/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:44:18,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:44:18,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:44:18,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:44:18,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:44:18,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:44:18,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:44:18,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:44:18,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:44:18,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:44:18,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:44:18,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:44:18,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:44:18,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:44:18,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:44:18,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:44:18,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:44:18,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:44:18,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:44:18,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:44:18,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:44:18,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:44:18,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:44:18,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:44:18,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:44:18,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:44:18,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:44:18,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:44:18,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:44:18,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:44:18,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:44:18,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:44:18,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:44:18,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:44:18,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:44:18,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:44:18,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:44:18,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:44:18,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:44:18,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:44:18,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:44:18,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:44:18,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:44:18,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:44:18,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:44:18,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:44:18,629 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:44:18,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:44:18,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:44:18,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:44:18,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:44:18,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:44:18,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:44:18,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:44:18,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:44:18,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:44:18,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:44:18,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:44:18,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:44:18,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:44:18,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:44:18,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:44:18,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:44:18,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:18,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:44:18,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:44:18,636 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:44:18,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:44:18,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:44:18,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:44:18,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:44:18,983 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:44:18,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-21 15:44:19,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21a637fdd/3f27dcaa41f149aeb10dba2da5117a92/FLAG1017ecfe3 [2020-08-21 15:44:19,586 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:44:19,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-21 15:44:19,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21a637fdd/3f27dcaa41f149aeb10dba2da5117a92/FLAG1017ecfe3 [2020-08-21 15:44:19,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21a637fdd/3f27dcaa41f149aeb10dba2da5117a92 [2020-08-21 15:44:19,931 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:44:19,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:44:19,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:19,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:44:19,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:44:19,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:19" (1/1) ... [2020-08-21 15:44:19,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2905bd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:19, skipping insertion in model container [2020-08-21 15:44:19,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:19" (1/1) ... [2020-08-21 15:44:19,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:44:19,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:44:20,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:20,439 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:44:20,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:20,565 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:44:20,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20 WrapperNode [2020-08-21 15:44:20,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:20,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:44:20,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:44:20,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:44:20,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... [2020-08-21 15:44:20,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:44:20,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:44:20,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:44:20,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:44:20,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:44:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:44:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-08-21 15:44:20,719 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-08-21 15:44:20,720 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-08-21 15:44:20,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:44:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:44:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 15:44:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 15:44:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 15:44:20,721 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 15:44:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 15:44:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 15:44:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 15:44:20,723 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 15:44:20,724 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 15:44:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 15:44:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 15:44:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 15:44:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 15:44:20,726 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 15:44:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 15:44:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 15:44:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 15:44:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 15:44:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 15:44:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 15:44:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 15:44:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 15:44:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 15:44:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 15:44:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 15:44:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 15:44:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 15:44:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 15:44:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 15:44:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:44:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 15:44:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 15:44:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 15:44:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 15:44:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 15:44:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 15:44:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 15:44:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 15:44:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 15:44:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 15:44:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 15:44:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 15:44:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 15:44:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 15:44:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 15:44:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 15:44:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 15:44:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 15:44:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 15:44:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:44:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 15:44:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-08-21 15:44:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 15:44:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 15:44:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-08-21 15:44:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-08-21 