/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/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:07:40,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:07:40,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:07:40,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:07:40,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:07:40,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:07:40,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:07:40,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:07:40,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:07:40,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:07:40,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:07:40,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:07:40,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:07:40,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:07:40,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:07:40,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:07:40,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:07:40,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:07:40,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:07:40,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:07:40,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:07:40,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:07:40,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:07:40,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:07:40,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:07:40,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:07:40,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:07:40,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:07:40,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:07:40,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:07:40,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:07:40,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:07:40,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:07:40,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:07:40,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:07:40,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:07:40,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:07:40,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:07:40,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:07:40,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:07:40,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:07:40,536 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 01:07:40,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:07:40,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:07:40,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:07:40,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:07:40,586 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:07:40,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:07:40,588 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:07:40,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:07:40,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:07:40,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:07:40,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:07:40,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:07:40,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:07:40,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:07:40,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:07:40,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:07:40,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:07:40,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:07:40,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:07:40,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:07:40,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:07:40,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:07:40,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:07:40,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:07:40,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:07:40,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:07:40,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:40,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:07:40,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:07:40,594 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 01:07:40,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:07:40,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:07:40,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:07:40,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:07:40,991 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:07:40,991 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-21 01:07:41,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ee4d6cb/58d52c42f2c54a4ebd9cb06a8583e5f5/FLAG907a2553d [2020-07-21 01:07:41,695 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:07:41,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-07-21 01:07:41,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ee4d6cb/58d52c42f2c54a4ebd9cb06a8583e5f5/FLAG907a2553d [2020-07-21 01:07:41,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53ee4d6cb/58d52c42f2c54a4ebd9cb06a8583e5f5 [2020-07-21 01:07:41,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:07:41,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:07:41,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:07:41,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:07:41,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:07:41,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:07:41" (1/1) ... [2020-07-21 01:07:41,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2954c7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:41, skipping insertion in model container [2020-07-21 01:07:41,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:07:41" (1/1) ... [2020-07-21 01:07:41,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:07:42,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:07:42,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:07:42,517 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:07:42,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:07:42,691 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:07:42,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42 WrapperNode [2020-07-21 01:07:42,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:07:42,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:07:42,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:07:42,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:07:42,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (1/1) ... [2020-07-21 01:07:42,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:07:42,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:07:42,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:07:42,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:07:42,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (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 01:07:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:07:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:07:42,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 01:07:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 01:07:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 01:07:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 01:07:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 01:07:42,862 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 01:07:42,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:07:42,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:07:42,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:07:42,863 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:07:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:07:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:07:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:07:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:07:42,864 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:07:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:07:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:07:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:07:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:07:42,865 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 01:07:42,866 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:07:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:07:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:07:42,869 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:07:42,870 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:07:42,871 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:07:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:07:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:07:42,874 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:07:42,875 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:07:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:07:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:07:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:07:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:07:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:07:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:07:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:07:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:07:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:07:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:07:43,253 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 01:07:43,477 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:07:43,477 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:07:43,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:07:43 BoogieIcfgContainer [2020-07-21 01:07:43,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:07:43,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:07:43,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:07:43,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:07:43,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:07:41" (1/3) ... [2020-07-21 01:07:43,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635e806f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:07:43, skipping insertion in model container [2020-07-21 01:07:43,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:07:42" (2/3) ... [2020-07-21 01:07:43,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635e806f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:07:43, skipping insertion in model container [2020-07-21 01:07:43,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:07:43" (3/3) ... [2020-07-21 01:07:43,495 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-07-21 01:07:43,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:07:43,520 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:07:43,542 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:07:43,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:07:43,573 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:07:43,573 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:07:43,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:07:43,574 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:07:43,574 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:07:43,574 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:07:43,574 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:07:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 01:07:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:07:43,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:43,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:43,610 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times [2020-07-21 01:07:43,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:43,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629133238] [2020-07-21 01:07:43,631 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 01:07:43,846 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:07:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:07:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:43,892 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 01:07:43,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:43,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629133238] [2020-07-21 01:07:43,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:43,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:07:43,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184309576] [2020-07-21 01:07:43,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:07:43,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:43,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:07:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:07:43,925 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 01:07:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:43,957 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-07-21 01:07:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:07:43,960 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 01:07:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:43,971 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:07:43,971 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 01:07:43,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:07:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 01:07:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 01:07:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 01:07:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 01:07:44,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-07-21 01:07:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:44,032 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 01:07:44,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:07:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 01:07:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:07:44,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:44,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:44,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:44,251 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times [2020-07-21 01:07:44,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:44,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125602456] [2020-07-21 01:07:44,252 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 01:07:44,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:07:44,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:07:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:44,521 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:07:44,522 