/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:10,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:10,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:10,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:10,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:10,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:10,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:10,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:10,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:10,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:10,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:10,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:10,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:10,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:10,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:10,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:10,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:10,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:10,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:10,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:10,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:10,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:10,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:10,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:10,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:10,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:10,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:10,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:10,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:10,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:10,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:11,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:11,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:11,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:11,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:11,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:11,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:11,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:11,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:11,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:11,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:11,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:23:11,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:11,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:11,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:11,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:11,057 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:11,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:11,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:11,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:11,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:11,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:11,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:11,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:11,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:11,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:11,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:11,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:11,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:11,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:11,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:11,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:11,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:11,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:11,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:11,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:11,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:11,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:11,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:11,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:11,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:11,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:11,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:11,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:11,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:11,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:11,607 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:11,608 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-09-21 11:23:11,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98303eb04/0f01963cf1e64198a9a9ae862e986a54/FLAG40f591292 [2020-09-21 11:23:12,321 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:12,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-09-21 11:23:12,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98303eb04/0f01963cf1e64198a9a9ae862e986a54/FLAG40f591292 [2020-09-21 11:23:12,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98303eb04/0f01963cf1e64198a9a9ae862e986a54 [2020-09-21 11:23:12,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:12,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:12,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:12,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:12,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:12,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdfc9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:12, skipping insertion in model container [2020-09-21 11:23:12,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:12" (1/1) ... [2020-09-21 11:23:12,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:12,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:13,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,144 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:13,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:13,287 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:13,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13 WrapperNode [2020-09-21 11:23:13,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:13,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:13,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:13,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... [2020-09-21 11:23:13,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:13,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:13,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:13,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:13,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:13,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-21 11:23:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-21 11:23:13,447 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 11:23:13,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:13,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:13,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:23:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:23:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:23:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:23:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:23:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:23:13,450 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-21 11:23:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:23:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:23:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:23:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:23:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:23:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:23:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:23:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:23:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:23:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:23:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:23:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:23:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:23:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:23:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:23:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 11:23:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:23:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:23:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:23:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:23:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:23:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:23:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:23:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:13,826 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 11:23:14,014 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:14,014 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:23:14,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14 BoogieIcfgContainer [2020-09-21 11:23:14,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:14,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:14,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:14,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:14,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:12" (1/3) ... [2020-09-21 11:23:14,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603a4ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:13" (2/3) ... [2020-09-21 11:23:14,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603a4ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:14, skipping insertion in model container [2020-09-21 11:23:14,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:14" (3/3) ... [2020-09-21 11:23:14,037 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-09-21 11:23:14,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:14,059 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:14,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:14,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:14,107 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:14,107 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:14,107 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:14,108 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:14,108 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:14,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:14,108 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-21 11:23:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:23:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:14,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:14,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-09-21 11:23:14,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:14,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357157548] [2020-09-21 11:23:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,324 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,324 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:23:14,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:23:14,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:23:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:14,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,398 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,398 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,399 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,399 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:14,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:14,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:14,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:14,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357157548] [2020-09-21 11:23:14,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:14,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:14,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192360537] [2020-09-21 11:23:14,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:14,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:14,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:14,447 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-09-21 11:23:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:14,586 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-09-21 11:23:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:14,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-21 11:23:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:14,601 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:23:14,601 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:23:14,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:23:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 11:23:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 11:23:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-21 11:23:14,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-09-21 11:23:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:14,679 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-21 11:23:14,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-21 11:23:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:23:14,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:14,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:14,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:14,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times [2020-09-21 