/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/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:11:25,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:11:25,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:11:25,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:11:25,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:11:25,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:11:25,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:11:25,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:11:25,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:11:25,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:11:25,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:11:25,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:11:25,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:11:25,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:11:25,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:11:25,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:11:25,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:11:25,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:11:25,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:11:25,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:11:25,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:11:25,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:11:25,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:11:25,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:11:25,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:11:25,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:11:25,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:11:25,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:11:25,726 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 13:11:25,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:11:25,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:11:25,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:11:25,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:11:25,766 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:11:25,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:11:25,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:11:25,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:11:25,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:11:25,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:11:25,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:11:25,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:11:25,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:11:25,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:11:25,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:11:25,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:11:25,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:11:25,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:11:25,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:11:25,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:11:25,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:11:25,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:11:25,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:11:25,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:11:25,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:11:25,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:11:25,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:25,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:11:25,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:11:25,776 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 13:11:26,081 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:11:26,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:11:26,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:11:26,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:11:26,100 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:11:26,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 13:11:26,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd098ef/180fb3c043c7443489928fa6f501633c/FLAG591008567 [2020-07-20 13:11:26,666 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:11:26,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-20 13:11:26,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd098ef/180fb3c043c7443489928fa6f501633c/FLAG591008567 [2020-07-20 13:11:27,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abd098ef/180fb3c043c7443489928fa6f501633c [2020-07-20 13:11:27,010 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:11:27,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:11:27,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:11:27,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:11:27,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:11:27,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52590782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 13:11:27,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:11:27,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:11:27,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:11:27,214 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:11:27,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:11:27,252 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:11:27,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27 WrapperNode [2020-07-20 13:11:27,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:11:27,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:11:27,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:11:27,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:11:27,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (1/1) ... [2020-07-20 13:11:27,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:11:27,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:11:27,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:11:27,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:11:27,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (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 13:11:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:11:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:11:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-20 13:11:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:11:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:11:27,609 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:11:27,609 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:11:27,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:27 BoogieIcfgContainer [2020-07-20 13:11:27,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:11:27,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:11:27,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:11:27,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:11:27,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:11:27" (1/3) ... [2020-07-20 13:11:27,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52758409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 13:11:27,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:11:27" (2/3) ... [2020-07-20 13:11:27,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52758409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:11:27, skipping insertion in model container [2020-07-20 13:11:27,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:11:27" (3/3) ... [2020-07-20 13:11:27,623 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-20 13:11:27,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:11:27,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:11:27,702 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:11:27,734 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:11:27,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:11:27,735 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:11:27,735 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:11:27,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:11:27,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:11:27,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:11:27,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:11:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 13:11:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:11:27,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:27,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:11:27,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-07-20 13:11:27,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:27,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919749463] [2020-07-20 13:11:27,770 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 13:11:27,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:11:27,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:27,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 13:11:27,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:27,979 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 13:11:27,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:11:27,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919749463] [2020-07-20 13:11:27,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:11:27,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 13:11:27,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691437851] [2020-07-20 13:11:27,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 13:11:27,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 13:11:28,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:11:28,002 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-07-20 13:11:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:28,139 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-20 13:11:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:11:28,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 13:11:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:28,153 INFO L225 Difference]: With dead ends: 34 [2020-07-20 13:11:28,153 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 13:11:28,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:11:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 13:11:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 13:11:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 13:11:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-07-20 13:11:28,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-07-20 13:11:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:28,206 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-07-20 13:11:28,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 13:11:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-07-20 13:11:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:11:28,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:11:28,210 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 13:11:28,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:28,426 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:11:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:11:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-07-20 13:11:28,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:11:28,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809174534] [2020-07-20 13:11:28,429 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 13:11:28,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:11:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:11:28,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 13:11:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:11:28,628 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 13:11:28,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:11:28,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:28,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 13:11:29,083 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 13:11:29,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809174534] [2020-07-20 13:11:29,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:11:29,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2020-07-20 13:11:29,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107229865] [2020-07-20 13:11:29,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:11:29,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:11:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:11:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:11:29,089 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 15 states. [2020-07-20 13:11:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:11:29,264 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-07-20 13:11:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:11:29,265 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-07-20 13:11:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:11:29,266 INFO L225 Difference]: With dead ends: 20 [2020-07-20 13:11:29,266 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 13:11:29,267 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 13:11:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 13:11:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 13:11:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 13:11:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 13:11:29,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 13:11:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:11:29,269 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 13:11:29,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:11:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 13:11:29,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 13:11:29,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:11:29,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 13:11:29,573 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 13:11:29,574 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:29,574 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 13:11:29,574 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 13:11:29,574 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 13:11:29,574 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 13:11:29,575 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-07-20 13:11:29,575 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-20 13:11:29,575 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-20 13:11:29,575 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-07-20 13:11:29,575 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 13:11:29,576 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-20 13:11:29,576 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-20 13:11:29,576 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-07-20 13:11:29,576 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 13:11:29,576 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-07-20 13:11:29,577 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-07-20 13:11:29,577 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-20 13:11:29,577 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-07-20 13:11:29,577 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 13:11:29,577 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-07-20 13:11:29,577 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 13:11:29,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:11:29 BoogieIcfgContainer [2020-07-20 13:11:29,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:11:29,587 INFO L168 Benchmark]: Toolchain (without parser) took 2574.02 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 104.0 MB in the beginning and 147.4 MB in the end (delta: -43.4 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,588 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,589 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.56 ms. Allocated memory is still 138.9 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,590 INFO L168 Benchmark]: Boogie Preprocessor took 31.38 ms. Allocated memory is still 138.9 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,591 INFO L168 Benchmark]: RCFGBuilder took 325.91 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 171.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,592 INFO L168 Benchmark]: TraceAbstraction took 1969.17 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.1 MB in the beginning and 147.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:11:29,597 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.56 ms. Allocated memory is still 138.9 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.38 ms. Allocated memory is still 138.9 MB. Free memory was 94.5 MB in the beginning and 93.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.91 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 171.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1969.17 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.1 MB in the beginning and 147.4 MB in the end (delta: 23.7 MB). Peak memory consumption was 56.2 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, 37 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 9 NumberOfNonLiveVariables, 93 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...