/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:55:56,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:55:56,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:55:56,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:55:56,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:55:56,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:55:56,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:55:56,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:55:56,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:55:56,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:55:56,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:55:56,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:55:56,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:55:56,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:55:56,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:55:56,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:55:56,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:55:56,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:55:56,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:55:56,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:55:56,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:55:56,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:55:56,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:55:56,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:55:56,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:55:56,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:55:56,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:55:56,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:55:56,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:55:56,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:55:56,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:55:56,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:55:56,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:55:56,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:55:56,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:55:56,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:55:56,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:55:56,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:55:56,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:55:56,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:55:56,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:55:56,400 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 13:55:56,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:55:56,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:55:56,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:55:56,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:55:56,417 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:55:56,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:55:56,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:55:56,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:55:56,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:55:56,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:55:56,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:55:56,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:55:56,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:55:56,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:55:56,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:55:56,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:55:56,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:55:56,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:55:56,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:55:56,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:55:56,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:55:56,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:55:56,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:55:56,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:55:56,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:55:56,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:55:56,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:56,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:55:56,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:55:56,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:55:56,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:55:56,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:55:56,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:55:56,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:55:56,785 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:55:56,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 13:55:56,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea30d9ef/25ccd156b7324db8906a36753bc411cd/FLAG52aaed5a1 [2020-07-20 13:55:57,418 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:55:57,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-07-20 13:55:57,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea30d9ef/25ccd156b7324db8906a36753bc411cd/FLAG52aaed5a1 [2020-07-20 13:55:57,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea30d9ef/25ccd156b7324db8906a36753bc411cd [2020-07-20 13:55:57,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:55:57,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:55:57,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:57,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:55:57,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:55:57,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:57" (1/1) ... [2020-07-20 13:55:57,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bc4381c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:57, skipping insertion in model container [2020-07-20 13:55:57,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:55:57" (1/1) ... [2020-07-20 13:55:57,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:55:57,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:55:58,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:58,242 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:55:58,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:55:58,401 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:55:58,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58 WrapperNode [2020-07-20 13:55:58,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:55:58,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:55:58,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:55:58,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:55:58,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (1/1) ... [2020-07-20 13:55:58,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:55:58,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:55:58,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:55:58,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:55:58,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (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 13:55:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:55:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:55:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:55:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:55:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:55:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:55:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:55:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:55:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:55:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:55:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:55:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:55:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:55:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:55:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:55:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:55:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:55:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:55:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:55:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:55:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:55:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:55:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:55:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:55:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:55:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:55:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:55:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:55:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:55:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:55:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:55:58,588 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:55:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:55:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:55:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:55:58,589 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:55:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:55:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 13:55:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:55:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:55:58,590 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:55:58,591 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:55:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:55:58,592 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:55:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:55:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:55:58,593 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:55:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:55:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:55:58,594 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:55:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:55:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:55:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:55:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:55:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:55:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:55:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:55:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:55:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:55:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:55:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:55:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:55:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:55:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:55:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:55:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:55:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:55:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:55:59,174 