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:44,530 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:44,531 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:07:44,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 01:07:44,586 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 01:07:44,588 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:44,592 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:44,592 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 01:07:44,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 01:07:44,608 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 01:07:44,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:44,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125602456] [2020-07-21 01:07:44,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:07:44,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014603816] [2020-07-21 01:07:44,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:07:44,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:07:44,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:07:44,617 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-07-21 01:07:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:44,793 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-07-21 01:07:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:07:44,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 01:07:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:44,795 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:07:44,796 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 01:07:44,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:07:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 01:07:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-07-21 01:07:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:07:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 01:07:44,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2020-07-21 01:07:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:44,808 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 01:07:44,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:07:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 01:07:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:07:44,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:44,810 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:45,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:45,024 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times [2020-07-21 01:07:45,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:45,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966134442] [2020-07-21 01:07:45,028 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 01:07:45,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:07:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:07:45,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:45,171 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:07:45,172 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,175 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:45,176 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,177 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 01:07:45,192 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 01:07:45,194 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,197 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:45,197 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 01:07:45,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 01:07:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:07:45,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:45,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966134442] [2020-07-21 01:07:45,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:45,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:07:45,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163383066] [2020-07-21 01:07:45,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:07:45,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:07:45,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:07:45,218 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-07-21 01:07:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:45,347 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-21 01:07:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:07:45,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 01:07:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:45,349 INFO L225 Difference]: With dead ends: 50 [2020-07-21 01:07:45,350 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 01:07:45,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:07:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 01:07:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-07-21 01:07:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:07:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-21 01:07:45,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2020-07-21 01:07:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:45,360 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-21 01:07:45,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:07:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-21 01:07:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:07:45,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:45,362 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:45,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:45,579 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times [2020-07-21 01:07:45,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:45,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965449894] [2020-07-21 01:07:45,582 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 01:07:45,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:07:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:07:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:45,791 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:07:45,792 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,797 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:45,798 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,799 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 01:07:45,817 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 01:07:45,818 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:07:45,823 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:07:45,823 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 01:07:45,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 01:07:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:07:45,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:45,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965449894] [2020-07-21 01:07:45,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:45,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:07:45,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842704716] [2020-07-21 01:07:45,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:07:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:07:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:07:45,843 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-07-21 01:07:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:45,971 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-07-21 01:07:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:07:45,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 01:07:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:45,973 INFO L225 Difference]: With dead ends: 48 [2020-07-21 01:07:45,973 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 01:07:45,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:07:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 01:07:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2020-07-21 01:07:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 01:07:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-07-21 01:07:45,982 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2020-07-21 01:07:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:45,982 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-07-21 01:07:45,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:07:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-07-21 01:07:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:07:45,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:45,983 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:46,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:46,199 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times [2020-07-21 01:07:46,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:46,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764645492] [2020-07-21 01:07:46,201 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 01:07:46,302 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:07:46,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:07:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:07:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:07:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:07:46,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:07:46,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764645492] [2020-07-21 01:07:46,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:07:46,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:07:46,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132317502] [2020-07-21 01:07:46,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:07:46,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:07:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:07:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:07:46,336 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2020-07-21 01:07:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:07:46,366 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-07-21 01:07:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:07:46,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 01:07:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:07:46,370 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:07:46,370 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 01:07:46,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:07:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 01:07:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-21 01:07:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 01:07:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-21 01:07:46,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2020-07-21 01:07:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:07:46,382 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-21 01:07:46,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:07:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-21 01:07:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:07:46,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:07:46,385 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:07:46,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:46,599 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:07:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:07:46,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times [2020-07-21 01:07:46,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:07:46,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305314903] [2020-07-21 01:07:46,602 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 01:07:46,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:07:46,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:07:46,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:07:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:07:46,740 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:07:46,777 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:07:46,777 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:07:46,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:07:47,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:07:47 BoogieIcfgContainer [2020-07-21 01:07:47,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:07:47,035 INFO L168 Benchmark]: Toolchain (without parser) took 5096.05 ms. Allocated memory was 146.8 MB in the beginning and 247.5 MB in the end (delta: 100.7 MB). Free memory was 103.4 MB in the beginning and 130.2 MB in the end (delta: -26.8 MB). Peak memory consumption was 73.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,036 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 749.47 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 103.0 MB in the beginning and 173.5 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,037 INFO L168 Benchmark]: Boogie Preprocessor took 74.91 ms. Allocated memory is still 206.6 MB. Free memory was 173.5 MB in the beginning and 170.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,038 INFO L168 Benchmark]: RCFGBuilder took 715.32 ms. Allocated memory is still 206.6 MB. Free memory was 170.9 MB in the beginning and 127.2 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,039 INFO L168 Benchmark]: TraceAbstraction took 3548.25 ms. Allocated memory was 206.6 MB in the beginning and 247.5 MB in the end (delta: 40.9 MB). Free memory was 126.6 MB in the beginning and 130.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:07:47,043 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 749.47 ms. Allocated memory was 146.8 MB in the beginning and 206.6 MB in the end (delta: 59.8 MB). Free memory was 103.0 MB in the beginning and 173.5 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.91 ms. Allocated memory is still 206.6 MB. Free memory was 173.5 MB in the beginning and 170.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 715.32 ms. Allocated memory is still 206.6 MB. Free memory was 170.9 MB in the beginning and 127.2 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3548.25 ms. Allocated memory was 206.6 MB in the beginning and 247.5 MB in the end (delta: 40.9 MB). Free memory was 126.6 MB in the beginning and 130.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L525] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L532] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L533] COND FALSE !(t == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L539] COND TRUE \read(flag) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L540] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 71 SDslu, 179 SDs, 0 SdLazy, 132 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 116 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 3902 SizeOfPredicates, 15 NumberOfNonLiveVariables, 381 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...