/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:44:50,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:44:50,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:44:50,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:44:50,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:44:50,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:44:50,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:44:50,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:44:50,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:44:50,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:44:50,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:44:50,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:44:50,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:44:50,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:44:50,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:44:50,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:44:50,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:44:50,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:44:50,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:44:50,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:44:50,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:44:50,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:44:50,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:44:50,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:44:50,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:44:50,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:44:50,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:44:50,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:44:50,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:44:50,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:44:50,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:44:50,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:44:50,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:44:50,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:44:50,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:44:50,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:44:50,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:44:50,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:44:50,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:44:50,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:44:50,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:44:50,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:44:50,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:44:50,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:44:50,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:44:50,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:44:50,761 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:44:50,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:44:50,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:44:50,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:44:50,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:44:50,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:44:50,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:44:50,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:44:50,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:44:50,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:44:50,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:44:50,764 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:44:50,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:44:50,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:44:50,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:44:50,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:44:50,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:44:50,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:44:50,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:44:50,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:44:50,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:44:50,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:44:50,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:50,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:44:50,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:44:50,768 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:44:51,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:44:51,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:44:51,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:44:51,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:44:51,223 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:44:51,224 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 22:44:51,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6774ec94/4fcecb07801648f7be4a267a806af443/FLAG52ca5af8d [2020-07-21 22:44:52,232 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:44:52,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 22:44:52,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6774ec94/4fcecb07801648f7be4a267a806af443/FLAG52ca5af8d [2020-07-21 22:44:52,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6774ec94/4fcecb07801648f7be4a267a806af443 [2020-07-21 22:44:52,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:44:52,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:44:52,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:44:52,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:44:52,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:44:52,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:44:52" (1/1) ... [2020-07-21 22:44:52,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e755a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:52, skipping insertion in model container [2020-07-21 22:44:52,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:44:52" (1/1) ... [2020-07-21 22:44:52,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:44:52,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:44:53,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:44:53,388 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:44:53,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:44:53,552 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:44:53,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53 WrapperNode [2020-07-21 22:44:53,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:44:53,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:44:53,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:44:53,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:44:53,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... [2020-07-21 22:44:53,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:44:53,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:44:53,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:44:53,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:44:53,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:44:53,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:44:53,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:44:53,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:44:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 22:44:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 22:44:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 22:44:53,788 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 22:44:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 22:44:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 22:44:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 22:44:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 22:44:53,789 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 22:44:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 22:44:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 22:44:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 22:44:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 22:44:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 22:44:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 22:44:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 22:44:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 22:44:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 22:44:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 22:44:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 22:44:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 22:44:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 22:44:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 22:44:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 22:44:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 22:44:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 22:44:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 22:44:53,793 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 22:44:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 22:44:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 22:44:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 22:44:53,794 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 22:44:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 22:44:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 22:44:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 22:44:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 22:44:53,795 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 22:44:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 22:44:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 22:44:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 22:44:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 22:44:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 22:44:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 22:44:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 22:44:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 22:44:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 22:44:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 22:44:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 22:44:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 22:44:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 22:44:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 22:44:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 22:44:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 22:44:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 22:44:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 22:44:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 22:44:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 22:44:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 22:44:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 22:44:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:44:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 22:44:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 22:44:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 22:44:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 22:44:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 22:44:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 22:44:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 22:44:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 22:44:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 22:44:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 22:44:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 22:44:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 22:44:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 