/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:56:52,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:56:52,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:56:52,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:56:52,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:56:52,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:56:52,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:56:52,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:56:52,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:56:52,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:56:52,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:56:52,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:56:52,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:56:52,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:56:52,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:56:52,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:56:52,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:56:52,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:56:52,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:56:52,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:56:52,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:56:52,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:56:52,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:56:52,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:56:52,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:56:52,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:56:52,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:56:52,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:56:52,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:56:52,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:56:52,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:56:52,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:56:52,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:56:52,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:56:52,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:56:52,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:56:52,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:56:52,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:56:52,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:56:52,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:56:52,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:56:52,481 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 14:56:52,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:56:52,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:56:52,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:56:52,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:56:52,505 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:56:52,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:56:52,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:56:52,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:56:52,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:56:52,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:56:52,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:56:52,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:56:52,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:56:52,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:56:52,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:56:52,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:56:52,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:52,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:56:52,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:56:52,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:56:52,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:56:52,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:56:52,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:56:52,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:56:52,510 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:56:52,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:56:52,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:56:52,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:56:52,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:56:52,839 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:56:52,840 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-21 14:56:52,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3957f1053/b3bb1fcab62b4107a0dc8ba0291876b4/FLAGc7497c2d3 [2020-08-21 14:56:53,527 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:53,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-08-21 14:56:53,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3957f1053/b3bb1fcab62b4107a0dc8ba0291876b4/FLAGc7497c2d3 [2020-08-21 14:56:53,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3957f1053/b3bb1fcab62b4107a0dc8ba0291876b4 [2020-08-21 14:56:53,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:53,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:53,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:53,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:53,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:53,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:53" (1/1) ... [2020-08-21 14:56:53,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53beef41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:53, skipping insertion in model container [2020-08-21 14:56:53,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:53" (1/1) ... [2020-08-21 14:56:53,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:53,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:54,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:54,312 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:54,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:54,413 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:54,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54 WrapperNode [2020-08-21 14:56:54,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:54,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:54,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:54,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:54,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (1/1) ... [2020-08-21 14:56:54,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:54,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:54,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:54,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:54,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (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 14:56:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:54,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 14:56:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 14:56:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 14:56:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 14:56:54,547 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 14:56:54,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 14:56:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 14:56:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 14:56:54,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 14:56:54,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 14:56:54,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 14:56:54,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 14:56:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 14:56:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 14:56:54,557 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 14:56:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 14:56:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 14:56:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 14:56:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 14:56:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 14:56:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 14:56:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 14:56:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:56:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:55,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:55,235 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-08-21 14:56:55,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:55 BoogieIcfgContainer [2020-08-21 14:56:55,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:55,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:55,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:55,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:55,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:53" (1/3) ... [2020-08-21 14:56:55,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f6389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:55, skipping insertion in model container [2020-08-21 14:56:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:54" (2/3) ... [2020-08-21 14:56:55,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f6389c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:55, skipping insertion in model container [2020-08-21 14:56:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:55" (3/3) ... [2020-08-21 14:56:55,248 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-08-21 14:56:55,259 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:55,267 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-08-21 14:56:55,282 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-08-21 14:56:55,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:55,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:55,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:55,311 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:55,315 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:55,315 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:55,315 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:55,315 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-21 14:56:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-08-21 14:56:55,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:55,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:55,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-08-21 14:56:55,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:55,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52730930] [2020-08-21 14:56:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:55,590 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 14:56:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52730930] [2020-08-21 14:56:55,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:55,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:56:55,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275475460] [2020-08-21 14:56:55,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:56:55,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:56:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:55,619 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-21 14:56:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:55,901 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-08-21 