/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:16:54,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:16:54,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:16:54,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:16:54,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:16:54,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:16:54,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:16:54,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:16:54,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:16:54,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:16:54,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:16:54,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:16:54,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:16:54,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:16:54,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:16:54,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:16:54,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:16:54,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:16:54,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:16:54,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:16:54,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:16:54,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:16:54,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:16:54,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:16:54,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:16:54,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:16:54,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:16:54,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:16:54,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:16:54,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:16:54,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:16:54,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:16:54,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:16:54,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:16:54,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:16:54,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:16:54,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:16:54,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:16:54,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:16:54,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:16:54,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:16:54,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:16:54,815 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:16:54,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:16:54,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:16:54,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:16:54,818 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:16:54,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:16:54,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:16:54,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:16:54,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:16:54,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:16:54,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:16:54,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:16:54,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:16:54,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:16:54,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:16:54,820 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:16:54,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:16:54,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:16:54,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:16:54,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:16:54,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:16:54,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:16:54,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:16:54,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:16:54,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:16:54,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:16:54,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:54,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:16:54,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:16:54,823 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:16:55,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:16:55,235 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:16:55,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:16:55,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:16:55,245 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:16:55,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-21 11:16:55,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87440c35/ad18ddc974be433aaff9d11b8fa3d96a/FLAG737febb6e [2020-07-21 11:16:56,142 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:16:56,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-21 11:16:56,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87440c35/ad18ddc974be433aaff9d11b8fa3d96a/FLAG737febb6e [2020-07-21 11:16:56,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a87440c35/ad18ddc974be433aaff9d11b8fa3d96a [2020-07-21 11:16:56,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:16:56,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:16:56,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:16:56,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:16:56,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:16:56,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:16:56" (1/1) ... [2020-07-21 11:16:56,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b7286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:56, skipping insertion in model container [2020-07-21 11:16:56,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:16:56" (1/1) ... [2020-07-21 11:16:56,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:16:56,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:16:56,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:16:56,986 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:16:57,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:16:57,121 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:16:57,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57 WrapperNode [2020-07-21 11:16:57,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:16:57,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:16:57,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:16:57,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:16:57,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... [2020-07-21 11:16:57,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:16:57,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:16:57,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:16:57,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:16:57,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 11:16:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:16:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:16:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 11:16:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 11:16:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 11:16:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 11:16:57,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 11:16:57,322 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 11:16:57,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:16:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:16:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:16:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:16:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:16:57,323 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:16:57,324 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:16:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:16:57,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:16:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 11:16:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 11:16:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 11:16:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 11:16:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 11:16:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:16:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:16:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:16:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:16:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:16:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:16:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:16:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:16:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:16:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:16:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:16:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:16:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:16:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:16:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:16:57,334 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:16:57,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:16:57,336 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:16:57,337 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:16:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:16:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:16:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:16:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:16:57,338 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:16:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:16:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:16:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:16:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:16:57,339 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:16:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:16:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:16:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:16:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:16:57,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:16:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:16:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:16:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:16:57,341 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:16:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:16:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:16:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 11:16:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:16:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:16:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:16:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:16:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:16:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:16:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:16:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:16:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:16:57,877 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 11:16:58,162 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:16:58,163 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:16:58,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:16:58 BoogieIcfgContainer [2020-07-21 11:16:58,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:16:58,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:16:58,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:16:58,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:16:58,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:16:56" (1/3) ... [2020-07-21 11:16:58,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c9a065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:16:58, skipping insertion in model container [2020-07-21 11:16:58,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:16:57" (2/3) ... [2020-07-21 11:16:58,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c9a065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:16:58, skipping insertion in model container [2020-07-21 11:16:58,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:16:58" (3/3) ... [2020-07-21 11:16:58,189 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-07-21 11:16:58,207 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:16:58,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:16:58,247 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:16:58,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:16:58,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:16:58,291 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:16:58,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:16:58,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:16:58,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:16:58,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:16:58,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:16:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 11:16:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:16:58,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:58,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:58,331 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-07-21 11:16:58,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:58,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444483369] [2020-07-21 11:16:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:16:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:16:58,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:16:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:16:58,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:16:58,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444483369] [2020-07-21 11:16:58,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:16:58,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:16:58,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219158972] [2020-07-21 11:16:58,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:16:58,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:16:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:16:58,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:16:58,671 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 11:16:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:16:58,752 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-21 11:16:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:16:58,754 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 11:16:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:16:58,770 INFO L225 Difference]: With dead ends: 46 [2020-07-21 11:16:58,770 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 11:16:58,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:16:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 11:16:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 11:16:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 11:16:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 11:16:58,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-07-21 11:16:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:16:58,879 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 11:16:58,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:16:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 