/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:35,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:35,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:35,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:35,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:35,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:35,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:35,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:35,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:35,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:35,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:35,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:35,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:35,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:35,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:35,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:35,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:35,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:35,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:35,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:35,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:35,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:35,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:35,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:35,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:35,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:35,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:35,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:35,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:35,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:35,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:35,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:35,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:35,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:35,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:35,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:35,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:35,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:35,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:35,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:35,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:35,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:31:35,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:35,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:35,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:35,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:35,830 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:35,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:35,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:35,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:35,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:35,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:35,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:35,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:35,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:35,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:35,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:35,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:35,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:35,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:35,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:35,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:35,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:35,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:35,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:35,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:35,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:31:36,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:36,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:36,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:36,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:36,123 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:36,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 11:31:36,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed0c3db62/67eaf2bdad4549e39b72f540a78e2110/FLAG6455f302d [2020-07-20 11:31:36,695 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:36,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 11:31:36,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed0c3db62/67eaf2bdad4549e39b72f540a78e2110/FLAG6455f302d [2020-07-20 11:31:37,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed0c3db62/67eaf2bdad4549e39b72f540a78e2110 [2020-07-20 11:31:37,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:37,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:37,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:37,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:37,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:37,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8e84bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37, skipping insertion in model container [2020-07-20 11:31:37,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:37,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:37,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:37,500 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:37,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:37,624 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:37,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37 WrapperNode [2020-07-20 11:31:37,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:37,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:37,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:37,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:37,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... [2020-07-20 11:31:37,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:37,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:37,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:37,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:37,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:37,749 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:37,749 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:37,749 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:37,749 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:37,749 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:37,752 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:37,754 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:37,755 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:37,759 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:37,760 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:37,761 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:37,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:37,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:38,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:38,272 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-20 11:31:38,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:38 BoogieIcfgContainer [2020-07-20 11:31:38,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:38,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:38,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:38,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:38,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:37" (1/3) ... [2020-07-20 11:31:38,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d38298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:38, skipping insertion in model container [2020-07-20 11:31:38,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:37" (2/3) ... [2020-07-20 11:31:38,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d38298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:38, skipping insertion in model container [2020-07-20 11:31:38,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:38" (3/3) ... [2020-07-20 11:31:38,284 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-07-20 11:31:38,295 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:38,303 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 11:31:38,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 11:31:38,342 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:38,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:38,342 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:38,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:38,343 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:38,343 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:38,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:38,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 11:31:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:38,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:38,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:38,369 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-20 11:31:38,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:38,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105567996] [2020-07-20 11:31:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:38,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:38,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105567996] [2020-07-20 11:31:38,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:38,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126327786] [2020-07-20 11:31:38,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:38,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:38,592 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 11:31:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:38,615 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-07-20 11:31:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:38,617 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 11:31:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:38,626 INFO L225 Difference]: With dead ends: 59 [2020-07-20 11:31:38,627 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:31:38,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:31:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 11:31:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:31:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 11:31:38,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-07-20 11:31:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:38,669 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 11:31:38,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 11:31:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:31:38,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:38,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:38,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:38,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 622671912, now seen corresponding path program 1 times [2020-07-20 11:31:38,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:38,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009860629] [2020-07-20 11:31:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:39,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:39,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009860629] [2020-07-20 11:31:39,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:39,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:39,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688860887] [2020-07-20 11:31:39,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:39,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:39,030 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-07-20 11:31:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:39,083 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-07-20 11:31:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:39,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 11:31:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:39,085 INFO L225 Difference]: With dead ends: 35 [2020-07-20 11:31:39,085 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:31:39,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:31:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-20 11:31:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:31:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 11:31:39,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-07-20 11:31:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:39,092 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 11:31:39,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 11:31:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:31:39,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:39,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:39,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:39,308 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-20 11:31:39,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:39,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967988286] [2020-07-20 11:31:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:31:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:39,497 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 13 treesize of output 9 [2020-07-20 11:31:39,497 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:39,506 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:39,507 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:39,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 11:31:39,539 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 11:31:39,540 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:39,542 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:39,542 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:39,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:39,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:39,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967988286] [2020-07-20 