14:56:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:56:55,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-08-21 14:56:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:55,915 INFO L225 Difference]: With dead ends: 186 [2020-08-21 14:56:55,915 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 14:56:55,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 14:56:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-08-21 14:56:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 14:56:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-21 14:56:55,967 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-08-21 14:56:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:55,968 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-21 14:56:55,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:56:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-21 14:56:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:56:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:55,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:55,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:55,970 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-08-21 14:56:55,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:55,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359062567] [2020-08-21 14:56:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,073 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 14:56:56,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359062567] [2020-08-21 14:56:56,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:56,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:56:56,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500177647] [2020-08-21 14:56:56,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:56:56,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:56:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:56,077 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-08-21 14:56:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:56,254 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-21 14:56:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:56:56,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 14:56:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:56,257 INFO L225 Difference]: With dead ends: 84 [2020-08-21 14:56:56,257 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 14:56:56,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 14:56:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-21 14:56:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 14:56:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-08-21 14:56:56,271 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 14 [2020-08-21 14:56:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:56,271 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-08-21 14:56:56,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:56:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-08-21 14:56:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:56:56,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:56,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:56,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:56,273 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-08-21 14:56:56,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:56,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821886117] [2020-08-21 14:56:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,365 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 14:56:56,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821886117] [2020-08-21 14:56:56,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:56,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:56:56,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993246287] [2020-08-21 14:56:56,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:56:56,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:56:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:56,368 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 5 states. [2020-08-21 14:56:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:56,609 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2020-08-21 14:56:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:56,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:56:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:56,611 INFO L225 Difference]: With dead ends: 138 [2020-08-21 14:56:56,612 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 14:56:56,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 14:56:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-08-21 14:56:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 14:56:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-08-21 14:56:56,622 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 14 [2020-08-21 14:56:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:56,623 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-08-21 14:56:56,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:56:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-08-21 14:56:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:56:56,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:56,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:56,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:56:56,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-08-21 14:56:56,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:56,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066420734] [2020-08-21 14:56:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,695 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 14:56:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066420734] [2020-08-21 14:56:56,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:56,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:56:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481232745] [2020-08-21 14:56:56,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:56:56,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:56:56,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:56,698 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 5 states. [2020-08-21 14:56:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:56,857 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-08-21 14:56:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:56:56,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:56:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:56,859 INFO L225 Difference]: With dead ends: 84 [2020-08-21 14:56:56,859 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 14:56:56,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 14:56:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 14:56:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:56:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-08-21 14:56:56,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 14 [2020-08-21 14:56:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:56,869 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-08-21 14:56:56,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:56:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-08-21 14:56:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:56,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:56,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:56,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:56:56,870 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 177734485, now seen corresponding path program 1 times [2020-08-21 14:56:56,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:56,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686013153] [2020-08-21 14:56:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:56,952 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 14:56:56,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686013153] [2020-08-21 14:56:56,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:56,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:56:56,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74270344] [2020-08-21 14:56:56,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:56:56,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:56:56,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:56,954 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 5 states. [2020-08-21 14:56:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:57,160 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2020-08-21 14:56:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:56:57,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 14:56:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:57,161 INFO L225 Difference]: With dead ends: 199 [2020-08-21 14:56:57,162 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 14:56:57,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 14:56:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2020-08-21 14:56:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 14:56:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-08-21 14:56:57,171 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 19 [2020-08-21 14:56:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:57,171 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-08-21 14:56:57,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:56:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-08-21 14:56:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:57,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:57,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:57,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:56:57,173 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-08-21 14:56:57,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:57,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556684918] [2020-08-21 14:56:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,266 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 14:56:57,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556684918] [2020-08-21 14:56:57,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:57,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:57,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686029585] [2020-08-21 14:56:57,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:57,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:57,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:57,268 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 6 states. [2020-08-21 14:56:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:57,489 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-08-21 14:56:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:57,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 14:56:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:57,490 INFO L225 Difference]: With dead ends: 126 [2020-08-21 14:56:57,491 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 14:56:57,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:56:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 