11:16:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:16:58,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:58,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:59,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:59,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times [2020-07-21 11:16:59,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:59,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446094420] [2020-07-21 11:16:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:16:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:16:59,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:16:59,399 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 11:16:59,400 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:16:59,409 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:16:59,410 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:16:59,410 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 11:16:59,452 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:16:59,453 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:16:59,457 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:16:59,458 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:16:59,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 11:16:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:16:59,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:16:59,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446094420] [2020-07-21 11:16:59,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:16:59,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:16:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765206367] [2020-07-21 11:16:59,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:16:59,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:16:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:16:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:16:59,480 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-07-21 11:16:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:16:59,750 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-07-21 11:16:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:16:59,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 11:16:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:16:59,753 INFO L225 Difference]: With dead ends: 48 [2020-07-21 11:16:59,754 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 11:16:59,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:16:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 11:16:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-21 11:16:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:16:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 11:16:59,769 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2020-07-21 11:16:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:16:59,770 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 11:16:59,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:16:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 11:16:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:16:59,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:16:59,772 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:16:59,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:16:59,989 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:16:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:16:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-07-21 11:16:59,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:16:59,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984006820] [2020-07-21 11:16:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:00,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:17:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:00,169 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 11:17:00,170 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,174 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:00,175 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 11:17:00,197 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:17:00,199 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,203 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:00,204 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 11:17:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:17:00,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:00,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984006820] [2020-07-21 11:17:00,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:00,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:17:00,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588088623] [2020-07-21 11:17:00,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:17:00,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:00,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:17:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:17:00,230 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-07-21 11:17:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:00,395 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-21 11:17:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:17:00,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 11:17:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:00,397 INFO L225 Difference]: With dead ends: 50 [2020-07-21 11:17:00,397 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 11:17:00,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:17:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 11:17:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-21 11:17:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 11:17:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-21 11:17:00,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-07-21 11:17:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:00,409 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-21 11:17:00,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:17:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-21 11:17:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:17:00,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:00,411 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:00,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:00,627 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-07-21 11:17:00,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:00,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021075938] [2020-07-21 11:17:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:17:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:00,873 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 11:17:00,874 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,881 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:00,883 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 11:17:00,910 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 11:17:00,913 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,917 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:17:00,918 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:17:00,918 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 11:17:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:17:00,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:00,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021075938] [2020-07-21 11:17:00,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:00,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:17:00,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947371990] [2020-07-21 11:17:00,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:17:00,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:17:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:17:00,951 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-07-21 11:17:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:01,103 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-07-21 11:17:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:17:01,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 11:17:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:01,106 INFO L225 Difference]: With dead ends: 48 [2020-07-21 11:17:01,107 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 11:17:01,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:17:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 11:17:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-07-21 11:17:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 11:17:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-21 11:17:01,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-07-21 11:17:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:01,116 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-21 11:17:01,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:17:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-21 11:17:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:17:01,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:01,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:01,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:01,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-07-21 11:17:01,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:01,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229143947] [2020-07-21 11:17:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:17:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:17:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:17:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:17:01,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:17:01,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229143947] [2020-07-21 11:17:01,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:17:01,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:17:01,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605986053] [2020-07-21 11:17:01,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:17:01,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:17:01,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:17:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:17:01,490 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2020-07-21 11:17:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:17:01,527 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-07-21 11:17:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:17:01,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:17:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:17:01,530 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:17:01,530 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 11:17:01,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:17:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 11:17:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-21 11:17:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 11:17:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-21 11:17:01,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-07-21 11:17:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:17:01,540 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-21 11:17:01,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:17:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-21 11:17:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:17:01,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:17:01,542 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:17:01,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:01,756 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:17:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:17:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-07-21 11:17:01,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:17:01,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250319760] [2020-07-21 11:17:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:17:01,874 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:17:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:17:01,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:17:01,955 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:17:01,956 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:17:02,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:17:02,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:17:02 BoogieIcfgContainer [2020-07-21 11:17:02,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:17:02,240 INFO L168 Benchmark]: Toolchain (without parser) took 5927.92 ms. Allocated memory was 136.3 MB in the beginning and 252.2 MB in the end (delta: 115.9 MB). Free memory was 98.7 MB in the beginning and 147.9 MB in the end (delta: -49.2 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:17:02,242 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory is still 117.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:17:02,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 810.79 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 98.2 MB in the beginning and 166.6 MB in the end (delta: -68.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:17:02,248 INFO L168 Benchmark]: Boogie Preprocessor took 88.24 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 164.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:17:02,253 INFO L168 Benchmark]: RCFGBuilder took 957.42 ms. Allocated memory is still 200.8 MB. Free memory was 164.6 MB in the beginning and 120.7 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:17:02,257 INFO L168 Benchmark]: TraceAbstraction took 4060.91 ms. Allocated memory was 200.8 MB in the beginning and 252.2 MB in the end (delta: 51.4 MB). Free memory was 119.7 MB in the beginning and 147.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:17:02,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory is still 117.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 810.79 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 98.2 MB in the beginning and 166.6 MB in the end (delta: -68.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 88.24 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 164.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 957.42 ms. Allocated memory is still 200.8 MB. Free memory was 164.6 MB in the beginning and 120.7 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4060.91 ms. Allocated memory was 200.8 MB in the beginning and 252.2 MB in the end (delta: 51.4 MB). Free memory was 119.7 MB in the beginning and 147.9 MB in the end (delta: -28.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}] [L524] COND FALSE !(a == 0) VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}] [L525] p = a VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L532] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, t={21239:0}] [L533] COND FALSE !(t == 0) VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, t={21239:0}] [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, t={21239:0}] [L539] COND TRUE \read(flag) VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, t={21239:0}] [L540] EXPR p->h VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, p->h=1, t={21239:0}] [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, p->h=1, t={21239:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, flag=-1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={21239:0}, p={-1:0}, t={21239:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 71 SDslu, 179 SDs, 0 SdLazy, 132 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 3902 SizeOfPredicates, 15 NumberOfNonLiveVariables, 402 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...