/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:39:19,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:39:19,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:39:19,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:39:19,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:39:19,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:39:19,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:39:19,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:39:19,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:39:19,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:39:19,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:39:19,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:39:19,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:39:19,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:39:19,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:39:19,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:39:19,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:39:19,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:39:19,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:39:19,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:39:19,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:39:19,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:39:19,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:39:19,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:39:19,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 16:39:19,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 16:39:19,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 16:39:19,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 16:39:19,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 16:39:19,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 16:39:19,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 16:39:19,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 16:39:19,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 16:39:19,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 16:39:19,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 16:39:19,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 16:39:19,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 16:39:19,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 16:39:19,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:39:19,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:39:19,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:39:19,768 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 [2020-08-22 16:39:19,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:39:19,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:39:19,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:39:19,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:39:19,807 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:39:19,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:39:19,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:39:19,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:39:19,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:39:19,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:39:19,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:39:19,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:39:19,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:39:19,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:39:19,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:39:19,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:39:19,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:39:19,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:39:19,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:39:19,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:39:19,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:39:19,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:39:19,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:39:19,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:39:19,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:39:19,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:39:19,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:39:19,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:39:19,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:39:19,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:39:20,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:39:20,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:39:20,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:39:20,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:39:20,108 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:39:20,109 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 16:39:20,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425fd1214/a5de1e54882848c4acbdcadce189a502/FLAGcbd6f7b52 [2020-08-22 16:39:20,743 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:39:20,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list-2.i [2020-08-22 16:39:20,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425fd1214/a5de1e54882848c4acbdcadce189a502/FLAGcbd6f7b52 [2020-08-22 16:39:21,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425fd1214/a5de1e54882848c4acbdcadce189a502 [2020-08-22 16:39:21,030 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:39:21,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:39:21,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:39:21,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:39:21,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:39:21,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18839cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21, skipping insertion in model container [2020-08-22 16:39:21,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:39:21,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:39:21,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:39:21,586 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:39:21,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:39:21,725 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:39:21,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21 WrapperNode [2020-08-22 16:39:21,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:39:21,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:39:21,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:39:21,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:39:21,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (1/1) ... [2020-08-22 16:39:21,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:39:21,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:39:21,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:39:21,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:39:21,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (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 [2020-08-22 16:39:21,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:39:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:39:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 16:39:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 16:39:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-08-22 16:39:21,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-08-22 16:39:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-08-22 16:39:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 16:39:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:39:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:39:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 16:39:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 16:39:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 16:39:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 16:39:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 16:39:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 16:39:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 16:39:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 16:39:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 16:39:21,864 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 16:39:21,865 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 16:39:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 16:39:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:39:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 16:39:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 16:39:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 16:39:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 16:39:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 16:39:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 16:39:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 16:39:21,875 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:39:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:39:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:39:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:39:22,249 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 16:39:22,423 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:39:22,423 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 16:39:22,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:22 BoogieIcfgContainer [2020-08-22 16:39:22,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:39:22,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:39:22,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:39:22,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:39:22,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:39:21" (1/3) ... [2020-08-22 16:39:22,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50aa55b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:22, skipping insertion in model container [2020-08-22 16:39:22,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:21" (2/3) ... [2020-08-22 16:39:22,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50aa55b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:22, skipping insertion in model container [2020-08-22 16:39:22,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:22" (3/3) ... [2020-08-22 16:39:22,436 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-08-22 16:39:22,446 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:39:22,454 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:39:22,468 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:39:22,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:39:22,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:39:22,491 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:39:22,491 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:39:22,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:39:22,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:39:22,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:39:22,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:39:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 16:39:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:39:22,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:22,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:22,516 