14:56:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-08-21 14:56:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 14:56:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-08-21 14:56:57,498 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 19 [2020-08-21 14:56:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:57,498 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-08-21 14:56:57,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-08-21 14:56:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:57,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:57,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:57,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:56:57,500 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:57,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-08-21 14:56:57,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:57,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140716345] [2020-08-21 14:56:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,564 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 14:56:57,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140716345] [2020-08-21 14:56:57,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:57,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:57,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828864334] [2020-08-21 14:56:57,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:57,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:57,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:57,567 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-08-21 14:56:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:57,781 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-08-21 14:56:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:56:57,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-21 14:56:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:57,783 INFO L225 Difference]: With dead ends: 136 [2020-08-21 14:56:57,784 INFO L226 Difference]: Without dead ends: 116 [2020-08-21 14:56:57,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:56:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-21 14:56:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-08-21 14:56:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:56:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-08-21 14:56:57,803 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 20 [2020-08-21 14:56:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:57,804 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-08-21 14:56:57,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-08-21 14:56:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:57,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:57,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:57,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:56:57,806 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:57,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-08-21 14:56:57,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:57,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749562886] [2020-08-21 14:56:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:57,886 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 14:56:57,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749562886] [2020-08-21 14:56:57,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:57,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:56:57,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96727176] [2020-08-21 14:56:57,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:56:57,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:56:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:57,888 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-08-21 14:56:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:58,034 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-08-21 14:56:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:56:58,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-21 14:56:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:58,036 INFO L225 Difference]: With dead ends: 141 [2020-08-21 14:56:58,036 INFO L226 Difference]: Without dead ends: 100 [2020-08-21 14:56:58,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-21 14:56:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2020-08-21 14:56:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 14:56:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-08-21 14:56:58,042 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 24 [2020-08-21 14:56:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:58,043 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-08-21 14:56:58,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:56:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-08-21 14:56:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:56:58,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:58,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:58,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:56:58,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-08-21 14:56:58,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927450619] [2020-08-21 14:56:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,083 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 14:56:58,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927450619] [2020-08-21 14:56:58,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:58,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:56:58,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417524640] [2020-08-21 14:56:58,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:56:58,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:56:58,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:58,086 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-08-21 14:56:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:58,195 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-08-21 14:56:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:56:58,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-21 14:56:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:58,197 INFO L225 Difference]: With dead ends: 79 [2020-08-21 14:56:58,197 INFO L226 Difference]: Without dead ends: 77 [2020-08-21 14:56:58,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:56:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-21 14:56:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-08-21 14:56:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 14:56:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-08-21 14:56:58,203 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 25 [2020-08-21 14:56:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:58,204 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-08-21 14:56:58,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:56:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-08-21 14:56:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:56:58,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:58,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:58,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:56:58,205 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:58,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-08-21 14:56:58,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:58,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115047789] [2020-08-21 14:56:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,262 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 14:56:58,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115047789] [2020-08-21 14:56:58,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:58,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:56:58,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773853601] [2020-08-21 14:56:58,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:56:58,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:56:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:58,265 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2020-08-21 14:56:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:58,406 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-08-21 14:56:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:56:58,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 14:56:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:58,408 INFO L225 Difference]: With dead ends: 78 [2020-08-21 14:56:58,408 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:56:58,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:56:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:56:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-21 14:56:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 14:56:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-08-21 14:56:58,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 27 [2020-08-21 14:56:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:58,414 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-08-21 14:56:58,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:56:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-08-21 14:56:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:58,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:58,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:58,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:56:58,416 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:58,416 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-08-21 14:56:58,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:58,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465831897] [2020-08-21 14:56:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:58,490 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 14:56:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465831897] [2020-08-21 14:56:58,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:58,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:56:58,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239200146] [2020-08-21 14:56:58,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:56:58,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:56:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:56:58,493 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 6 states. [2020-08-21 14:56:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:58,812 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2020-08-21 14:56:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:56:58,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-08-21 14:56:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:58,813 INFO L225 Difference]: With dead ends: 179 [2020-08-21 14:56:58,813 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 14:56:58,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:56:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 14:56:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-08-21 14:56:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 14:56:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-08-21 