/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-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:24:34,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:24:34,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:24:34,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:24:34,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:24:34,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:24:34,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:24:34,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:24:34,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:24:34,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:24:34,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:24:34,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:24:34,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:24:34,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:24:34,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:24:34,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:24:34,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:24:34,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:24:34,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:24:34,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:24:34,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:24:34,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:24:34,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:24:34,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:24:34,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:24:34,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:24:34,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:24:34,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:24:34,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:24:34,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:24:34,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:24:34,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:24:34,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:24:34,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:24:34,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:24:34,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:24:34,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:24:34,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:24:34,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:24:34,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:24:34,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:24:34,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:24:34,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:24:34,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:24:34,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:24:34,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:24:34,477 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:24:34,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:24:34,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:24:34,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:24:34,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:24:34,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:24:34,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:24:34,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:24:34,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:24:34,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:24:34,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:24:34,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:24:34,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:24:34,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:24:34,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:24:34,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:24:34,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:24:34,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:24:34,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:24:34,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:24:34,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:24:34,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:24:34,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:24:34,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:24:34,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:24:34,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:24:34,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:24:35,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:24:35,023 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:24:35,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:24:35,026 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:24:35,027 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-21 11:24:35,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f56826df5/d2eef92abde54be6b548ab40635b6bab/FLAGc7ce6e97b [2020-09-21 11:24:35,726 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:24:35,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-09-21 11:24:35,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f56826df5/d2eef92abde54be6b548ab40635b6bab/FLAGc7ce6e97b [2020-09-21 11:24:36,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f56826df5/d2eef92abde54be6b548ab40635b6bab [2020-09-21 11:24:36,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:24:36,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:24:36,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:24:36,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:24:36,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:24:36,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec993ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36, skipping insertion in model container [2020-09-21 11:24:36,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:24:36,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:24:36,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:24:36,771 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:24:36,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:24:36,917 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:24:36,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36 WrapperNode [2020-09-21 11:24:36,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:24:36,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:24:36,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:24:36,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:24:36,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... [2020-09-21 11:24:36,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:24:36,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:24:36,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:24:36,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:24:37,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:24:37,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:24:37,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:24:37,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 11:24:37,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 11:24:37,084 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 11:24:37,084 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-21 11:24:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:24:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:24:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:24:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 11:24:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 11:24:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 11:24:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 11:24:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 11:24:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 11:24:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 11:24:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 11:24:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 11:24:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 11:24:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 11:24:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 11:24:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 11:24:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 11:24:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 11:24:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 11:24:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 11:24:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 11:24:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 11:24:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 11:24:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 11:24:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 11:24:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 11:24:37,096 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 11:24:37,097 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 11:24:37,098 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 11:24:37,099 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 11:24:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 11:24:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 11:24:37,100 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 11:24:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 11:24:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 11:24:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 11:24:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 11:24:37,101 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 11:24:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 11:24:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:24:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:24:37,102 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 11:24:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:24:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 11:24:37,103 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 11:24:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 11:24:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 11:24:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 11:24:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:24:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 11:24:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 11:24:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 11:24:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 11:24:37,108 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 11:24:37,109 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 11:24:37,110 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 11:24:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 11:24:37,112 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 11:24:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 11:24:37,114 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 11:24:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-21 11:24:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:24:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:24:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:24:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:24:37,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:24:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:24:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:24:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:24:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:24:37,482 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 11:24:37,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:24:37,696 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 11:24:37,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:24:37 BoogieIcfgContainer [2020-09-21 11:24:37,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:24:37,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:24:37,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:24:37,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:24:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:24:36" (1/3) ... [2020-09-21 11:24:37,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e8795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:24:37, skipping insertion in model container [2020-09-21 11:24:37,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:24:36" (2/3) ... [2020-09-21 11:24:37,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e8795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:24:37, skipping insertion in model container [2020-09-21 11:24:37,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:24:37" (3/3) ... [2020-09-21 11:24:37,712 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-09-21 11:24:37,724 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:24:37,734 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:24:37,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:24:37,784 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:24:37,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:24:37,785 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:24:37,785 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:24:37,785 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:24:37,785 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:24:37,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:24:37,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:24:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-09-21 11:24:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:24:37,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:37,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:37,815 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-09-21 11:24:37,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:37,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98778975] [2020-09-21 11:24:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,021 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,022 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,022 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,022 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:24:38,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:24:38,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:24:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:38,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:24:38,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,114 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,115 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,115 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,116 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:38,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:24:38,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:38,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:38,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:38,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,205 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,205 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,205 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,206 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-21 11:24:38,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:24:38,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:24:38,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:24:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:24:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:38,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98778975] [2020-09-21 11:24:38,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:38,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:24:38,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236641899] [2020-09-21 11:24:38,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:24:38,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:38,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:24:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:24:38,299 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-09-21 