/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-token-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:23:27,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:23:27,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:23:27,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:23:27,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:23:27,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:23:27,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:23:27,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:23:27,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:23:27,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:23:27,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:23:27,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:23:27,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:23:27,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:23:27,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:23:27,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:23:27,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:23:27,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:23:27,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:23:27,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:23:27,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:23:27,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:23:27,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:23:27,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:23:27,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:23:27,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:23:27,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:23:27,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:23:27,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:23:27,457 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:23:27,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:23:27,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:23:27,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:23:27,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:23:27,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:23:27,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:23:27,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:23:27,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:23:27,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:23:27,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:23:27,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:23:27,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:23:27,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:23:27,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:23:27,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:23:27,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:23:27,483 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:23:27,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:23:27,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:23:27,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:23:27,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:23:27,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:23:27,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:23:27,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:23:27,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:23:27,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:23:27,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:23:27,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:23:27,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:23:27,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:23:27,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:23:27,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:23:27,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:23:27,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:27,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:23:27,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:23:27,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:23:27,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:23:27,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:23:27,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:23:27,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:23:27,785 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:23:27,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 11:23:27,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b696d38/61668094120f4c61ba3573cbbbe86bd7/FLAG48bcfe5a7 [2020-07-21 11:23:28,491 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:23:28,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-token-2.i [2020-07-21 11:23:28,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b696d38/61668094120f4c61ba3573cbbbe86bd7/FLAG48bcfe5a7 [2020-07-21 11:23:28,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b696d38/61668094120f4c61ba3573cbbbe86bd7 [2020-07-21 11:23:28,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:23:28,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:23:28,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:28,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:23:28,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:23:28,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:28" (1/1) ... [2020-07-21 11:23:28,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49accd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:28, skipping insertion in model container [2020-07-21 11:23:28,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:23:28" (1/1) ... [2020-07-21 11:23:28,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:23:28,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:23:29,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:29,314 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:23:29,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:23:29,412 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:23:29,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29 WrapperNode [2020-07-21 11:23:29,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:23:29,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:23:29,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:23:29,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:23:29,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... [2020-07-21 11:23:29,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:23:29,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:23:29,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:23:29,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:23:29,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:23:29,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:23:29,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:23:29,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:23:29,552 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:23:29,553 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:23:29,553 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:23:29,553 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:23:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:23:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:23:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:23:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:23:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:23:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:23:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:23:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:23:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:23:29,556 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:23:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:23:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:23:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:23:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:23:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:23:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:23:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:23:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:23:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:23:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:23:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:23:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:23:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:23:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:23:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:23:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:23:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:23:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:23:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:23:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:23:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:23:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:23:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:23:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:23:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:23:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:23:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:23:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:23:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:23:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:23:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:23:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:23:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:23:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:23:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:23:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:23:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:23:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:23:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:23:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:23:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:23:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:23:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:23:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:23:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:23:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:23:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:23:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:23:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:23:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:23:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:23:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:23:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:23:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:23:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:23:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:23:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:23:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:23:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:23:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:23:30,219 