14:56:58,821 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-08-21 14:56:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:58,821 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-08-21 14:56:58,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:56:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-08-21 14:56:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:56:58,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:58,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:58,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:56:58,823 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-08-21 14:56:58,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:58,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475867424] [2020-08-21 14:56:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:59,140 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 14:56:59,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475867424] [2020-08-21 14:56:59,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:59,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:56:59,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764263688] [2020-08-21 14:56:59,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:56:59,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:59,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:56:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:56:59,142 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 9 states. [2020-08-21 14:56:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:59,921 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-08-21 14:56:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:56:59,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-21 14:56:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:59,925 INFO L225 Difference]: With dead ends: 182 [2020-08-21 14:56:59,926 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 14:56:59,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:56:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 14:56:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2020-08-21 14:56:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 14:56:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-08-21 14:56:59,935 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 28 [2020-08-21 14:56:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:59,935 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-08-21 14:56:59,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:56:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-08-21 14:56:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:56:59,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:59,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:59,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:56:59,937 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-08-21 14:56:59,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:59,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906332774] [2020-08-21 14:56:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:59,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:57:00,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906332774] [2020-08-21 14:57:00,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:57:00,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:57:00,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915784782] [2020-08-21 14:57:00,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:57:00,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:57:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:57:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:57:00,003 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 5 states. [2020-08-21 14:57:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:57:00,238 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-08-21 14:57:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:57:00,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-21 14:57:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:57:00,240 INFO L225 Difference]: With dead ends: 150 [2020-08-21 14:57:00,240 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 14:57:00,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:57:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 14:57:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-21 14:57:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 14:57:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2020-08-21 14:57:00,248 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 30 [2020-08-21 14:57:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:57:00,249 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2020-08-21 14:57:00,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:57:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2020-08-21 14:57:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 14:57:00,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:00,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:00,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:57:00,251 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash -753501909, now seen corresponding path program 1 times [2020-08-21 14:57:00,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:00,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50609531] [2020-08-21 14:57:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:00,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:57:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:57:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:57:00,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50609531] [2020-08-21 14:57:00,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:57:00,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:57:00,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986216893] [2020-08-21 14:57:00,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:57:00,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:57:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:57:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:57:00,291 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand 4 states. [2020-08-21 14:57:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:57:00,427 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2020-08-21 14:57:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:57:00,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-08-21 14:57:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:57:00,429 INFO L225 Difference]: With dead ends: 124 [2020-08-21 14:57:00,429 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 14:57:00,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:57:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 14:57:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-08-21 14:57:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 14:57:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-08-21 14:57:00,438 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 30 [2020-08-21 14:57:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:57:00,438 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-08-21 14:57:00,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:57:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-08-21 14:57:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 14:57:00,439 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:57:00,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:57:00,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:57:00,440 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:57:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:57:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-08-21 14:57:00,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:57:00,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649790374] [2020-08-21 14:57:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:57:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:57:00,455 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:57:00,455 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:57:00,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:57:00,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:57:00 BoogieIcfgContainer [2020-08-21 14:57:00,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:57:00,481 INFO L168 Benchmark]: Toolchain (without parser) took 6715.51 ms. Allocated memory was 139.5 MB in the beginning and 291.5 MB in the end (delta: 152.0 MB). Free memory was 101.3 MB in the beginning and 216.3 MB in the end (delta: -114.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:00,482 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 14:57:00,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.96 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 169.6 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:00,483 INFO L168 Benchmark]: Boogie Preprocessor took 75.25 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 165.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:00,484 INFO L168 Benchmark]: RCFGBuilder took 750.02 ms. Allocated memory is still 202.9 MB. Free memory was 165.9 MB in the beginning and 110.6 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. [2020-08-21 14:57:00,485 INFO L168 Benchmark]: TraceAbstraction took 5237.02 ms. Allocated memory was 202.9 MB in the beginning and 291.5 MB in the end (delta: 88.6 MB). Free memory was 109.9 MB in the beginning and 216.3 MB in the end (delta: -106.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:57:00,488 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 647.96 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 101.1 MB in the beginning and 169.6 MB in the end (delta: -68.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.25 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 165.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 750.02 ms. Allocated memory is still 202.9 MB. Free memory was 165.9 MB in the beginning and 110.6 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5237.02 ms. Allocated memory was 202.9 MB in the beginning and 291.5 MB in the end (delta: 88.6 MB). Free memory was 109.9 MB in the beginning and 216.3 MB in the end (delta: -106.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) [L995] COND FALSE !(!(list != ((void*)0))) [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list [L1015] COND FALSE !(!(((void*)0) != end)) [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner [L1023] COND TRUE len == 0 [L1024] len = 1 [L1027] COND FALSE !(!(((void*)0) != inner)) [L1028] EXPR inner->inner [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1016 SDtfs, 1075 SDslu, 1380 SDs, 0 SdLazy, 1834 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=13, 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, 14 MinimizatonAttempts, 367 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 331 NumberOfCodeBlocks, 331 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 49886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 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...