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-08-22 16:39:22,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:22,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714075263] [2020-08-22 16:39:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:22,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714075263] [2020-08-22 16:39:22,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:22,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:39:22,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624659595] [2020-08-22 16:39:22,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:39:22,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:22,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:39:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:22,722 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 16:39:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:22,848 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-22 16:39:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:39:22,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 16:39:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:22,858 INFO L225 Difference]: With dead ends: 56 [2020-08-22 16:39:22,858 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 16:39:22,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:39:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 16:39:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 16:39:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 16:39:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-22 16:39:22,921 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-08-22 16:39:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:22,922 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-22 16:39:22,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:39:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-22 16:39:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 16:39:22,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:22,924 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] [2020-08-22 16:39:22,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:39:22,924 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-08-22 16:39:22,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:22,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318236458] [2020-08-22 16:39:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:23,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318236458] [2020-08-22 16:39:23,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:23,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:39:23,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552660018] [2020-08-22 16:39:23,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:39:23,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:23,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:39:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:39:23,099 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-22 16:39:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:23,291 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-22 16:39:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:39:23,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 16:39:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:23,295 INFO L225 Difference]: With dead ends: 50 [2020-08-22 16:39:23,296 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 16:39:23,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:39:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 16:39:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-08-22 16:39:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 16:39:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-08-22 16:39:23,313 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-08-22 16:39:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:23,314 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-08-22 16:39:23,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:39:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-08-22 16:39:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:39:23,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:23,315 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:23,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:39:23,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-08-22 16:39:23,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:23,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734270365] [2020-08-22 16:39:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:23,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734270365] [2020-08-22 16:39:23,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:23,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:39:23,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303960581] [2020-08-22 16:39:23,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:39:23,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:39:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:39:23,405 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-08-22 16:39:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:23,534 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 16:39:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:39:23,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 16:39:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:23,536 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:39:23,536 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 16:39:23,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:39:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 16:39:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-08-22 16:39:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 16:39:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-08-22 16:39:23,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-08-22 16:39:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:23,544 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-08-22 16:39:23,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:39:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-08-22 16:39:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:39:23,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:23,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 16:39:23,546 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-08-22 16:39:23,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:23,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866410461] [2020-08-22 16:39:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:23,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866410461] [2020-08-22 16:39:23,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:39:23,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:39:23,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469558311] [2020-08-22 16:39:23,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:39:23,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:23,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:39:23,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:39:23,624 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-08-22 16:39:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:23,738 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 16:39:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:39:23,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-22 16:39:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:23,740 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:39:23,740 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:39:23,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:39:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:39:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-08-22 16:39:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 16:39:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 16:39:23,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-08-22 16:39:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:23,746 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 16:39:23,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:39:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 16:39:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:39:23,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:23,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:23,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:39:23,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:23,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-08-22 16:39:23,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:23,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371224579] [2020-08-22 16:39:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:23,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371224579] [2020-08-22 16:39:23,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275867065] [2020-08-22 16:39:23,894 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-08-22 16:39:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:24,090 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:24,090 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,097 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,097 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:24,159 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,160 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:39:24,161 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,177 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 [2020-08-22 16:39:24,177 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,187 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,187 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-08-22 16:39:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:24,222 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-08-22 16:39:24,223 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,231 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,231 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-08-22 16:39:24,279 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:39:24,281 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,293 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:24,293 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-08-22 16:39:24,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-08-22 16:39:24,346 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,350 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:24,352 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:24,352 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-08-22 16:39:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:24,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:24,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-08-22 16:39:24,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446247482] [2020-08-22 