11:24:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:38,692 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-09-21 11:24:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:24:38,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 11:24:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:38,706 INFO L225 Difference]: With dead ends: 73 [2020-09-21 11:24:38,706 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:24:38,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:24:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:24:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-09-21 11:24:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:24:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-09-21 11:24:38,767 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-09-21 11:24:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:38,767 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-09-21 11:24:38,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:24:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-09-21 11:24:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:24:38,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:38,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:38,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:24:38,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-09-21 11:24:38,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:38,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769388576] [2020-09-21 11:24:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,832 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:24:38,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:24:38,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:24:38,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:38,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:24:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,914 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,914 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,915 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,915 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:38,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:38,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:38,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:38,963 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:38,964 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:38,964 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:38,964 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:38,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:24:38,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:38,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:24:38,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:24:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:24:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:39,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769388576] [2020-09-21 11:24:39,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:39,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:24:39,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791201176] [2020-09-21 11:24:39,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:24:39,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:39,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:24:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:24:39,021 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-09-21 11:24:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:39,209 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-09-21 11:24:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:24:39,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-21 11:24:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:39,212 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:24:39,212 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:24:39,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:24:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:24:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-21 11:24:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:24:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-09-21 11:24:39,222 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-09-21 11:24:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:39,222 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-09-21 11:24:39,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:24:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-09-21 11:24:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:24:39,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:39,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:39,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:24:39,225 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-09-21 11:24:39,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:39,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598653626] [2020-09-21 11:24:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,262 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,263 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,263 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,263 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 11:24:39,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:24:39,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:24:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:24:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:39,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,311 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,311 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,311 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,311 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:39,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:39,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:39,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:39,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,384 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,384 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,384 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,385 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 11:24:39,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:24:39,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:24:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:24:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:39,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598653626] [2020-09-21 11:24:39,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:39,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:24:39,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580207285] [2020-09-21 11:24:39,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:24:39,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:24:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:24:39,486 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 8 states. [2020-09-21 11:24:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:39,807 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-09-21 11:24:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:24:39,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 11:24:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:39,809 INFO L225 Difference]: With dead ends: 63 [2020-09-21 11:24:39,809 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:24:39,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:24:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:24:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 11:24:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:24:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-09-21 11:24:39,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-09-21 11:24:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:39,819 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-09-21 11:24:39,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:24:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-09-21 11:24:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:24:39,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:39,821 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:39,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:24:39,821 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:39,822 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-09-21 11:24:39,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:39,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483147051] [2020-09-21 11:24:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,871 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,872 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,872 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,872 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:24:39,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:24:39,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:24:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:39,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:24:39,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:39,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,926 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,926 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,928 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,929 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:39,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:24:39,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:39,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:39,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:39,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:39,983 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:39,983 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:39,983 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:39,984 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:39,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:24:39,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:39,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:24:39,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:39,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:24:39,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:39,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:24:39,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:40,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483147051] [2020-09-21 11:24:40,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:40,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:24:40,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978620432] [2020-09-21 11:24:40,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:24:40,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:40,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:24:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:24:40,067 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 9 states. [2020-09-21 11:24:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:40,322 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-09-21 11:24:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:24:40,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-21 11:24:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:40,324 INFO L225 Difference]: With dead ends: 70 [2020-09-21 11:24:40,324 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 11:24:40,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:24:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 11:24:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-09-21 11:24:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:24:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-09-21 11:24:40,332 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-09-21 11:24:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:40,333 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-09-21 11:24:40,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:24:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-09-21 11:24:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 11:24:40,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:40,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 11:24:40,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:24:40,335 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1408994219, now seen corresponding path program 2 times [2020-09-21 11:24:40,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:40,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135243448] [2020-09-21 11:24:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:40,395 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:40,395 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:40,395 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:40,396 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:40,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-21 11:24:40,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:40,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:24:40,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:24:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-21 11:24:40,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:40,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:40,455 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:40,455 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:40,456 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:40,456 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:40,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:40,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:40,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:40,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:40,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:40,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:40,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:40,521 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:40,521 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:40,522 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:40,522 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:40,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:24:40,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:40,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:24:40,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:24:40,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:40,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:24:40,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:40,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135243448] [2020-09-21 11:24:40,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:40,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:24:40,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423393472] [2020-09-21 11:24:40,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:24:40,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:40,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:24:40,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:24:40,627 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 10 states. [2020-09-21 11:24:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:40,888 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-09-21 11:24:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:24:40,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-09-21 11:24:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:40,890 INFO L225 Difference]: With dead ends: 77 [2020-09-21 11:24:40,890 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 11:24:40,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:24:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 11:24:40,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-21 11:24:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 11:24:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-09-21 11:24:40,899 