/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-sorted-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:31:27,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:31:27,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:31:27,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:31:27,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:31:27,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:31:27,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:31:27,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:31:27,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:31:27,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:31:27,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:31:27,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:31:27,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:31:27,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:31:27,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:31:27,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:31:27,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:31:27,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:31:27,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:31:27,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:31:27,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:31:27,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:31:27,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:31:27,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:31:27,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:31:27,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:31:27,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:31:27,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:31:27,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:31:27,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:31:27,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:31:27,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:31:27,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:31:27,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:31:27,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:31:27,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:31:27,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:31:27,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:31:27,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:31:27,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:31:27,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:31:27,612 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 [2020-07-20 11:31:27,663 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:31:27,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:31:27,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:31:27,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:31:27,667 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:31:27,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:31:27,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:31:27,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:31:27,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:31:27,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:31:27,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:31:27,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:31:27,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:31:27,670 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:31:27,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:31:27,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:31:27,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:31:27,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:31:27,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:31:27,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:31:27,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:31:27,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:31:27,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:31:27,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:31:27,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:31:27,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:31:27,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:27,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:31:27,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:31:27,681 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 [2020-07-20 11:31:28,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:31:28,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:31:28,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:31:28,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:31:28,243 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:31:28,247 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-07-20 11:31:28,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5650cbf37/6482dea05bdc462294cb6cb7fd03e709/FLAGc61b42ddf [2020-07-20 11:31:29,376 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:31:29,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-07-20 11:31:29,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5650cbf37/6482dea05bdc462294cb6cb7fd03e709/FLAGc61b42ddf [2020-07-20 11:31:29,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5650cbf37/6482dea05bdc462294cb6cb7fd03e709 [2020-07-20 11:31:29,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:31:29,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:31:29,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:29,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:31:29,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:31:29,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208b9fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:29, skipping insertion in model container [2020-07-20 11:31:29,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:31:29" (1/1) ... [2020-07-20 11:31:29,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:31:29,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:31:30,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:30,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:31:30,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:31:30,587 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:31:30,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30 WrapperNode [2020-07-20 11:31:30,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:31:30,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:31:30,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:31:30,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:31:30,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (1/1) ... [2020-07-20 11:31:30,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:31:30,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:31:30,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:31:30,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:31:30,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (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 [2020-07-20 11:31:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:31:30,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:31:30,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:31:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 11:31:30,842 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 11:31:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 11:31:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 11:31:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 11:31:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 11:31:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 11:31:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 11:31:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 11:31:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 11:31:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 11:31:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 11:31:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 11:31:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 11:31:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 11:31:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 11:31:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 11:31:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 11:31:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 11:31:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 11:31:30,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 11:31:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 11:31:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 11:31:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 11:31:30,847 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 11:31:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 11:31:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 11:31:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 11:31:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 11:31:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 11:31:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 11:31:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 11:31:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 11:31:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 11:31:30,849 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 11:31:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 11:31:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 11:31:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 11:31:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 11:31:30,850 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 11:31:30,851 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:31:30,852 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:31:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 11:31:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:31:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 11:31:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 11:31:30,853 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 11:31:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 11:31:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 11:31:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:31:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 11:31:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 11:31:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 11:31:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 11:31:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 11:31:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 11:31:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 11:31:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 11:31:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 11:31:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 11:31:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 11:31:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 11:31:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 11:31:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 11:31:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 11:31:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 11:31:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 11:31:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 11:31:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 11:31:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 11:31:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 11:31:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 11:31:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 11:31:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 11:31:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 11:31:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 11:31:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 11:31:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 11:31:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 11:31:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 11:31:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 11:31:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 11:31:30,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:31:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 11:31:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:31:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:31:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:31:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:31:31,891 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:31:31,891 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-20 11:31:31,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:31 BoogieIcfgContainer [2020-07-20 11:31:31,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:31:31,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:31:31,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:31:31,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:31:31,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:31:29" (1/3) ... [2020-07-20 11:31:31,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac9ff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:31, skipping insertion in model container [2020-07-20 11:31:31,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:31:30" (2/3) ... [2020-07-20 11:31:31,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac9ff96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:31:31, skipping insertion in model container [2020-07-20 11:31:31,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:31:31" (3/3) ... [2020-07-20 11:31:31,915 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2020-07-20 11:31:31,935 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:31:31,951 