15:44:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:44:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:44:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:44:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:44:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:44:21,628 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:44:21,628 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-21 15:44:21,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:21 BoogieIcfgContainer [2020-08-21 15:44:21,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:44:21,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:44:21,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:44:21,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:44:21,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:44:19" (1/3) ... [2020-08-21 15:44:21,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6333a8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:21, skipping insertion in model container [2020-08-21 15:44:21,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:20" (2/3) ... [2020-08-21 15:44:21,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6333a8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:21, skipping insertion in model container [2020-08-21 15:44:21,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:21" (3/3) ... [2020-08-21 15:44:21,642 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-08-21 15:44:21,653 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:44:21,662 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:44:21,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:44:21,703 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:44:21,703 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:44:21,704 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:44:21,704 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:44:21,704 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:44:21,704 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:44:21,704 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:44:21,705 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:44:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-08-21 15:44:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 15:44:21,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:21,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:21,733 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times [2020-08-21 15:44:21,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:21,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170388265] [2020-08-21 15:44:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:21,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170388265] [2020-08-21 15:44:21,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:21,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:21,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877375763] [2020-08-21 15:44:21,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:21,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:21,963 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-08-21 15:44:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,269 INFO L93 Difference]: Finished difference Result 240 states and 408 transitions. [2020-08-21 15:44:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:22,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-21 15:44:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,300 INFO L225 Difference]: With dead ends: 240 [2020-08-21 15:44:22,300 INFO L226 Difference]: Without dead ends: 118 [2020-08-21 15:44:22,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-21 15:44:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-08-21 15:44:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 15:44:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2020-08-21 15:44:22,371 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13 [2020-08-21 15:44:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,371 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2020-08-21 15:44:22,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2020-08-21 15:44:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 15:44:22,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:22,373 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times [2020-08-21 15:44:22,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670607644] [2020-08-21 15:44:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:22,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670607644] [2020-08-21 15:44:22,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:22,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:44:22,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738566930] [2020-08-21 15:44:22,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:44:22,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:22,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:44:22,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:44:22,462 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states. [2020-08-21 15:44:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:22,740 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2020-08-21 15:44:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:44:22,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 15:44:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:22,743 INFO L225 Difference]: With dead ends: 206 [2020-08-21 15:44:22,744 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 15:44:22,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:44:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 15:44:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-08-21 15:44:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 15:44:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-08-21 15:44:22,763 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14 [2020-08-21 15:44:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:22,763 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-08-21 15:44:22,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:44:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-08-21 15:44:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:22,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:22,765 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:22,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:44:22,765 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:22,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times [2020-08-21 15:44:22,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:22,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136547357] [2020-08-21 15:44:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:22,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136547357] [2020-08-21 15:44:22,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:22,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:44:22,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944427854] [2020-08-21 15:44:22,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:44:22,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:44:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:44:22,959 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states. [2020-08-21 15:44:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:23,561 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-08-21 15:44:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:44:23,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 15:44:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:23,565 INFO L225 Difference]: With dead ends: 157 [2020-08-21 15:44:23,566 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 15:44:23,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:44:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 15:44:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108. [2020-08-21 15:44:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 15:44:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2020-08-21 15:44:23,605 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20 [2020-08-21 15:44:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:23,605 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2020-08-21 15:44:23,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:44:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2020-08-21 15:44:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:44:23,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:23,609 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:23,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:44:23,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times [2020-08-21 15:44:23,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:23,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098154206] [2020-08-21 15:44:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 15:44:23,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098154206] [2020-08-21 15:44:23,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:23,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:44:23,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614587676] [2020-08-21 15:44:23,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:44:23,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:44:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:44:23,768 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states. [2020-08-21 15:44:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:24,208 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-08-21 15:44:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:24,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-21 15:44:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:24,211 INFO L225 Difference]: With dead ends: 116 [2020-08-21 15:44:24,212 INFO L226 Difference]: Without dead ends: 113 [2020-08-21 15:44:24,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-21 15:44:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-08-21 15:44:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 15:44:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2020-08-21 15:44:24,224 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27 [2020-08-21 15:44:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:24,224 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2020-08-21 15:44:24,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:44:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2020-08-21 