16:39:24,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:39:24,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:39:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:39:24,359 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 14 states. [2020-08-22 16:39:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:24,700 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-22 16:39:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:39:24,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-08-22 16:39:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:24,702 INFO L225 Difference]: With dead ends: 54 [2020-08-22 16:39:24,702 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:39:24,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:39:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:39:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-08-22 16:39:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:39:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-22 16:39:24,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2020-08-22 16:39:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:24,713 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-22 16:39:24,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:39:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-22 16:39:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:39:24,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:24,717 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:24,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:24,918 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-08-22 16:39:24,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:24,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780297919] [2020-08-22 16:39:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:25,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780297919] [2020-08-22 16:39:25,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071499051] [2020-08-22 16:39:25,076 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2020-08-22 16:39:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:25,204 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:25,205 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,209 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:25,257 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,257 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:39:25,258 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,268 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,273 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 [2020-08-22 16:39:25,274 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,284 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,285 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2020-08-22 16:39:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:25,321 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-08-22 16:39:25,322 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,329 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:15 [2020-08-22 16:39:25,366 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:39:25,367 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,376 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,378 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:25,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-08-22 16:39:25,424 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2020-08-22 16:39:25,426 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:25,431 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:25,431 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-08-22 16:39:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:25,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:25,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-08-22 16:39:25,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136828278] [2020-08-22 16:39:25,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:39:25,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:39:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:39:25,437 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 14 states. [2020-08-22 16:39:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:25,813 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-08-22 16:39:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:39:25,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-08-22 16:39:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:25,815 INFO L225 Difference]: With dead ends: 63 [2020-08-22 16:39:25,815 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 16:39:25,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:39:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 16:39:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-08-22 16:39:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 16:39:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-08-22 16:39:25,830 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2020-08-22 16:39:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:25,830 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-08-22 16:39:25,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:39:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-08-22 16:39:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:39:25,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:25,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:26,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:26,047 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -562710342, now seen corresponding path program 1 times [2020-08-22 16:39:26,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:26,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181459732] [2020-08-22 16:39:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:26,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:26,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181459732] [2020-08-22 16:39:26,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386818589] [2020-08-22 16:39:26,212 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2020-08-22 16:39:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:26,334 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:26,334 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,339 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,339 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,339 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:26,359 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,359 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:39:26,360 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,367 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-08-22 16:39:26,377 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:26,377 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,388 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,395 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:26,395 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,406 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,406 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-08-22 16:39:26,422 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_22|], 2=[|v_#memory_$Pointer$.base_18|, |v_#memory_$Pointer$.offset_16|]} [2020-08-22 16:39:26,426 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-08-22 16:39:26,427 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,461 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,462 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-08-22 16:39:26,467 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-08-22 16:39:26,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:39:26,468 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,492 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-08-22 16:39:26,495 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-08-22 16:39:26,496 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,502 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,503 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,503 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-08-22 16:39:26,530 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 31 treesize of output 19 [2020-08-22 16:39:26,531 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,539 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-08-22 16:39:26,539 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,544 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,545 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,545 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-08-22 16:39:26,550 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 [2020-08-22 16:39:26,551 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:26,553 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:26,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:39:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:26,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:26,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-08-22 16:39:26,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057907549] [2020-08-22 16:39:26,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:39:26,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:39:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:39:26,558 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-08-22 16:39:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:26,844 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-08-22 16:39:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:39:26,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-08-22 16:39:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:26,846 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:39:26,846 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:39:26,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:39:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:39:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-08-22 16:39:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:39:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-22 16:39:26,853 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2020-08-22 16:39:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:26,854 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-22 16:39:26,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:39:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-22 16:39:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:39:26,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:26,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:27,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:27,056 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:27,057 INFO L82 PathProgramCache]: Analyzing trace with hash 449917269, now seen corresponding path program 1 times [2020-08-22 16:39:27,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:27,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961601405] [2020-08-22 