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:23:30,220 INFO L295 CfgBuilder]: Removed 15 assume(true) statements. [2020-07-21 11:23:30,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:30 BoogieIcfgContainer [2020-07-21 11:23:30,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:23:30,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:23:30,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:23:30,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:23:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:23:28" (1/3) ... [2020-07-21 11:23:30,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce73bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:30, skipping insertion in model container [2020-07-21 11:23:30,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:23:29" (2/3) ... [2020-07-21 11:23:30,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce73bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:23:30, skipping insertion in model container [2020-07-21 11:23:30,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:23:30" (3/3) ... [2020-07-21 11:23:30,233 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-07-21 11:23:30,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:23:30,253 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-21 11:23:30,268 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-21 11:23:30,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:23:30,293 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:23:30,293 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:23:30,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:23:30,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:23:30,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:23:30,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:23:30,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:23:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-07-21 11:23:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 11:23:30,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:30,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:30,321 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash 68430596, now seen corresponding path program 1 times [2020-07-21 11:23:30,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:30,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632759138] [2020-07-21 11:23:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:23:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:30,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:30,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632759138] [2020-07-21 11:23:30,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:30,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:23:30,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857532991] [2020-07-21 11:23:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:23:30,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:23:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:23:30,598 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2020-07-21 11:23:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:30,621 INFO L93 Difference]: Finished difference Result 92 states and 138 transitions. [2020-07-21 11:23:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:23:30,623 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 11:23:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:30,633 INFO L225 Difference]: With dead ends: 92 [2020-07-21 11:23:30,633 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 11:23:30,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:23:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 11:23:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 11:23:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 11:23:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-07-21 11:23:30,680 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 10 [2020-07-21 11:23:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:30,680 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-07-21 11:23:30,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:23:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-07-21 11:23:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 11:23:30,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:30,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:30,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:30,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 67663975, now seen corresponding path program 1 times [2020-07-21 11:23:30,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:30,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120486095] [2020-07-21 11:23:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:23:30,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:31,059 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 11:23:31,059 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,068 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,069 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 11:23:31,123 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,124 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 11:23:31,125 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:31,129 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,140 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:31,146 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,154 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:31,156 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:31,157 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 11:23:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:31,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:31,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120486095] [2020-07-21 11:23:31,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:31,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:23:31,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915507467] [2020-07-21 11:23:31,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:23:31,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:23:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:23:31,167 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2020-07-21 11:23:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:31,248 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-21 11:23:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:23:31,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 11:23:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:31,250 INFO L225 Difference]: With dead ends: 43 [2020-07-21 11:23:31,250 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 11:23:31,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 11:23:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 11:23:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 11:23:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-21 11:23:31,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 10 [2020-07-21 11:23:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-21 11:23:31,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:23:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-21 11:23:31,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:23:31,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:31,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:31,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:31,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2097539711, now seen corresponding path program 1 times [2020-07-21 11:23:31,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:31,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116247596] [2020-07-21 11:23:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:23:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:31,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:31,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116247596] [2020-07-21 11:23:31,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:31,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:23:31,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999149758] [2020-07-21 11:23:31,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:23:31,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:23:31,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:23:31,613 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-07-21 11:23:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:31,687 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-21 11:23:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:23:31,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-21 11:23:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:31,689 INFO L225 Difference]: With dead ends: 67 [2020-07-21 11:23:31,689 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 11:23:31,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 11:23:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2020-07-21 11:23:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 11:23:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-21 11:23:31,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2020-07-21 11:23:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:31,697 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-21 11:23:31,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:23:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-21 11:23:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:23:31,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:31,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:31,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:31,916 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:31,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -409997773, now seen corresponding path program 1 times [2020-07-21 11:23:31,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:31,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005708962] [2020-07-21 