11:31:39,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:39,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:39,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438360168] [2020-07-20 11:31:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:39,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:39,553 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 11:31:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:39,649 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 11:31:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:31:39,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:31:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:39,650 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:31:39,651 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:31:39,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:31:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:31:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-20 11:31:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:31:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 11:31:39,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-20 11:31:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:39,660 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 11:31:39,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 11:31:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:31:39,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:39,661 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:39,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:39,875 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-20 11:31:39,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:39,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829038580] [2020-07-20 11:31:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:39,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 11:31:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:40,004 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 [2020-07-20 11:31:40,005 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,017 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,023 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 13 treesize of output 9 [2020-07-20 11:31:40,023 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,047 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,048 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,048 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-07-20 11:31:40,104 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,105 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 [2020-07-20 11:31:40,106 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,160 INFO L624 ElimStorePlain]: treesize reduction 14, result has 81.1 percent of original size [2020-07-20 11:31:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:40,174 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 25 treesize of output 13 [2020-07-20 11:31:40,175 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,194 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,199 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 25 treesize of output 13 [2020-07-20 11:31:40,200 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,216 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,217 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,217 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-07-20 11:31:40,286 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,287 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 [2020-07-20 11:31:40,288 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,317 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,319 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_26|, |v_#memory_int_27|], 4=[|v_#memory_int_29|]} [2020-07-20 11:31:40,325 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,346 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,350 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,368 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 11:31:40,394 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-20 11:31:40,395 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-20 11:31:40,396 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,414 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,419 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,419 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2020-07-20 11:31:40,507 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 33 treesize of output 13 [2020-07-20 11:31:40,508 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,515 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,516 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:40,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-20 11:31:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:40,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:31:40,566 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_27|], 3=[|v_#memory_int_26|]} [2020-07-20 11:31:40,572 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,587 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,590 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,601 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,603 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,603 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:55 [2020-07-20 11:31:40,651 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_25|], 6=[|v_#memory_int_31|]} [2020-07-20 11:31:40,656 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,681 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,684 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,702 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:40,705 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2020-07-20 11:31:40,705 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:96, output treesize:102 [2020-07-20 11:31:42,857 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:42,857 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 22 treesize of output 26 [2020-07-20 11:31:42,858 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:42,861 INFO L624 ElimStorePlain]: treesize reduction 108, result has 0.9 percent of original size [2020-07-20 11:31:42,862 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_24| vanished before elimination [2020-07-20 11:31:42,863 INFO L544 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:42,863 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:121, output treesize:1 [2020-07-20 11:31:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:42,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829038580] [2020-07-20 11:31:42,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:31:42,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 11:31:42,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166878990] [2020-07-20 11:31:42,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:31:42,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:31:42,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 11:31:42,873 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-20 11:31:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:43,394 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-20 11:31:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:31:43,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 11:31:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:43,396 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:31:43,396 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:31:43,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 11:31:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:31:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-20 11:31:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 11:31:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 11:31:43,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-20 11:31:43,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:43,403 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 11:31:43,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:31:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 11:31:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:31:43,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:43,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:43,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:43,610 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-20 11:31:43,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:43,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065312542] [2020-07-20 11:31:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:31:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:43,718 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 19 treesize of output 7 [2020-07-20 11:31:43,719 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:31:43,720 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:31:43,721 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:31:43,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 11:31:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:43,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:43,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065312542] [2020-07-20 11:31:43,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:43,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:31:43,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612164502] [2020-07-20 11:31:43,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:31:43,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:31:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:43,731 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-20 11:31:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:43,803 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 11:31:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:31:43,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 11:31:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:43,804 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:31:43,805 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:31:43,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:31:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:31:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-07-20 11:31:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:31:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 11:31:43,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-20 11:31:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:43,810 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 11:31:43,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:31:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 11:31:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:31:43,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:43,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:44,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:44,022 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-20 11:31:44,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:44,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165392252] [2020-07-20 11:31:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:44,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:44,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:44,130 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:44,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:44,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:44,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:44 BoogieIcfgContainer [2020-07-20 11:31:44,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:44,373 INFO L168 Benchmark]: Toolchain (without parser) took 7353.43 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 103.2 MB in the beginning and 123.9 MB in the end (delta: -20.7 MB). Peak memory consumption was 84.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,374 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.48 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 172.5 MB in the end (delta: -69.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,376 INFO L168 Benchmark]: Boogie Preprocessor took 61.15 ms. Allocated memory is still 205.0 MB. Free memory was 172.5 MB in the beginning and 170.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,376 INFO L168 Benchmark]: RCFGBuilder took 588.91 ms. Allocated memory is still 205.0 MB. Free memory was 169.3 MB in the beginning and 124.6 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,379 INFO L168 Benchmark]: TraceAbstraction took 6094.70 ms. Allocated memory was 205.0 MB in the beginning and 245.4 MB in the end (delta: 40.4 MB). Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 123.5 kB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:44,385 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 602.48 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 172.5 MB in the end (delta: -69.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.15 ms. Allocated memory is still 205.0 MB. Free memory was 172.5 MB in the beginning and 170.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 588.91 ms. Allocated memory is still 205.0 MB. Free memory was 169.3 MB in the beginning and 124.6 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6094.70 ms. Allocated memory was 205.0 MB in the beginning and 245.4 MB in the end (delta: 40.4 MB). Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 123.5 kB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 144 SDtfs, 144 SDslu, 266 SDs, 0 SdLazy, 203 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 9 QuantifiedInterpolants, 12776 SizeOfPredicates, 24 NumberOfNonLiveVariables, 386 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/4 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...