15:44:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:44:24,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:24,226 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:24,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:44:24,226 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times [2020-08-21 15:44:24,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:24,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589835783] [2020-08-21 15:44:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 15:44:24,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589835783] [2020-08-21 15:44:24,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:24,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:44:24,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199732965] [2020-08-21 15:44:24,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:44:24,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:24,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:44:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:44:24,320 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states. [2020-08-21 15:44:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:24,725 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-08-21 15:44:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:44:24,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-21 15:44:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:24,730 INFO L225 Difference]: With dead ends: 115 [2020-08-21 15:44:24,730 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 15:44:24,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 15:44:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-08-21 15:44:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-08-21 15:44:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2020-08-21 15:44:24,742 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27 [2020-08-21 15:44:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:24,743 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2020-08-21 15:44:24,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:44:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2020-08-21 15:44:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 15:44:24,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:24,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:24,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:44:24,744 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times [2020-08-21 15:44:24,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:24,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883141687] [2020-08-21 15:44:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:24,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883141687] [2020-08-21 15:44:24,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:24,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:44:24,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557529923] [2020-08-21 15:44:24,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:44:24,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:44:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:24,846 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states. [2020-08-21 15:44:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:25,464 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2020-08-21 15:44:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:44:25,465 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-21 15:44:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:25,467 INFO L225 Difference]: With dead ends: 147 [2020-08-21 15:44:25,467 INFO L226 Difference]: Without dead ends: 144 [2020-08-21 15:44:25,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:44:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-08-21 15:44:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-08-21 15:44:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 15:44:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-08-21 15:44:25,481 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30 [2020-08-21 15:44:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:25,481 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-08-21 15:44:25,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:44:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-08-21 15:44:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 15:44:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:25,483 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:25,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:44:25,483 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times [2020-08-21 15:44:25,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:25,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733990381] [2020-08-21 15:44:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:25,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:25,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733990381] [2020-08-21 15:44:25,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:25,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 15:44:25,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075776793] [2020-08-21 15:44:25,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:44:25,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:44:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:44:25,591 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 9 states. [2020-08-21 15:44:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:26,197 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2020-08-21 15:44:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:44:26,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-21 15:44:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:26,204 INFO L225 Difference]: With dead ends: 146 [2020-08-21 15:44:26,204 INFO L226 Difference]: Without dead ends: 143 [2020-08-21 15:44:26,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:44:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-21 15:44:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-08-21 15:44:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-21 15:44:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2020-08-21 15:44:26,225 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30 [2020-08-21 15:44:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:26,225 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2020-08-21 15:44:26,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:44:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2020-08-21 15:44:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 15:44:26,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:26,228 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:26,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:44:26,229 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:26,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:26,230 INFO L82 PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times [2020-08-21 15:44:26,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:26,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550383269] [2020-08-21 15:44:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:44:26,279 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:44:26,279 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:44:26,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:44:26,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:26 BoogieIcfgContainer [2020-08-21 15:44:26,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:26,307 INFO L168 Benchmark]: Toolchain (without parser) took 6373.36 ms. Allocated memory was 143.1 MB in the beginning and 277.9 MB in the end (delta: 134.7 MB). Free memory was 103.2 MB in the beginning and 218.8 MB in the end (delta: -115.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,307 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.77 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 103.0 MB in the beginning and 167.2 MB in the end (delta: -64.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,309 INFO L168 Benchmark]: Boogie Preprocessor took 84.62 ms. Allocated memory is still 204.5 MB. Free memory was 167.2 MB in the beginning and 163.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,310 INFO L168 Benchmark]: RCFGBuilder took 981.47 ms. Allocated memory was 204.5 MB in the beginning and 232.8 MB in the end (delta: 28.3 MB). Free memory was 163.5 MB in the beginning and 201.1 MB in the end (delta: -37.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,311 INFO L168 Benchmark]: TraceAbstraction took 4669.09 ms. Allocated memory was 232.8 MB in the beginning and 277.9 MB in the end (delta: 45.1 MB). Free memory was 199.8 MB in the beginning and 218.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:26,315 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 632.77 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 103.0 MB in the beginning and 167.2 MB in the end (delta: -64.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 84.62 ms. Allocated memory is still 204.5 MB. Free memory was 167.2 MB in the beginning and 163.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 981.47 ms. Allocated memory was 204.5 MB in the beginning and 232.8 MB in the end (delta: 28.3 MB). Free memory was 163.5 MB in the beginning and 201.1 MB in the end (delta: -37.6 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4669.09 ms. Allocated memory was 232.8 MB in the beginning and 277.9 MB in the end (delta: 45.1 MB). Free memory was 199.8 MB in the beginning and 218.8 MB in the end (delta: -18.9 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); [L630] COND FALSE !(!node) [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); [L635] COND FALSE !(!item) [L637] item->slist = node [L638] item->next = data [L639] data = item [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) [L643] CALL inspect_before(data) [L604] COND FALSE !(!(shape)) [L605] shape->next [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) [L612] EXPR shape->next [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 949 SDslu, 966 SDs, 0 SdLazy, 2089 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=7, 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, 7 MinimizatonAttempts, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 16950 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 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...