22:44:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 22:44:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 22:44:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 22:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 22:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 22:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 22:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 22:44:53,805 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 22:44:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 22:44:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 22:44:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 22:44:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 22:44:53,806 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 22:44:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 22:44:53,808 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 22:44:53,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:44:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 22:44:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:44:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:44:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:44:53,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:44:54,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:44:54,825 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-07-21 22:44:54,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:44:54 BoogieIcfgContainer [2020-07-21 22:44:54,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:44:54,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:44:54,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:44:54,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:44:54,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:44:52" (1/3) ... [2020-07-21 22:44:54,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fff8c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:44:54, skipping insertion in model container [2020-07-21 22:44:54,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:44:53" (2/3) ... [2020-07-21 22:44:54,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fff8c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:44:54, skipping insertion in model container [2020-07-21 22:44:54,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:44:54" (3/3) ... [2020-07-21 22:44:54,851 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-07-21 22:44:54,871 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:44:54,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-21 22:44:54,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-21 22:44:54,951 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:44:54,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:44:54,952 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:44:54,952 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:44:54,952 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:44:54,952 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:44:54,952 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:44:54,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:44:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-07-21 22:44:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 22:44:55,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:55,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:55,006 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-07-21 22:44:55,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:55,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186630689] [2020-07-21 22:44:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:55,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:44:55,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:44:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:55,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:55,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186630689] [2020-07-21 22:44:55,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:55,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:44:55,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045589966] [2020-07-21 22:44:55,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:44:55,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:44:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:44:55,461 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2020-07-21 22:44:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:55,509 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-07-21 22:44:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:44:55,512 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 22:44:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:55,529 INFO L225 Difference]: With dead ends: 92 [2020-07-21 22:44:55,529 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 22:44:55,535 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 [2020-07-21 22:44:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 22:44:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 22:44:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 22:44:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-21 22:44:55,612 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-07-21 22:44:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:55,613 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-21 22:44:55,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:44:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-21 22:44:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 22:44:55,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:55,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:55,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:55,830 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-07-21 22:44:55,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:55,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982841521] [2020-07-21 22:44:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:55,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:44:55,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 22:44:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:56,114 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 [2020-07-21 22:44:56,115 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:56,132 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:56,133 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:56,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 22:44:56,230 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:56,231 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 22:44:56,235 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:56,241 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:56,257 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:56,270 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:56,280 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:56,284 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:56,285 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 22:44:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:56,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:56,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982841521] [2020-07-21 22:44:56,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:56,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:56,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984767497] [2020-07-21 22:44:56,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:56,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:56,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:56,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:56,308 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-07-21 22:44:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:56,495 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-21 22:44:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:44:56,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 22:44:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:56,498 INFO L225 Difference]: With dead ends: 43 [2020-07-21 22:44:56,498 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 22:44:56,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 22:44:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 22:44:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:44:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-21 22:44:56,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-07-21 22:44:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:56,512 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-21 22:44:56,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-21 22:44:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 22:44:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:56,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:56,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-07-21 22:44:56,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:56,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873087285] [2020-07-21 22:44:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:56,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:56,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:44:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:57,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:57,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873087285] [2020-07-21 22:44:57,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:57,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 22:44:57,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393665184] [2020-07-21 22:44:57,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 22:44:57,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 22:44:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 22:44:57,032 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-07-21 22:44:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:57,245 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-21 22:44:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 22:44:57,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 22:44:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:57,253 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:44:57,254 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 22:44:57,261 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 [2020-07-21 22:44:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 22:44:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-07-21 22:44:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:44:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-21 22:44:57,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-07-21 22:44:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:57,295 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-21 22:44:57,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 22:44:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-21 22:44:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:44:57,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:57,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:57,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:57,512 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-07-21 22:44:57,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:57,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189581485] [2020-07-21 22:44:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:57,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 