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 12:25:58,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:25:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 12:25:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-09-21 12:25:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 12:25:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-09-21 12:25:59,006 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-09-21 12:25:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:59,007 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-09-21 12:25:59,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:25:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-09-21 12:25:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:59,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:59,009 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] [2020-09-21 12:25:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:59,011 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-09-21 12:25:59,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:59,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821737215] [2020-09-21 12:25:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:59,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-21 12:25:59,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:25:59,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:59,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:25:59,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:25:59,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:59,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:25:59,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:59,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:59,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:59,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:59,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821737215] [2020-09-21 12:25:59,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:59,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:25:59,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755300610] [2020-09-21 12:25:59,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:25:59,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:25:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:25:59,314 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-09-21 12:25:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:59,481 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-09-21 12:25:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:25:59,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 12:25:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:59,483 INFO L225 Difference]: With dead ends: 52 [2020-09-21 12:25:59,483 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 12:25:59,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:25:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 12:25:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-09-21 12:25:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:25:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 12:25:59,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-09-21 12:25:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:59,490 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 12:25:59,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:25:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 12:25:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:59,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:59,492 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] [2020-09-21 12:25:59,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:59,493 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:59,493 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-09-21 12:25:59,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:59,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080588477] [2020-09-21 12:25:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:59,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:59,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:59,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:25:59,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-09-21 12:25:59,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:59,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:25:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:25:59,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:25:59,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:00,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:00,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:00,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080588477] [2020-09-21 12:26:00,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:00,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:26:00,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145095500] [2020-09-21 12:26:00,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:26:00,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:26:00,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:00,092 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-09-21 12:26:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:00,344 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 12:26:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:26:00,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 12:26:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:00,345 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:26:00,345 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:26:00,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:26:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-09-21 12:26:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:26:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-09-21 12:26:00,353 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-09-21 12:26:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:00,353 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-09-21 12:26:00,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:26:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-09-21 12:26:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:26:00,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:00,354 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] [2020-09-21 12:26:00,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:26:00,355 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:00,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-09-21 12:26:00,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:00,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608304241] [2020-09-21 12:26:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:00,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:00,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:00,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:26:00,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:26:00,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-09-21 12:26:00,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:26:00,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:00,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:26:00,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:01,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:01,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:26:01,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:01,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:01,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608304241] [2020-09-21 12:26:01,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:01,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:26:01,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722838082] [2020-09-21 12:26:01,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:26:01,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:26:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:26:01,098 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2020-09-21 12:26:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:01,378 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-09-21 12:26:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:26:01,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 12:26:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:01,379 INFO L225 Difference]: With dead ends: 63 [2020-09-21 12:26:01,380 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 12:26:01,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 12:26:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-09-21 12:26:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:26:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-09-21 12:26:01,386 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-09-21 12:26:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:01,386 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-09-21 12:26:01,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:26:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-09-21 12:26:01,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:26:01,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:01,387 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] [2020-09-21 12:26:01,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:26:01,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-09-21 12:26:01,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:01,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111640250] [2020-09-21 12:26:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:26:01,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-09-21 12:26:01,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:26:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:01,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:01,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:01,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:01,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:01,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:26:01,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:01,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:01,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:01,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:01,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111640250] [2020-09-21 12:26:01,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:01,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:01,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966680907] [2020-09-21 12:26:01,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:01,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:01,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:01,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:01,848 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2020-09-21 12:26:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:02,238 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-09-21 12:26:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:02,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-21 12:26:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:02,241 INFO L225 Difference]: With dead ends: 67 [2020-09-21 12:26:02,241 INFO L226 Difference]: Without dead ends: 63 [2020-09-21 12:26:02,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-21 12:26:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-21 12:26:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 12:26:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-09-21 12:26:02,248 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-09-21 12:26:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:02,249 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-09-21 12:26:02,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-09-21 12:26:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:26:02,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:02,250 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] [2020-09-21 12:26:02,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:26:02,251 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-09-21 12:26:02,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:02,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301264734] [2020-09-21 12:26:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:26:02,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-09-21 12:26:02,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:02,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:02,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:26:02,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:02,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:02,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:02,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:02,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:02,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:26:02,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:02,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:02,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301264734] [2020-09-21 12:26:02,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:02,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:02,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24258685] [2020-09-21 12:26:02,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:02,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:02,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:02,854 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 10 states. [2020-09-21 12:26:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:03,255 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-09-21 12:26:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:03,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 12:26:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:03,257 INFO L225 Difference]: With dead ends: 69 [2020-09-21 12:26:03,257 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 12:26:03,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:03,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 12:26:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-09-21 12:26:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 12:26:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-09-21 12:26:03,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-09-21 12:26:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:03,281 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-09-21 12:26:03,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-09-21 12:26:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:26:03,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:03,283 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:03,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:26:03,284 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-09-21 