16:39:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:27,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961601405] [2020-08-22 16:39:27,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907874829] [2020-08-22 16:39:27,233 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-08-22 16:39:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:27,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:27,345 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,354 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,355 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:27,374 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,374 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:39:27,375 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,400 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-08-22 16:39:27,412 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:27,413 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,427 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,432 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:27,432 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,445 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,446 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-08-22 16:39:27,458 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_23|], 2=[|v_#memory_$Pointer$.base_20|, |v_#memory_$Pointer$.offset_18|]} [2020-08-22 16:39:27,463 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-08-22 16:39:27,464 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,476 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,497 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,497 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-08-22 16:39:27,500 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-08-22 16:39:27,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:39:27,501 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,523 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-08-22 16:39:27,527 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-08-22 16:39:27,527 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,534 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,535 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-08-22 16:39:27,560 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 31 treesize of output 19 [2020-08-22 16:39:27,561 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,569 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-08-22 16:39:27,570 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,575 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,575 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-08-22 16:39:27,580 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 [2020-08-22 16:39:27,580 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:27,582 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:27,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:39:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:27,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:27,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-08-22 16:39:27,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741155541] [2020-08-22 16:39:27,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:39:27,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:39:27,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:39:27,602 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 12 states. [2020-08-22 16:39:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:27,920 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-08-22 16:39:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:39:27,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 16:39:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:27,924 INFO L225 Difference]: With dead ends: 69 [2020-08-22 16:39:27,924 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 16:39:27,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:39:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 16:39:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-08-22 16:39:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:39:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-08-22 16:39:27,933 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-08-22 16:39:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:27,933 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-08-22 16:39:27,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:39:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-08-22 16:39:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:39:27,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:27,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:28,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:28,137 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 2 times [2020-08-22 16:39:28,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:28,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560367272] [2020-08-22 16:39:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:28,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:28,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560367272] [2020-08-22 16:39:28,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307416016] [2020-08-22 16:39:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:28,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:39:28,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:39:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 36 conjunts are in the unsatisfiable core [2020-08-22 16:39:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:28,417 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:28,418 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,422 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,423 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,423 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:28,441 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-08-22 16:39:28,442 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,449 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,450 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2020-08-22 16:39:28,466 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:28,466 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,476 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,479 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:28,479 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,493 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,493 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:26 [2020-08-22 16:39:28,506 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_24|], 2=[|v_#memory_$Pointer$.base_22|, |v_#memory_$Pointer$.offset_20|]} [2020-08-22 16:39:28,514 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-08-22 16:39:28,515 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,552 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,552 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 108 [2020-08-22 16:39:28,554 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-08-22 16:39:28,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:39:28,556 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,573 INFO L625 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2020-08-22 16:39:28,604 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2020-08-22 16:39:28,605 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,611 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,612 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:27 [2020-08-22 16:39:28,640 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 31 treesize of output 19 [2020-08-22 16:39:28,641 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,648 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,651 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-08-22 16:39:28,651 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,658 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,660 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,660 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:7 [2020-08-22 16:39:28,665 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 [2020-08-22 16:39:28,665 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:28,667 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:28,667 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:39:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:28,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:28,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-08-22 16:39:28,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433089419] [2020-08-22 16:39:28,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:39:28,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:28,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:39:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:39:28,689 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-08-22 16:39:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:28,976 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 16:39:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:39:28,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-08-22 16:39:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:28,977 INFO L225 Difference]: With dead ends: 62 [2020-08-22 16:39:28,977 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 16:39:28,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:39:28,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 16:39:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-22 16:39:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 16:39:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-22 16:39:28,988 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-08-22 16:39:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:28,989 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-22 16:39:28,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:39:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-22 16:39:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:39:28,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:28,993 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:29,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:29,207 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-08-22 16:39:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:29,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549413474] [2020-08-22 16:39:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:29,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:29,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549413474] [2020-08-22 16:39:29,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083034125] [2020-08-22 16:39:29,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:29,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:39:29,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:39:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-08-22 16:39:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:29,512 