11:23:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:32,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:23:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:32,062 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-21 11:23:32,063 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,066 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,066 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,067 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-21 11:23:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:32,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:32,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005708962] [2020-07-21 11:23:32,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:32,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:23:32,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617904550] [2020-07-21 11:23:32,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:23:32,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:23:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:32,088 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-07-21 11:23:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:32,231 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 11:23:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:23:32,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 11:23:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:32,233 INFO L225 Difference]: With dead ends: 39 [2020-07-21 11:23:32,233 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 11:23:32,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:23:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 11:23:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 11:23:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 11:23:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-07-21 11:23:32,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 16 [2020-07-21 11:23:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:32,243 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-07-21 11:23:32,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:23:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-07-21 11:23:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:23:32,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:32,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:32,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:32,458 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -409960037, now seen corresponding path program 1 times [2020-07-21 11:23:32,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:32,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145600043] [2020-07-21 11:23:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:23:32,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:23:32,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:23:32,562 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 11:23:32,563 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,570 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,570 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,571 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 11:23:32,639 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,640 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 11:23:32,642 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:23:32,642 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,686 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,691 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_int_30|], 2=[|v_#memory_int_28|, |v_#memory_int_29|, |v_#memory_$Pointer$.offset_21|, |v_#memory_$Pointer$.base_22|]} [2020-07-21 11:23:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:32,717 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2020-07-21 11:23:32,718 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,754 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,762 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:32,786 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,905 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-07-21 11:23:32,906 INFO L350 Elim1Store]: treesize reduction 154, result has 52.9 percent of original size [2020-07-21 11:23:32,907 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 245 [2020-07-21 11:23:32,908 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,951 INFO L624 ElimStorePlain]: treesize reduction 154, result has 37.4 percent of original size [2020-07-21 11:23:32,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:32,955 INFO L544 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,966 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 11:23:32,978 INFO L544 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-07-21 11:23:32,987 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:23:32,989 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 11:23:32,990 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:153, output treesize:23 [2020-07-21 11:23:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:23:33,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:23:33,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145600043] [2020-07-21 11:23:33,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:23:33,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:23:33,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143501837] [2020-07-21 11:23:33,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:23:33,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:23:33,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:23:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:23:33,036 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-07-21 11:23:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:23:33,259 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-21 11:23:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:23:33,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 11:23:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:23:33,262 INFO L225 Difference]: With dead ends: 72 [2020-07-21 11:23:33,263 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 11:23:33,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:23:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 11:23:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-21 11:23:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 11:23:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-07-21 11:23:33,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 16 [2020-07-21 11:23:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:23:33,279 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-07-21 11:23:33,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:23:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-07-21 11:23:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:23:33,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:23:33,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:23:33,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:33,482 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:23:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:23:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1407314597, now seen corresponding path program 1 times [2020-07-21 11:23:33,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:23:33,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950039400] [2020-07-21 11:23:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:33,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:23:33,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:23:33,681 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:23:33,682 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:23:33,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:23:33,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:23:33 BoogieIcfgContainer [2020-07-21 11:23:33,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:23:33,917 INFO L168 Benchmark]: Toolchain (without parser) took 5175.66 ms. Allocated memory was 142.6 MB in the beginning and 248.0 MB in the end (delta: 105.4 MB). Free memory was 101.4 MB in the beginning and 96.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 110.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,918 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 11:23:33,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 669.06 ms. Allocated memory was 142.6 MB in the beginning and 203.4 MB in the end (delta: 60.8 MB). Free memory was 101.0 MB in the beginning and 170.4 MB in the end (delta: -69.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,919 INFO L168 Benchmark]: Boogie Preprocessor took 69.00 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 167.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,920 INFO L168 Benchmark]: RCFGBuilder took 741.76 ms. Allocated memory is still 203.4 MB. Free memory was 167.4 MB in the beginning and 119.6 MB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,921 INFO L168 Benchmark]: TraceAbstraction took 3689.99 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 119.6 MB in the beginning and 96.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:23:33,924 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.6 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 669.06 ms. Allocated memory was 142.6 MB in the beginning and 203.4 MB in the end (delta: 60.8 MB). Free memory was 101.0 MB in the beginning and 170.4 MB in the end (delta: -69.4 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.00 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 167.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 741.76 ms. Allocated memory is still 203.4 MB. Free memory was 167.4 MB in the beginning and 119.6 MB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3689.99 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 119.6 MB in the beginning and 96.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, x={-1:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}] [L1017] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}] [L1019] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}, x->data=1] [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-1:0}, x->data=1] [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}, x->data=2] [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, x={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 91 SDslu, 204 SDs, 0 SdLazy, 135 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 58 ConstructedInterpolants, 4 QuantifiedInterpolants, 3271 SizeOfPredicates, 14 NumberOfNonLiveVariables, 408 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...