12:26:03,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:03,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594800732] [2020-09-21 12:26:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:03,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:03,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:26:03,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:03,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-09-21 12:26:03,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:26:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:03,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:26:03,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:03,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:03,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:03,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:03,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594800732] [2020-09-21 12:26:03,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:03,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:26:03,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988880866] [2020-09-21 12:26:03,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:26:03,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:26:03,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:26:03,765 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-09-21 12:26:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:04,048 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-09-21 12:26:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:04,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-21 12:26:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:04,050 INFO L225 Difference]: With dead ends: 62 [2020-09-21 12:26:04,051 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 12:26:04,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 12:26:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-09-21 12:26:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 12:26:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-09-21 12:26:04,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-09-21 12:26:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:04,057 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-09-21 12:26:04,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:26:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-09-21 12:26:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:26:04,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:04,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:04,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:26:04,060 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:04,060 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-09-21 12:26:04,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:04,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059494403] [2020-09-21 12:26:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:26:04,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-09-21 12:26:04,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:26:04,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:04,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:26:04,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:04,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:04,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:04,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:04,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:04,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059494403] [2020-09-21 12:26:04,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:04,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:26:04,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706889398] [2020-09-21 12:26:04,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:26:04,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:26:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:04,725 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 11 states. [2020-09-21 12:26:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:05,021 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-09-21 12:26:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:26:05,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-21 12:26:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:05,023 INFO L225 Difference]: With dead ends: 60 [2020-09-21 12:26:05,023 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 12:26:05,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:26:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 12:26:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-21 12:26:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 12:26:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-09-21 12:26:05,028 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2020-09-21 12:26:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:05,029 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-09-21 12:26:05,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:26:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-09-21 12:26:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:26:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:05,030 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] [2020-09-21 12:26:05,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:26:05,031 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-09-21 12:26:05,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:05,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091673288] [2020-09-21 12:26:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:26:05,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:05,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-09-21 12:26:05,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:26:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:05,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:26:05,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:05,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:05,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:05,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:05,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:05,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:26:05,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:05,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:05,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:05,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:05,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091673288] [2020-09-21 12:26:05,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:26:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682619420] [2020-09-21 12:26:05,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:26:05,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:26:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:26:05,602 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 11 states. [2020-09-21 12:26:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:05,822 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 12:26:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:26:05,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-21 12:26:05,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:05,823 INFO L225 Difference]: With dead ends: 54 [2020-09-21 12:26:05,823 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 12:26:05,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:26:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 12:26:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-21 12:26:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 12:26:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-09-21 12:26:05,829 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-09-21 12:26:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:05,829 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-09-21 12:26:05,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:26:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-09-21 12:26:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:26:05,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:05,831 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:26:05,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:26:05,832 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-09-21 12:26:05,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:05,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415416669] [2020-09-21 12:26:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:05,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:26:06,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:06,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-09-21 12:26:06,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:26:06,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:26:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:26:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:26:06,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:26:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:26:06,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:26:06,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:26:06,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:26:06,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:26:06,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:26:06,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:26:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:26:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:26:06,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:26:06,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:26:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:26:06,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415416669] [2020-09-21 12:26:06,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:26:06,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:26:06,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95833137] [2020-09-21 12:26:06,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:26:06,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:26:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:26:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:26:06,601 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2020-09-21 12:26:06,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:26:06,995 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-09-21 12:26:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 12:26:06,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-21 12:26:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:26:06,997 INFO L225 Difference]: With dead ends: 86 [2020-09-21 12:26:06,997 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 12:26:06,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:26:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 12:26:07,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-09-21 12:26:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 12:26:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-09-21 12:26:07,004 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 30 [2020-09-21 12:26:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:26:07,004 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-09-21 12:26:07,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:26:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-09-21 12:26:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:26:07,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:26:07,006 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] [2020-09-21 12:26:07,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:26:07,006 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:26:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:26:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-09-21 12:26:07,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:26:07,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726644389] [2020-09-21 12:26:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:26:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:26:07,029 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:26:07,030 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:26:07,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:26:07,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:26:07 BoogieIcfgContainer [2020-09-21 12:26:07,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:26:07,059 INFO L168 Benchmark]: Toolchain (without parser) took 11518.78 ms. Allocated memory was 147.8 MB in the beginning and 310.9 MB in the end (delta: 163.1 MB). Free memory was 102.9 MB in the beginning and 179.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 86.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,059 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.77 ms. Allocated memory was 147.8 MB in the beginning and 206.0 MB in the end (delta: 58.2 MB). Free memory was 102.2 MB in the beginning and 172.4 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,061 INFO L168 Benchmark]: Boogie Preprocessor took 82.08 ms. Allocated memory is still 206.0 MB. Free memory was 172.4 MB in the beginning and 169.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,062 INFO L168 Benchmark]: RCFGBuilder took 658.18 ms. Allocated memory is still 206.0 MB. Free memory was 169.2 MB in the beginning and 124.3 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,063 INFO L168 Benchmark]: TraceAbstraction took 10014.99 ms. Allocated memory was 206.0 MB in the beginning and 310.9 MB in the end (delta: 104.9 MB). Free memory was 123.6 MB in the beginning and 179.2 MB in the end (delta: -55.6 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:07,066 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 749.77 ms. Allocated memory was 147.8 MB in the beginning and 206.0 MB in the end (delta: 58.2 MB). Free memory was 102.2 MB in the beginning and 172.4 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 82.08 ms. Allocated memory is still 206.0 MB. Free memory was 172.4 MB in the beginning and 169.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 658.18 ms. Allocated memory is still 206.0 MB. Free memory was 169.2 MB in the beginning and 124.3 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10014.99 ms. Allocated memory was 206.0 MB in the beginning and 310.9 MB in the end (delta: 104.9 MB). Free memory was 123.6 MB in the beginning and 179.2 MB in the end (delta: -55.6 MB). Peak memory consumption was 49.3 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.9s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 480 SDslu, 892 SDs, 0 SdLazy, 1646 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 12 MinimizatonAttempts, 125 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 58228 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 10/48 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...