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:29,512 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,517 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,517 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:29,550 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,551 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-08-22 16:39:29,552 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,579 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-08-22 16:39:29,587 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:29,587 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,600 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,601 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,601 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-08-22 16:39:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:29,633 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-08-22 16:39:29,635 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,642 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,643 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,643 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-08-22 16:39:29,684 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,685 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-08-22 16:39:29,686 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,702 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:39:29,703 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,714 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,714 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-08-22 16:39:29,768 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:39:29,769 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-08-22 16:39:29,770 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,779 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,781 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:29,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-08-22 16:39:29,845 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-08-22 16:39:29,846 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,861 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:29,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-08-22 16:39:29,948 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-08-22 16:39:29,952 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:29,961 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:29,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-08-22 16:39:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:29,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:29,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-08-22 16:39:29,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560565963] [2020-08-22 16:39:29,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:39:29,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:39:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:39:29,983 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 19 states. [2020-08-22 16:39:32,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:32,568 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-08-22 16:39:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:39:32,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-08-22 16:39:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:32,569 INFO L225 Difference]: With dead ends: 73 [2020-08-22 16:39:32,569 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 16:39:32,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:39:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 16:39:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-08-22 16:39:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 16:39:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-08-22 16:39:32,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 28 [2020-08-22 16:39:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:32,576 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-08-22 16:39:32,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:39:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-08-22 16:39:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:39:32,577 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:32,577 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:32,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:32,779 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-08-22 16:39:32,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:32,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550751766] [2020-08-22 16:39:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:33,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550751766] [2020-08-22 16:39:33,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524759555] [2020-08-22 16:39:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2020-08-22 16:39:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:33,212 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:33,213 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,219 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:33,258 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,258 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-08-22 16:39:33,259 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,299 INFO L625 ElimStorePlain]: treesize reduction 14, result has 71.4 percent of original size [2020-08-22 16:39:33,303 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:33,303 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,316 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,316 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,317 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:31 [2020-08-22 16:39:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:33,357 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-08-22 16:39:33,358 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,368 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,368 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:25 [2020-08-22 16:39:33,436 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,437 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-08-22 16:39:33,437 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,452 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-08-22 16:39:33,453 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,463 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,463 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:30 [2020-08-22 16:39:33,517 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-08-22 16:39:33,518 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2020-08-22 16:39:33,519 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,531 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:33,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:30 [2020-08-22 16:39:33,591 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2020-08-22 16:39:33,592 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,603 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,609 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:33,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:37 [2020-08-22 16:39:33,684 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-08-22 16:39:33,686 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:33,693 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:33,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:41, output treesize:3 [2020-08-22 16:39:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:33,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:33,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-08-22 16:39:33,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45122652] [2020-08-22 16:39:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 16:39:33,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 16:39:33,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 16:39:33,715 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 19 states. [2020-08-22 16:39:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:34,398 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2020-08-22 16:39:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:39:34,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-08-22 16:39:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:34,401 INFO L225 Difference]: With dead ends: 93 [2020-08-22 16:39:34,401 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 16:39:34,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-08-22 16:39:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 16:39:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2020-08-22 16:39:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:39:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-08-22 16:39:34,408 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-08-22 16:39:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:34,409 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-08-22 16:39:34,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 16:39:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-08-22 16:39:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:39:34,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:34,410 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:34,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:34,624 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 3 times [2020-08-22 16:39:34,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:34,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627568175] [2020-08-22 16:39:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:39:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:39:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627568175] [2020-08-22 16:39:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815934109] [2020-08-22 16:39:34,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:39:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:39:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:39:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjunts are in the unsatisfiable core [2020-08-22 16:39:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:39:35,011 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-08-22 16:39:35,011 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,015 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,015 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-08-22 16:39:35,037 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,037 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-08-22 16:39:35,038 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,069 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-08-22 16:39:35,070 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2020-08-22 16:39:35,110 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:35,111 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,128 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,137 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-08-22 16:39:35,137 