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-07-20 11:31:31,975 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-07-20 11:31:32,020 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:31:32,021 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:31:32,021 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:31:32,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:31:32,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:31:32,022 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:31:32,022 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:31:32,022 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:31:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-20 11:31:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:31:32,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:32,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:32,077 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:32,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1780468538, now seen corresponding path program 1 times [2020-07-20 11:31:32,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:32,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146379826] [2020-07-20 11:31:32,109 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 [2020-07-20 11:31:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:31:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:32,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:32,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146379826] [2020-07-20 11:31:32,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:32,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:31:32,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030488069] [2020-07-20 11:31:32,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:31:32,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:32,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:31:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:31:32,550 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-20 11:31:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:32,591 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2020-07-20 11:31:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:31:32,593 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 11:31:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:32,607 INFO L225 Difference]: With dead ends: 112 [2020-07-20 11:31:32,608 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 11:31:32,614 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 [2020-07-20 11:31:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 11:31:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 11:31:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 11:31:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-07-20 11:31:32,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 10 [2020-07-20 11:31:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:32,681 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-07-20 11:31:32,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:31:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-07-20 11:31:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:31:32,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:32,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:32,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:32,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash -658139069, now seen corresponding path program 1 times [2020-07-20 11:31:32,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:32,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418349398] [2020-07-20 11:31:32,897 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 [2020-07-20 11:31:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:33,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:31:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:31:33,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:33,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418349398] [2020-07-20 11:31:33,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:33,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:31:33,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356096833] [2020-07-20 11:31:33,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:31:33,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:31:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:33,085 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 3 states. [2020-07-20 11:31:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:33,211 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-07-20 11:31:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:31:33,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 11:31:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:33,215 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:31:33,215 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 11:31:33,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:31:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 11:31:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-07-20 11:31:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 11:31:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-07-20 11:31:33,234 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 11 [2020-07-20 11:31:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:33,235 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-07-20 11:31:33,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:31:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-07-20 11:31:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:31:33,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:33,237 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:33,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:33,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:33,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1481014552, now seen corresponding path program 1 times [2020-07-20 11:31:33,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:33,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77708947] [2020-07-20 11:31:33,458 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 [2020-07-20 11:31:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:31:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:31:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:31:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:31:33,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:31:33,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77708947] [2020-07-20 11:31:33,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:31:33,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:31:33,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711488520] [2020-07-20 11:31:33,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:31:33,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:31:33,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:31:33,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:31:33,717 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 4 states. [2020-07-20 11:31:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:31:34,053 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-07-20 11:31:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:31:34,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-20 11:31:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:31:34,058 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:31:34,059 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 11:31:34,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:31:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 11:31:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-07-20 11:31:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:31:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-07-20 11:31:34,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 15 [2020-07-20 11:31:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:31:34,092 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-07-20 11:31:34,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:31:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-07-20 11:31:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:31:34,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:31:34,094 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:31:34,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:34,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:31:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:31:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1774425742, now seen corresponding path program 1 times [2020-07-20 11:31:34,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:31:34,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371693273] [2020-07-20 11:31:34,313 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 [2020-07-20 11:31:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:34,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:31:34,674 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:31:34,728 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:31:34,729 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:31:34,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:31:35,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:31:35 BoogieIcfgContainer [2020-07-20 11:31:35,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:31:35,024 INFO L168 Benchmark]: Toolchain (without parser) took 5551.67 ms. Allocated memory was 141.6 MB in the beginning and 226.5 MB in the end (delta: 84.9 MB). Free memory was 97.5 MB in the beginning and 75.1 MB in the end (delta: 22.4 MB). Peak memory consumption was 107.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,025 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 141.6 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1111.92 ms. Allocated memory was 141.6 MB in the beginning and 200.8 MB in the end (delta: 59.2 MB). Free memory was 97.0 MB in the beginning and 167.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,028 INFO L168 Benchmark]: Boogie Preprocessor took 156.08 ms. Allocated memory is still 200.8 MB. Free memory was 167.1 MB in the beginning and 164.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,029 INFO L168 Benchmark]: RCFGBuilder took 1151.55 ms. Allocated memory is still 200.8 MB. Free memory was 164.2 MB in the beginning and 110.5 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,030 INFO L168 Benchmark]: TraceAbstraction took 3117.83 ms. Allocated memory was 200.8 MB in the beginning and 226.5 MB in the end (delta: 25.7 MB). Free memory was 110.5 MB in the beginning and 75.1 MB in the end (delta: 35.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:31:35,035 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 141.6 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1111.92 ms. Allocated memory was 141.6 MB in the beginning and 200.8 MB in the end (delta: 59.2 MB). Free memory was 97.0 MB in the beginning and 167.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.08 ms. Allocated memory is still 200.8 MB. Free memory was 167.1 MB in the beginning and 164.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1151.55 ms. Allocated memory is still 200.8 MB. Free memory was 164.2 MB in the beginning and 110.5 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3117.83 ms. Allocated memory was 200.8 MB in the beginning and 226.5 MB in the end (delta: 25.7 MB). Free memory was 110.5 MB in the beginning and 75.1 MB in the end (delta: 35.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1027]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = ((void*)0) [L988] head->prev = ((void*)0) [L989] head->data = 0 [L991] SLL* x = head; [L992] int marked = 0; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, marked=0, x={-1:0}] [L995] COND TRUE __VERIFIER_nondet_int() || !marked [L998] x->next = malloc(sizeof(SLL)) [L999] EXPR x->next [L999] x->next->prev = x [L1000] EXPR x->next [L1000] x = x->next [L1001] x->next = ((void*)0) [L1003] COND TRUE __VERIFIER_nondet_int() [L1005] marked = 1 VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=1, x={-2:0}] [L1008] COND TRUE \read(marked) [L1009] x->data = 1 VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=1, x={-2:0}] [L995] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1014] x = head VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=1, x={-1:0}] [L1016] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=1, x={-1:0}] [L1017] marked = 0 VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-1:0}] [L1019] EXPR x->next [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] EXPR x->next [L1019] EXPR x->next->data [L1019] x->next != ((void*)0) && x->next->data == 0 VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next={-2:0}, x->next != ((void*)0) && x->next->data == 0=0, x->next->data=1] [L1019] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1024] EXPR x->next [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-1:0}, x->next={-2:0}, x->next != ((void*)0) && __VERIFIER_nondet_int()=1] [L1024] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1026] EXPR x->next [L1026] x = x->next [L1027] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-2:0}, x->data=1] [L1027] COND TRUE !(x->data != 1) [L1027] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, marked=0, x={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 156 SDslu, 63 SDs, 0 SdLazy, 50 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 3 MinimizatonAttempts, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 753 SizeOfPredicates, 2 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...