/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 DAGSIZE --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/recursive/EvenOdd03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:09:24,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:09:24,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:09:24,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:09:24,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:09:24,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:09:24,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:09:24,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:09:24,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:09:24,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:09:24,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:09:24,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:09:24,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:09:24,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:09:24,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:09:24,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:09:24,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:09:24,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:09:24,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:09:24,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:09:24,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:09:24,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:09:24,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:09:24,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:09:24,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 21:09:24,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 21:09:24,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 21:09:24,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 21:09:24,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 21:09:24,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 21:09:24,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:09:24,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:09:24,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:09:24,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:09:24,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:09:24,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:09:24,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:09:24,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:09:24,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:09:24,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:09:24,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:09:24,477 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 21:09:24,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:09:24,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:09:24,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:09:24,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:09:24,494 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:09:24,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:09:24,494 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:09:24,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:09:24,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:09:24,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:09:24,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:09:24,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:09:24,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:09:24,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:09:24,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:09:24,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:09:24,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:09:24,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:09:24,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:09:24,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:09:24,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:09:24,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:24,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:09:24,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:09:24,502 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 -> DAGSIZE 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 21:09:24,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:09:24,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:09:24,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:09:24,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:09:24,821 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:09:24,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd03.c [2020-07-20 21:09:24,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b25132cb/d0fab6417c8745718255fe78aa9dee68/FLAG018de355f [2020-07-20 21:09:25,417 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:09:25,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c [2020-07-20 21:09:25,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b25132cb/d0fab6417c8745718255fe78aa9dee68/FLAG018de355f [2020-07-20 21:09:25,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b25132cb/d0fab6417c8745718255fe78aa9dee68 [2020-07-20 21:09:25,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:09:25,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:09:25,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:09:25,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:09:25,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:09:25,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:25" (1/1) ... [2020-07-20 21:09:25,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3932551c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:25, skipping insertion in model container [2020-07-20 21:09:25,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:09:25" (1/1) ... [2020-07-20 21:09:25,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:09:25,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:09:25,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:09:25,983 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:09:26,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:09:26,019 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:09:26,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26 WrapperNode [2020-07-20 21:09:26,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:09:26,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:09:26,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:09:26,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:09:26,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (1/1) ... [2020-07-20 21:09:26,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:09:26,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:09:26,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:09:26,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:09:26,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (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 21:09:26,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:09:26,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:09:26,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-20 21:09:26,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-20 21:09:26,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:09:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:09:26,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:09:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-20 21:09:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-20 21:09:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:09:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:09:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:09:26,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:09:26,475 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:09:26,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:26 BoogieIcfgContainer [2020-07-20 21:09:26,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:09:26,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:09:26,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:09:26,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:09:26,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:09:25" (1/3) ... [2020-07-20 21:09:26,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f65deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:26, skipping insertion in model container [2020-07-20 21:09:26,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:09:26" (2/3) ... [2020-07-20 21:09:26,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f65deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:09:26, skipping insertion in model container [2020-07-20 21:09:26,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:09:26" (3/3) ... [2020-07-20 21:09:26,490 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2020-07-20 21:09:26,503 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:09:26,512 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:09:26,540 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:09:26,567 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:09:26,567 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:09:26,567 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:09:26,567 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:09:26,568 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:09:26,568 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:09:26,568 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:09:26,568 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:09:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 21:09:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 21:09:26,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:09:26,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:09:26,599 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:09:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:09:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash -241846627, now seen corresponding path program 1 times [2020-07-20 21:09:26,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:09:26,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561067057] [2020-07-20 21:09:26,613 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 21:09:26,688 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:09:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:09:26,690 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:09:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:09:26,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:09:26,718 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:09:26,719 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:09:26,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:09:26,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:09:26 BoogieIcfgContainer [2020-07-20 21:09:26,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:09:26,950 INFO L168 Benchmark]: Toolchain (without parser) took 1176.70 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 100.5 MB in the beginning and 151.8 MB in the end (delta: -51.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,951 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.97 ms. Allocated memory is still 143.1 MB. Free memory was 100.1 MB in the beginning and 90.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,953 INFO L168 Benchmark]: Boogie Preprocessor took 26.72 ms. Allocated memory is still 143.1 MB. Free memory was 90.5 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,954 INFO L168 Benchmark]: RCFGBuilder took 433.17 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.2 MB in the beginning and 167.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,955 INFO L168 Benchmark]: TraceAbstraction took 465.17 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 151.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:09:26,959 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.97 ms. Allocated memory is still 143.1 MB. Free memory was 100.1 MB in the beginning and 90.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.72 ms. Allocated memory is still 143.1 MB. Free memory was 90.5 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.17 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 89.2 MB in the beginning and 167.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 465.17 ms. Allocated memory is still 200.8 MB. Free memory was 166.6 MB in the beginning and 151.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 47]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int n = __VERIFIER_nondet_int(); [L39] COND FALSE !(n < 0) VAL [n=0] [L42] CALL, EXPR isEven(n) VAL [\old(n)=0] [L27] COND TRUE n == 0 [L28] return 1; VAL [\old(n)=0, \result=1, n=0] [L42] RET, EXPR isEven(n) VAL [isEven(n)=1, n=0] [L42] int result = isEven(n); [L43] int mod = n % 2; VAL [mod=0, n=0, result=1] [L44] COND FALSE !(result < 0 || result == mod) VAL [mod=0, n=0, result=1] [L47] __VERIFIER_error() VAL [mod=0, n=0, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...