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,150 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,151 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2020-08-22 16:39:35,210 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,211 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2020-08-22 16:39:35,212 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,233 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,234 INFO L441 ElimStorePlain]: Different costs {0=[|v_#memory_int_35|], 2=[|v_#memory_$Pointer$.offset_22|, |v_#memory_$Pointer$.base_28|]} [2020-08-22 16:39:35,240 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 [2020-08-22 16:39:35,240 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:35,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-08-22 16:39:35,270 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,312 INFO L350 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2020-08-22 16:39:35,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2020-08-22 16:39:35,313 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,343 INFO L625 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2020-08-22 16:39:35,343 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,344 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:89, output treesize:40 [2020-08-22 16:39:35,400 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 113 [2020-08-22 16:39:35,401 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,426 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:39:35,433 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2020-08-22 16:39:35,433 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,478 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,479 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 118 [2020-08-22 16:39:35,481 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[9, 3, 2, 1] term [2020-08-22 16:39:35,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-08-22 16:39:35,482 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,514 INFO L625 ElimStorePlain]: treesize reduction 26, result has 80.5 percent of original size [2020-08-22 16:39:35,515 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,515 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:162, output treesize:118 [2020-08-22 16:39:35,566 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_37|], 6=[|v_#memory_$Pointer$.base_30|, |v_#memory_$Pointer$.offset_24|]} [2020-08-22 16:39:35,571 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2020-08-22 16:39:35,572 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,648 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,649 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 261 [2020-08-22 16:39:35,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-08-22 16:39:35,654 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,655 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-08-22 16:39:35,657 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 9 disjuncts [2020-08-22 16:39:35,662 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,665 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,668 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,670 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,673 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-08-22 16:39:35,677 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,678 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-08-22 16:39:35,680 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 9 disjuncts [2020-08-22 16:39:35,682 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,685 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,687 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 11 disjuncts [2020-08-22 16:39:35,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,689 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-08-22 16:39:35,692 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 10 disjuncts [2020-08-22 16:39:35,694 INFO L545 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:35,758 INFO L625 ElimStorePlain]: treesize reduction 152, result has 42.4 percent of original size [2020-08-22 16:39:35,768 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 60 [2020-08-22 16:39:35,769 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,788 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,788 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:307, output treesize:119 [2020-08-22 16:39:35,914 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,915 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 78 [2020-08-22 16:39:35,917 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-08-22 16:39:35,918 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-08-22 16:39:35,919 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:35,945 INFO L625 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2020-08-22 16:39:35,948 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 26 [2020-08-22 16:39:35,949 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:39:35,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:39:35,959 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:39:35,959 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:137, output treesize:30 [2020-08-22 16:39:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:39:36,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:39:36,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-08-22 16:39:36,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496751600] [2020-08-22 16:39:36,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:39:36,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:39:36,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:39:36,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:39:36,043 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 21 states. [2020-08-22 16:39:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:39:36,803 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-08-22 16:39:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:39:36,803 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-08-22 16:39:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:39:36,805 INFO L225 Difference]: With dead ends: 90 [2020-08-22 16:39:36,805 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 16:39:36,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:39:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 16:39:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-08-22 16:39:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 16:39:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2020-08-22 16:39:36,814 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 30 [2020-08-22 16:39:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:39:36,814 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2020-08-22 16:39:36,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:39:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2020-08-22 16:39:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:39:36,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:39:36,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:39:37,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:39:37,021 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:39:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:39:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-08-22 16:39:37,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:39:37,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49373264] [2020-08-22 16:39:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:39:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:39:37,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:39:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:39:37,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:39:37,074 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:39:37,074 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:39:37,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 16:39:37,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:37 BoogieIcfgContainer [2020-08-22 16:39:37,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:39:37,129 INFO L168 Benchmark]: Toolchain (without parser) took 16097.17 ms. Allocated memory was 147.3 MB in the beginning and 361.8 MB in the end (delta: 214.4 MB). Free memory was 102.4 MB in the beginning and 234.3 MB in the end (delta: -131.9 MB). Peak memory consumption was 82.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,129 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.31 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 170.3 MB in the end (delta: -68.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,130 INFO L168 Benchmark]: Boogie Preprocessor took 71.84 ms. Allocated memory is still 204.5 MB. Free memory was 170.3 MB in the beginning and 167.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,130 INFO L168 Benchmark]: RCFGBuilder took 627.01 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 122.3 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,131 INFO L168 Benchmark]: TraceAbstraction took 14698.96 ms. Allocated memory was 204.5 MB in the beginning and 361.8 MB in the end (delta: 157.3 MB). Free memory was 121.6 MB in the beginning and 234.3 MB in the end (delta: -112.7 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:39:37,134 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 694.31 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 170.3 MB in the end (delta: -68.1 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.84 ms. Allocated memory is still 204.5 MB. Free memory was 170.3 MB in the beginning and 167.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 627.01 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 122.3 MB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14698.96 ms. Allocated memory was 204.5 MB in the beginning and 361.8 MB in the end (delta: 157.3 MB). Free memory was 121.6 MB in the beginning and 234.3 MB in the end (delta: -112.7 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; [L524] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L528] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, t={-3:0}] [L541] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-1:0}, p->h=1, t={-3:0}] [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, p->h=2, t={-3:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-3:0}, p={-2:0}, t={-3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.5s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 249 SDtfs, 550 SDslu, 1337 SDs, 0 SdLazy, 2300 SolverSat, 246 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 394 GetRequests, 200 SyntacticMatches, 9 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 151 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 492 ConstructedInterpolants, 16 QuantifiedInterpolants, 145504 SizeOfPredicates, 111 NumberOfNonLiveVariables, 926 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 16/92 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...