22:44:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:57,888 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 [2020-07-21 22:44:57,890 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:57,895 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:57,896 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:57,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 22:44:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:57,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:57,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189581485] [2020-07-21 22:44:57,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:57,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:44:57,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536543506] [2020-07-21 22:44:57,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:44:57,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:57,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:44:57,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:57,914 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-07-21 22:44:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:58,075 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 22:44:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:58,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 22:44:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:58,077 INFO L225 Difference]: With dead ends: 39 [2020-07-21 22:44:58,078 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:44:58,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:44:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:44:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 22:44:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 22:44:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-07-21 22:44:58,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 16 [2020-07-21 22:44:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:58,089 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-07-21 22:44:58,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:44:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-07-21 22:44:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 22:44:58,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:58,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:44:58,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:58,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash -409960037, now seen corresponding path program 1 times [2020-07-21 22:44:58,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:58,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189153581] [2020-07-21 22:44:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:58,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:44:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:44:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:44:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:44:58,555 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 [2020-07-21 22:44:58,556 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:58,566 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:58,568 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:58,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 22:44:58,638 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:58,640 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 [2020-07-21 22:44:58,643 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 22:44:58,645 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:58,714 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:58,721 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_30|], 2=[|v_#memory_int_28|, |v_#memory_int_29|, |v_#memory_$Pointer$.offset_21|, |v_#memory_$Pointer$.base_22|]} [2020-07-21 22:44:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:58,771 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2020-07-21 22:44:58,772 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:58,822 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:58,833 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 22:44:58,870 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:59,057 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-07-21 22:44:59,060 INFO L350 Elim1Store]: treesize reduction 154, result has 52.9 percent of original size [2020-07-21 22:44:59,061 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 2 case distinctions, treesize of input 133 treesize of output 245 [2020-07-21 22:44:59,064 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:59,138 INFO L624 ElimStorePlain]: treesize reduction 154, result has 37.4 percent of original size [2020-07-21 22:44:59,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:59,146 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:59,169 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 22:44:59,177 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:59,192 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:59,197 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 22:44:59,198 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:153, output treesize:23 [2020-07-21 22:44:59,254 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 28 treesize of output 10 [2020-07-21 22:44:59,256 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:44:59,265 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:44:59,268 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:44:59,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-07-21 22:44:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:44:59,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:44:59,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189153581] [2020-07-21 22:44:59,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:44:59,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:44:59,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119548519] [2020-07-21 22:44:59,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:44:59,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:44:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:44:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:44:59,289 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-07-21 22:44:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:44:59,656 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-21 22:44:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:44:59,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 22:44:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:44:59,659 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:44:59,660 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:44:59,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:44:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:44:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 22:44:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 22:44:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-21 22:44:59,673 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 16 [2020-07-21 22:44:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:44:59,674 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-21 22:44:59,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:44:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-21 22:44:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:44:59,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:44:59,675 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] [2020-07-21 22:44:59,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:44:59,890 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:44:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:44:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1407314597, now seen corresponding path program 1 times [2020-07-21 22:44:59,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:44:59,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170946076] [2020-07-21 22:44:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:00,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:45:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:45:00,141 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:45:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:45:00,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:45:00,276 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:45:00,277 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:45:00,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:45:00,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:45:00 BoogieIcfgContainer [2020-07-21 22:45:00,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:45:00,543 INFO L168 Benchmark]: Toolchain (without parser) took 8170.49 ms. Allocated memory was 137.4 MB in the beginning and 252.2 MB in the end (delta: 114.8 MB). Free memory was 100.2 MB in the beginning and 219.4 MB in the end (delta: -119.2 MB). Peak memory consumption was 127.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,544 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1178.17 ms. Allocated memory was 137.4 MB in the beginning and 203.4 MB in the end (delta: 66.1 MB). Free memory was 99.8 MB in the beginning and 171.1 MB in the end (delta: -71.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,546 INFO L168 Benchmark]: Boogie Preprocessor took 125.15 ms. Allocated memory is still 203.4 MB. Free memory was 171.1 MB in the beginning and 168.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,546 INFO L168 Benchmark]: RCFGBuilder took 1154.06 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 121.1 MB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,548 INFO L168 Benchmark]: TraceAbstraction took 5703.69 ms. Allocated memory was 203.4 MB in the beginning and 252.2 MB in the end (delta: 48.8 MB). Free memory was 120.4 MB in the beginning and 219.4 MB in the end (delta: -99.0 MB). Peak memory consumption was 81.3 MB. Max. memory is 7.1 GB. [2020-07-21 22:45:00,552 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1178.17 ms. Allocated memory was 137.4 MB in the beginning and 203.4 MB in the end (delta: 66.1 MB). Free memory was 99.8 MB in the beginning and 171.1 MB in the end (delta: -71.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.15 ms. Allocated memory is still 203.4 MB. Free memory was 171.1 MB in the beginning and 168.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1154.06 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 121.1 MB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5703.69 ms. Allocated memory was 203.4 MB in the beginning and 252.2 MB in the end (delta: 48.8 MB). Free memory was 120.4 MB in the beginning and 219.4 MB in the end (delta: -99.0 MB). Peak memory consumption was 81.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; VAL [head={-2:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] [L1019] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=1] [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=1] [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}, x->data=2] [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 91 SDslu, 232 SDs, 0 SdLazy, 139 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 83 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 58 ConstructedInterpolants, 3 QuantifiedInterpolants, 2806 SizeOfPredicates, 17 NumberOfNonLiveVariables, 406 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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...