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:55:59,175 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-20 13:55:59,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:59 BoogieIcfgContainer [2020-07-20 13:55:59,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:55:59,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:55:59,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:55:59,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:55:59,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:55:57" (1/3) ... [2020-07-20 13:55:59,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329990fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:59, skipping insertion in model container [2020-07-20 13:55:59,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:55:58" (2/3) ... [2020-07-20 13:55:59,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329990fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:55:59, skipping insertion in model container [2020-07-20 13:55:59,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:55:59" (3/3) ... [2020-07-20 13:55:59,192 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-07-20 13:55:59,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:55:59,216 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 13:55:59,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 13:55:59,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:55:59,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:55:59,261 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:55:59,261 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:55:59,262 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:55:59,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:55:59,262 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:55:59,262 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:55:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 13:55:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 13:55:59,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:59,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:55:59,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:55:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:55:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-07-20 13:55:59,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:55:59,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826147050] [2020-07-20 13:55:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:55:59,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:55:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:55:59,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:55:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:55:59,621 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 13:55:59,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:55:59,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826147050] [2020-07-20 13:55:59,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:55:59,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:55:59,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766425323] [2020-07-20 13:55:59,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:55:59,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:55:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:55:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:55:59,648 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-07-20 13:55:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:55:59,758 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2020-07-20 13:55:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:55:59,760 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-20 13:55:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:55:59,772 INFO L225 Difference]: With dead ends: 67 [2020-07-20 13:55:59,772 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:55:59,776 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 [2020-07-20 13:55:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:55:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-07-20 13:55:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:55:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 13:55:59,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2020-07-20 13:55:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:55:59,821 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 13:55:59,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:55:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 13:55:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:55:59,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:55:59,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:56:00,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:00,038 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:56:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-07-20 13:56:00,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:00,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327493811] [2020-07-20 13:56:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:00,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:56:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:00,196 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 13:56:00,197 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,201 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,202 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 13:56:00,257 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 [2020-07-20 13:56:00,264 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,269 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,270 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 13:56:00,279 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 13:56:00,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:00,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327493811] [2020-07-20 13:56:00,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:00,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:56:00,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81246629] [2020-07-20 13:56:00,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:56:00,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:56:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:56:00,286 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 13:56:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:00,421 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 13:56:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:56:00,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:56:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:00,426 INFO L225 Difference]: With dead ends: 51 [2020-07-20 13:56:00,426 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 13:56:00,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:56:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 13:56:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-07-20 13:56:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 13:56:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 13:56:00,446 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-07-20 13:56:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:00,446 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 13:56:00,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:56:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 13:56:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:56:00,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:00,449 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:56:00,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:00,664 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:56:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-07-20 13:56:00,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:00,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276502892] [2020-07-20 13:56:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:00,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:00,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 13:56:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:00,875 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 [2020-07-20 13:56:00,876 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,888 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,901 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 13:56:00,902 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,921 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:00,922 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:00,922 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-07-20 13:56:01,003 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,004 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-07-20 13:56:01,006 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,063 INFO L624 ElimStorePlain]: treesize reduction 14, result has 81.1 percent of original size [2020-07-20 13:56:01,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:01,078 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 13:56:01,079 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,099 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,106 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 0 case distinctions, treesize of input 25 treesize of output 13 [2020-07-20 13:56:01,107 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,119 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,121 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,122 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-07-20 13:56:01,205 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,206 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-07-20 13:56:01,207 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,262 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,267 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_26|, |v_#memory_int_27|], 4=[|v_#memory_int_29|]} [2020-07-20 13:56:01,279 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,308 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,315 INFO L544 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,338 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 13:56:01,375 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-07-20 13:56:01,376 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-07-20 13:56:01,377 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,407 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,416 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,416 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2020-07-20 