/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:05:34,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:05:34,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:05:34,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:05:34,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:05:34,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:05:34,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:05:34,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:05:34,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:05:34,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:05:34,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:05:34,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:05:34,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:05:34,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:05:34,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:05:34,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:05:34,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:05:34,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:05:34,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:05:34,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:05:34,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:05:34,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:05:34,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:05:34,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:05:34,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:05:34,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:05:34,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:05:34,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:05:34,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:05:34,672 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:05:34,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:05:34,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:05:34,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:05:34,675 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:05:34,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:05:34,675 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:05:34,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:05:34,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:05:34,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:05:34,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:05:34,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:05:34,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:05:34,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:05:34,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:05:34,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:05:34,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:05:34,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:05:34,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:05:34,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:05:34,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:05:34,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:05:34,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:05:34,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:05:34,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:05:35,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:05:35,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:05:35,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:05:35,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:05:35,205 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:05:35,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-09-04 13:05:35,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3db0b2ed/d797eb29b2a74815815905de4fb1fe08/FLAG5a440a808 [2020-09-04 13:05:35,891 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:05:35,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-09-04 13:05:35,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3db0b2ed/d797eb29b2a74815815905de4fb1fe08/FLAG5a440a808 [2020-09-04 13:05:36,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3db0b2ed/d797eb29b2a74815815905de4fb1fe08 [2020-09-04 13:05:36,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:05:36,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:05:36,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:36,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:05:36,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:05:36,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4f649f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36, skipping insertion in model container [2020-09-04 13:05:36,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:05:36,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:05:36,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:36,542 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:05:36,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:36,575 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:05:36,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36 WrapperNode [2020-09-04 13:05:36,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:36,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:05:36,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:05:36,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:05:36,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:05:36,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:05:36,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:05:36,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:05:36,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:05:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:05:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-09-04 13:05:36,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:05:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:05:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:05:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-09-04 13:05:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:05:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:05:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:05:36,988 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:05:36,989 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:05:36,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:36 BoogieIcfgContainer [2020-09-04 13:05:36,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:05:36,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:05:36,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:05:37,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:05:37,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:05:36" (1/3) ... [2020-09-04 13:05:37,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2af4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:37, skipping insertion in model container [2020-09-04 13:05:37,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (2/3) ... [2020-09-04 13:05:37,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2af4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:37, skipping insertion in model container [2020-09-04 13:05:37,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:36" (3/3) ... [2020-09-04 13:05:37,006 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-09-04 13:05:37,020 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:05:37,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:05:37,086 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:05:37,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:05:37,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:05:37,141 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:05:37,141 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:05:37,141 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:05:37,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:05:37,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:05:37,142 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:05:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-04 13:05:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:05:37,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:37,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:05:37,179 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:37,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-09-04 13:05:37,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:37,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309431766] [2020-09-04 13:05:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:05:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:05:37,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309431766] [2020-09-04 13:05:37,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:05:37,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:05:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113029553] [2020-09-04 13:05:37,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:05:37,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:05:37,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:05:37,643 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-09-04 13:05:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:37,827 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-09-04 13:05:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:05:37,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-09-04 13:05:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:37,844 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:05:37,844 INFO L226 Difference]: Without dead ends: 20 [2020-09-04 13:05:37,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:05:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-04 13:05:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-04 13:05:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 13:05:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-09-04 13:05:37,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-09-04 13:05:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:37,908 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-09-04 13:05:37,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:05:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-09-04 13:05:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:05:37,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:37,911 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] [2020-09-04 13:05:37,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:05:37,912 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-09-04 13:05:37,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:37,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699707393] [2020-09-04 13:05:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:05:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:05:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 13:05:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:05:38,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699707393] [2020-09-04 13:05:38,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705007930] [2020-09-04 13:05:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:05:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:05:38,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:38,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-04 13:05:38,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36398407] [2020-09-04 13:05:38,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:05:38,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:05:38,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:05:38,465 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 12 states. [2020-09-04 13:05:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:38,724 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-09-04 13:05:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:05:38,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-09-04 13:05:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:38,725 INFO L225 Difference]: With dead ends: 20 [2020-09-04 13:05:38,725 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:05:38,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:05:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:05:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:05:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:05:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:05:38,730 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-09-04 13:05:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:38,730 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:05:38,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:05:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:05:38,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:05:38,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:05:38,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:05:39,026 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:05:39,026 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:05:39,026 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:05:39,026 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:05:39,027 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:05:39,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:05:39,027 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-09-04 13:05:39,027 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-09-04 13:05:39,028 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-09-04 13:05:39,028 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-09-04 13:05:39,028 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-09-04 13:05:39,028 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-09-04 13:05:39,028 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-04 13:05:39,028 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-09-04 13:05:39,029 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret0| 101)) [2020-09-04 13:05:39,029 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-09-04 13:05:39,029 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-09-04 13:05:39,029 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-09-04 13:05:39,029 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-09-04 13:05:39,030 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|)) [2020-09-04 13:05:39,030 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-09-04 13:05:39,030 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-04 13:05:39,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:05:39 BoogieIcfgContainer [2020-09-04 13:05:39,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:05:39,042 INFO L168 Benchmark]: Toolchain (without parser) took 2807.96 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 104.2 MB in the beginning and 180.3 MB in the end (delta: -76.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:39,043 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:05:39,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.73 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:39,045 INFO L168 Benchmark]: Boogie Preprocessor took 33.45 ms. Allocated memory is still 140.5 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:39,047 INFO L168 Benchmark]: RCFGBuilder took 384.40 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 171.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:39,048 INFO L168 Benchmark]: TraceAbstraction took 2042.34 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 170.4 MB in the beginning and 180.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:39,052 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.73 ms. Allocated memory is still 140.5 MB. Free memory was 103.9 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.45 ms. Allocated memory is still 140.5 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.40 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 171.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2042.34 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 170.4 MB in the beginning and 180.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 22.1 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: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 20 SDslu, 110 SDs, 0 SdLazy, 130 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 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, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 5016 SizeOfPredicates, 5 NumberOfNonLiveVariables, 61 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 16/24 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...