11:23:14,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:14,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719584113] [2020-09-21 11:23:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,763 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,764 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,764 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,764 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:23:14,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:23:14,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:23:14,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:14,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:14,898 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:14,899 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:14,899 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:14,899 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:14,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:14,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:14,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:14,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719584113] [2020-09-21 11:23:14,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:14,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:14,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237740534] [2020-09-21 11:23:14,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:14,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:14,924 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-09-21 11:23:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,077 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-09-21 11:23:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-21 11:23:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,079 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:23:15,079 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:23:15,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:23:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-09-21 11:23:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:23:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-09-21 11:23:15,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2020-09-21 11:23:15,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,090 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-09-21 11:23:15,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-09-21 11:23:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:23:15,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,091 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:15,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:15,092 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-09-21 11:23:15,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590227062] [2020-09-21 11:23:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,137 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,138 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,141 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,141 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:23:15,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:23:15,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:15,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,241 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,241 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,242 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,242 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:23:15,258 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 11:23:15,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590227062] [2020-09-21 11:23:15,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:15,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954254120] [2020-09-21 11:23:15,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:15,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:15,262 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-09-21 11:23:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,403 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-21 11:23:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 11:23:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,404 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:23:15,404 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:23:15,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:23:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-09-21 11:23:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:23:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-09-21 11:23:15,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-09-21 11:23:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,413 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-09-21 11:23:15,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-09-21 11:23:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:23:15,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,414 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:15,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:15,415 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-09-21 11:23:15,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554663523] [2020-09-21 11:23:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,445 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,445 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,446 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:23:15,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,520 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,520 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,520 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,521 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,526 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 11:23:15,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554663523] [2020-09-21 11:23:15,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:23:15,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243656342] [2020-09-21 11:23:15,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:15,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:15,529 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-09-21 11:23:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,656 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-09-21 11:23:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:15,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 11:23:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,657 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:23:15,658 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:23:15,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:23:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-09-21 11:23:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:23:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 11:23:15,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-09-21 11:23:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,664 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 11:23:15,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 11:23:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:23:15,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,666 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] [2020-09-21 11:23:15,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:15,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-09-21 11:23:15,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955034330] [2020-09-21 11:23:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,692 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,692 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,692 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,693 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 11:23:15,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:23:15,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 11:23:15,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:15,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:15,742 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:15,742 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:15,742 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:15,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:15,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:15,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:15,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:15,749 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 11:23:15,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955034330] [2020-09-21 11:23:15,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:15,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:23:15,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598936649] [2020-09-21 11:23:15,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:23:15,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:23:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:15,752 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-09-21 11:23:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:15,824 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-09-21 11:23:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:23:15,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-09-21 11:23:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:15,826 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:23:15,826 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:23:15,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:23:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 11:23:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:23:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-09-21 11:23:15,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-09-21 11:23:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:15,833 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-09-21 11:23:15,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:23:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-09-21 11:23:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:23:15,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:15,835 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] [2020-09-21 11:23:15,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:15,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:15,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-09-21 11:23:15,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:15,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115739916] [2020-09-21 11:23:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:15,866 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:15,866 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:15,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:15,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:15 BoogieIcfgContainer [2020-09-21 11:23:15,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:15,898 INFO L168 Benchmark]: Toolchain (without parser) took 3318.35 ms. Allocated memory was 140.5 MB in the beginning and 237.0 MB in the end (delta: 96.5 MB). Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 106.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:15,899 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:15,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.72 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.2 MB in the beginning and 171.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:15,901 INFO L168 Benchmark]: Boogie Preprocessor took 71.36 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 168.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:15,902 INFO L168 Benchmark]: RCFGBuilder took 658.50 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 124.5 MB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:15,903 INFO L168 Benchmark]: TraceAbstraction took 1865.95 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 123.9 MB in the beginning and 92.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:15,907 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 703.72 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.2 MB in the beginning and 171.0 MB in the end (delta: -68.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.36 ms. Allocated memory is still 204.5 MB. Free memory was 171.0 MB in the beginning and 168.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 658.50 ms. Allocated memory is still 204.5 MB. Free memory was 168.4 MB in the beginning and 124.5 MB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1865.95 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 123.9 MB in the beginning and 92.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 63.9 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] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) [L524] COND FALSE !(a == 0) [L525] p = a [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 [L532] t = (List) malloc(sizeof(struct node)) [L533] COND FALSE !(t == 0) [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a [L539] COND TRUE \read(flag) [L540] EXPR p->h [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 73 SDslu, 178 SDs, 0 SdLazy, 288 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 4694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...