13:56:01,532 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2020-07-20 13:56:01,533 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,541 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,542 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:01,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-07-20 13:56:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:56:01,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:56:01,596 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_27|], 3=[|v_#memory_int_26|]} [2020-07-20 13:56:01,600 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,620 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,623 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,636 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,638 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,638 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:63, output treesize:55 [2020-07-20 13:56:01,690 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_25|], 6=[|v_#memory_int_31|]} [2020-07-20 13:56:01,698 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,726 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,730 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,749 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:01,751 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 1 xjuncts. [2020-07-20 13:56:01,752 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:96, output treesize:102 [2020-07-20 13:56:03,893 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:03,894 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 22 treesize of output 26 [2020-07-20 13:56:03,895 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,899 INFO L624 ElimStorePlain]: treesize reduction 108, result has 0.9 percent of original size [2020-07-20 13:56:03,902 INFO L512 ElimStorePlain]: Eliminatee |v_#memory_int_24| vanished before elimination [2020-07-20 13:56:03,903 INFO L544 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:03,903 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:121, output treesize:1 [2020-07-20 13:56:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:56:03,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276502892] [2020-07-20 13:56:03,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:56:03,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 13:56:03,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411997893] [2020-07-20 13:56:03,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:56:03,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:56:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2020-07-20 13:56:03,919 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 11 states. [2020-07-20 13:56:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:10,647 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-07-20 13:56:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:56:10,648 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-07-20 13:56:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:10,649 INFO L225 Difference]: With dead ends: 64 [2020-07-20 13:56:10,650 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 13:56:10,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=78, Invalid=193, Unknown=1, NotChecked=0, Total=272 [2020-07-20 13:56:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 13:56:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 23. [2020-07-20 13:56:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 13:56:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 13:56:10,659 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-07-20 13:56:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:10,659 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 13:56:10,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:56:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 13:56:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:56:10,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:10,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:56:10,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:10,869 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:56:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-07-20 13:56:10,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:10,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638358347] [2020-07-20 13:56:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:10,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:56:10,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:56:10,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:56:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:56:11,012 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-07-20 13:56:11,012 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:11,015 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:11,015 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:11,016 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-07-20 13:56:11,033 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 [2020-07-20 13:56:11,033 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 13:56:11,037 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 13:56:11,038 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 13:56:11,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 13:56:11,053 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 13:56:11,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:56:11,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638358347] [2020-07-20 13:56:11,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:56:11,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:56:11,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188506503] [2020-07-20 13:56:11,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:56:11,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:56:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:56:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:56:11,056 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-07-20 13:56:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:56:11,175 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-07-20 13:56:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:56:11,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:56:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:56:11,179 INFO L225 Difference]: With dead ends: 55 [2020-07-20 13:56:11,179 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 13:56:11,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:56:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 13:56:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-07-20 13:56:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 13:56:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 13:56:11,197 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2020-07-20 13:56:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:56:11,197 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 13:56:11,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:56:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 13:56:11,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:56:11,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:56:11,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:56:11,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:11,415 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:56:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:56:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-07-20 13:56:11,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:56:11,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214929295] [2020-07-20 13:56:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:11,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:56:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:56:11,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:56:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:56:11,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:56:11,536 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:56:11,536 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:56:11,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:56:11,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:56:11 BoogieIcfgContainer [2020-07-20 13:56:11,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:56:11,790 INFO L168 Benchmark]: Toolchain (without parser) took 14080.36 ms. Allocated memory was 138.4 MB in the beginning and 248.0 MB in the end (delta: 109.6 MB). Free memory was 102.1 MB in the beginning and 157.7 MB in the end (delta: -55.6 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,791 INFO L168 Benchmark]: CDTParser took 0.63 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 689.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.7 MB in the beginning and 170.0 MB in the end (delta: -68.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,793 INFO L168 Benchmark]: Boogie Preprocessor took 85.15 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 167.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,793 INFO L168 Benchmark]: RCFGBuilder took 691.33 ms. Allocated memory is still 202.9 MB. Free memory was 167.2 MB in the beginning and 122.2 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,794 INFO L168 Benchmark]: TraceAbstraction took 12604.23 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 121.6 MB in the beginning and 157.7 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:56:11,798 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.63 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 689.80 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.7 MB in the beginning and 170.0 MB in the end (delta: -68.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.15 ms. Allocated memory is still 202.9 MB. Free memory was 170.0 MB in the beginning and 167.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 691.33 ms. Allocated memory is still 202.9 MB. Free memory was 167.2 MB in the beginning and 122.2 MB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12604.23 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 121.6 MB in the beginning and 157.7 MB in the end (delta: -36.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 170 SDslu, 286 SDs, 0 SdLazy, 215 SolverSat, 53 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 4 MinimizatonAttempts, 78 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 79 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 72 ConstructedInterpolants, 9 QuantifiedInterpolants, 13501 SizeOfPredicates, 25 NumberOfNonLiveVariables, 231 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 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...