/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/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:11:03,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:11:03,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:11:03,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:11:03,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:11:03,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:11:03,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:11:03,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:11:03,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:11:03,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:11:03,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:11:03,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:11:03,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:11:03,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:11:03,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:11:03,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:11:03,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:11:03,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:11:03,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:11:03,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:11:03,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:11:03,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:11:03,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:11:03,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:11:03,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:11:03,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:11:03,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:11:03,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:11:03,610 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 21:11:03,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:11:03,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:11:03,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:11:03,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:11:03,625 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:11:03,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:11:03,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:11:03,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:11:03,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:11:03,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:11:03,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:11:03,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:11:03,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:11:03,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:11:03,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:11:03,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:11:03,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:11:03,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:11:03,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:11:03,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:11:03,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:11:03,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:11:03,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:11:03,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:11:03,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:11:03,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:11:03,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:03,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:11:03,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:11:03,630 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 21:11:03,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:11:03,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:11:03,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:11:03,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:11:03,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:11:03,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 21:11:03,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e7077f4/43f3db01bf68422eb5e3e88bb18d6695/FLAG4822afcfa [2020-07-20 21:11:04,452 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:11:04,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 21:11:04,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e7077f4/43f3db01bf68422eb5e3e88bb18d6695/FLAG4822afcfa [2020-07-20 21:11:04,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e7077f4/43f3db01bf68422eb5e3e88bb18d6695 [2020-07-20 21:11:04,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:11:04,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:11:04,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:11:04,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:11:04,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:11:04,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:11:04" (1/1) ... [2020-07-20 21:11:04,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9188d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:04, skipping insertion in model container [2020-07-20 21:11:04,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:11:04" (1/1) ... [2020-07-20 21:11:04,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:11:04,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:11:05,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:11:05,045 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:11:05,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:11:05,075 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:11:05,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05 WrapperNode [2020-07-20 21:11:05,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:11:05,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:11:05,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:11:05,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:11:05,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (1/1) ... [2020-07-20 21:11:05,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:11:05,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:11:05,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:11:05,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:11:05,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (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 21:11:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:11:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:11:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-20 21:11:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:11:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:11:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:11:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-20 21:11:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:11:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:11:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:11:05,401 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:11:05,401 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:11:05,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:11:05 BoogieIcfgContainer [2020-07-20 21:11:05,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:11:05,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:11:05,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:11:05,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:11:05,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:11:04" (1/3) ... [2020-07-20 21:11:05,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4357b531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:11:05, skipping insertion in model container [2020-07-20 21:11:05,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:11:05" (2/3) ... [2020-07-20 21:11:05,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4357b531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:11:05, skipping insertion in model container [2020-07-20 21:11:05,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:11:05" (3/3) ... [2020-07-20 21:11:05,413 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-20 21:11:05,422 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:11:05,429 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:11:05,443 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:11:05,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:11:05,466 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:11:05,466 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:11:05,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:11:05,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:11:05,466 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:11:05,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:11:05,467 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:11:05,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 21:11:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 21:11:05,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:05,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:05,492 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-07-20 21:11:05,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:05,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877014237] [2020-07-20 21:11:05,504 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 21:11:05,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:11:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:05,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 21:11:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:05,723 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 21:11:05,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:11:05,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877014237] [2020-07-20 21:11:05,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:11:05,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 21:11:05,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704379527] [2020-07-20 21:11:05,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 21:11:05,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 21:11:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 21:11:05,752 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-07-20 21:11:05,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:05,882 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 21:11:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 21:11:05,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 21:11:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:05,894 INFO L225 Difference]: With dead ends: 34 [2020-07-20 21:11:05,895 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 21:11:05,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 21:11:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 21:11:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 21:11:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 21:11:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-07-20 21:11:05,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-07-20 21:11:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:05,944 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-07-20 21:11:05,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 21:11:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-07-20 21:11:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:11:05,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:11:05,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:11:06,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:06,160 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:11:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:11:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-07-20 21:11:06,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:11:06,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140070536] [2020-07-20 21:11:06,161 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 21:11:06,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:11:06,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:11:06,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 21:11:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:11:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 21:11:06,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 21:11:06,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:11:06,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 21:11:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 21:11:06,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140070536] [2020-07-20 21:11:06,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 21:11:06,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2020-07-20 21:11:06,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585212743] [2020-07-20 21:11:06,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 21:11:06,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:11:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 21:11:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-20 21:11:06,820 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 15 states. [2020-07-20 21:11:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:11:06,989 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-20 21:11:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 21:11:06,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-07-20 21:11:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:11:06,990 INFO L225 Difference]: With dead ends: 20 [2020-07-20 21:11:06,990 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:11:06,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-07-20 21:11:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:11:06,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:11:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:11:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:11:06,993 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 21:11:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:11:06,994 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:11:06,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 21:11:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:11:06,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:11:07,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:11:07,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:11:07,296 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:11:07,296 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:11:07,296 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:11:07,297 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:11:07,297 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:11:07,297 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:11:07,297 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-20 21:11:07,297 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-20 21:11:07,298 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-20 21:11:07,298 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-07-20 21:11:07,298 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 21:11:07,298 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-20 21:11:07,298 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-20 21:11:07,298 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-07-20 21:11:07,299 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-20 21:11:07,299 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-07-20 21:11:07,299 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-07-20 21:11:07,299 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-20 21:11:07,299 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-07-20 21:11:07,300 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-20 21:11:07,300 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-07-20 21:11:07,300 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 21:11:07,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:11:07 BoogieIcfgContainer [2020-07-20 21:11:07,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:11:07,309 INFO L168 Benchmark]: Toolchain (without parser) took 2455.78 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 102.4 MB in the beginning and 149.4 MB in the end (delta: -47.0 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,310 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,311 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.35 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,312 INFO L168 Benchmark]: Boogie Preprocessor took 27.37 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,313 INFO L168 Benchmark]: RCFGBuilder took 300.88 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 170.2 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,314 INFO L168 Benchmark]: TraceAbstraction took 1900.02 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.5 MB in the beginning and 149.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:11:07,319 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.35 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.37 ms. Allocated memory is still 138.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.88 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 170.2 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1900.02 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 169.5 MB in the beginning and 149.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 20 SDslu, 113 SDs, 0 SdLazy, 146 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 38 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 9 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 17/24 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 correct! Received shutdown request...