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 41 [2020-09-21 11:24:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:40,899 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-09-21 11:24:40,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:24:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-09-21 11:24:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:24:40,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:40,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:40,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:24:40,901 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:40,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2107131782, now seen corresponding path program 3 times [2020-09-21 11:24:40,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:40,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945729151] [2020-09-21 11:24:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:40,954 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:40,955 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:40,955 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:40,955 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:40,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:24:40,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:24:40,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:24:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-21 11:24:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:24:40,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:41,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:41,026 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:41,026 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:41,026 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:41,027 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:41,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:41,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:41,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:41,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:41,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:41,074 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:41,075 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:41,075 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:41,075 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:41,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:24:41,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:41,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:41,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:41,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:41,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:24:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-21 11:24:41,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945729151] [2020-09-21 11:24:41,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:24:41,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:24:41,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76516017] [2020-09-21 11:24:41,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:24:41,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:24:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:24:41,114 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-09-21 11:24:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:41,251 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-09-21 11:24:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:24:41,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-09-21 11:24:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:41,255 INFO L225 Difference]: With dead ends: 71 [2020-09-21 11:24:41,256 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:24:41,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:24:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:24:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-21 11:24:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:24:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-09-21 11:24:41,266 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 48 [2020-09-21 11:24:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:41,266 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-09-21 11:24:41,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:24:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-09-21 11:24:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:24:41,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:41,268 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:41,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:24:41,268 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 1 times [2020-09-21 11:24:41,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:41,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59835679] [2020-09-21 11:24:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:41,340 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:41,341 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:41,341 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:41,341 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:41,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:24:41,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:41,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:24:41,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:41,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:24:41,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:24:41,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:24:41,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:41,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:41,413 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:41,414 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:41,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:41,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:41,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:41,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:41,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:41,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:41,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:41,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:41,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:41,509 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:41,509 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:41,509 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:41,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:41,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:24:41,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:24:41,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:24:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:24:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-21 11:24:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:41,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59835679] [2020-09-21 11:24:41,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:41,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:24:41,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195441015] [2020-09-21 11:24:41,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:24:41,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:41,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:24:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:24:41,653 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 11 states. [2020-09-21 11:24:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:41,950 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2020-09-21 11:24:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:24:41,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-21 11:24:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:41,952 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:24:41,952 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:24:41,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:24:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:24:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-21 11:24:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:24:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-09-21 11:24:41,961 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 48 [2020-09-21 11:24:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:41,961 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-09-21 11:24:41,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:24:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-09-21 11:24:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:24:41,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:41,963 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:41,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:24:41,963 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash 893734217, now seen corresponding path program 2 times [2020-09-21 11:24:41,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:41,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375529192] [2020-09-21 11:24:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:42,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:42,163 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:42,163 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:42,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:42,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 11:24:42,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-21 11:24:42,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:42,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:24:42,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 11:24:42,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:24:42,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:42,270 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:42,270 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:42,271 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:42,271 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:42,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:42,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:24:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:42,428 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:42,428 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:42,428 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:42,429 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:42,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 11:24:42,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:42,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-21 11:24:42,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:24:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-21 11:24:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-21 11:24:42,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375529192] [2020-09-21 11:24:42,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:42,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:24:42,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187353537] [2020-09-21 11:24:42,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:24:42,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:42,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:24:42,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:24:42,648 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 14 states. [2020-09-21 11:24:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:43,331 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-09-21 11:24:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:24:43,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-21 11:24:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:43,333 INFO L225 Difference]: With dead ends: 83 [2020-09-21 11:24:43,333 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 11:24:43,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:24:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 11:24:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-09-21 11:24:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:24:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-09-21 11:24:43,351 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 55 [2020-09-21 11:24:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:43,354 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-09-21 11:24:43,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:24:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-09-21 11:24:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 11:24:43,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:43,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:43,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:24:43,359 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-09-21 11:24:43,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:43,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91565387] [2020-09-21 11:24:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:24:43,459 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:24:43,460 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:24:43,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:24:43,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:24:43 BoogieIcfgContainer [2020-09-21 11:24:43,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:24:43,522 INFO L168 Benchmark]: Toolchain (without parser) took 7498.25 ms. Allocated memory was 146.8 MB in the beginning and 297.3 MB in the end (delta: 150.5 MB). Free memory was 101.8 MB in the beginning and 234.7 MB in the end (delta: -132.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:43,524 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:24:43,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 891.14 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 101.4 MB in the beginning and 168.5 MB in the end (delta: -67.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:43,526 INFO L168 Benchmark]: Boogie Preprocessor took 78.33 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 165.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:43,526 INFO L168 Benchmark]: RCFGBuilder took 703.42 ms. Allocated memory is still 202.4 MB. Free memory was 165.6 MB in the beginning and 120.2 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:43,530 INFO L168 Benchmark]: TraceAbstraction took 5812.27 ms. Allocated memory was 202.4 MB in the beginning and 297.3 MB in the end (delta: 94.9 MB). Free memory was 119.2 MB in the beginning and 234.7 MB in the end (delta: -115.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:24:43,538 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 120.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 891.14 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 101.4 MB in the beginning and 168.5 MB in the end (delta: -67.1 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 78.33 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 165.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 703.42 ms. Allocated memory is still 202.4 MB. Free memory was 165.6 MB in the beginning and 120.2 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5812.27 ms. Allocated memory was 202.4 MB in the beginning and 297.3 MB in the end (delta: 94.9 MB). Free memory was 119.2 MB in the beginning and 234.7 MB in the end (delta: -115.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L589] CALL, EXPR dll_create(len) [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] RET, EXPR dll_create(len) [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.6s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 300 SDtfs, 336 SDslu, 1207 SDs, 0 SdLazy, 1124 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, 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, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 292 ConstructedInterpolants, 0 QuantifiedInterpolants, 38552 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 115/202 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...