/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:05:55,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:05:55,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:05:55,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:05:55,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:05:55,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:05:55,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:05:55,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:05:55,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:05:55,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:05:55,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:05:55,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:05:55,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:05:55,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:05:55,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:05:55,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:05:55,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:05:55,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:05:55,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:05:55,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:05:55,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:05:55,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:05:55,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:05:55,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:05:55,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:05:55,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:05:55,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:05:55,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:05:55,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:05:55,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:05:55,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:05:55,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:05:55,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:05:55,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:05:55,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:05:55,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:05:55,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:05:55,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:05:55,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:05:55,944 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:05:55,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:05:55,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:05:55,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:05:55,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:05:55,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:05:55,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:05:55,945 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:05:56,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:05:56,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:05:56,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:05:56,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:05:56,252 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:05:56,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-17 17:05:56,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbeaa4655/f9c81a6d3aac47e48dbfca145181ef7d/FLAGc0688082b [2020-07-17 17:05:56,767 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:05:56,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-07-17 17:05:56,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbeaa4655/f9c81a6d3aac47e48dbfca145181ef7d/FLAGc0688082b [2020-07-17 17:05:57,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbeaa4655/f9c81a6d3aac47e48dbfca145181ef7d [2020-07-17 17:05:57,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:05:57,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:05:57,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:57,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:05:57,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:05:57,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4931f6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57, skipping insertion in model container [2020-07-17 17:05:57,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:05:57,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:05:57,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:57,405 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:05:57,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:05:57,451 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:05:57,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57 WrapperNode [2020-07-17 17:05:57,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:05:57,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:05:57,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:05:57,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:05:57,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (1/1) ... [2020-07-17 17:05:57,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:05:57,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:05:57,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:05:57,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:05:57,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (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 [2020-07-17 17:05:57,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:05:57,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:05:57,704 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-07-17 17:05:57,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:05:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:05:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:05:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-07-17 17:05:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:05:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:05:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:05:57,876 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:05:57,876 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:05:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:57 BoogieIcfgContainer [2020-07-17 17:05:57,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:05:57,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:05:57,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:05:57,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:05:57,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:05:57" (1/3) ... [2020-07-17 17:05:57,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e4f758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:57, skipping insertion in model container [2020-07-17 17:05:57,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:05:57" (2/3) ... [2020-07-17 17:05:57,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e4f758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:57, skipping insertion in model container [2020-07-17 17:05:57,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:57" (3/3) ... [2020-07-17 17:05:57,888 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-07-17 17:05:57,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:05:57,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:05:57,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:05:57,940 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:05:57,940 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:05:57,940 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:05:57,940 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:05:57,941 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:05:57,941 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:05:57,941 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:05:57,941 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:05:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-17 17:05:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:05:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:57,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:57,968 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash 346555185, now seen corresponding path program 1 times [2020-07-17 17:05:57,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:57,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965721176] [2020-07-17 17:05:57,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:58,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965721176] [2020-07-17 17:05:58,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:58,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 17:05:58,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767825187] [2020-07-17 17:05:58,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:05:58,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:05:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:05:58,362 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 7 states. [2020-07-17 17:05:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:58,607 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-17 17:05:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:05:58,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-17 17:05:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:58,620 INFO L225 Difference]: With dead ends: 46 [2020-07-17 17:05:58,620 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 17:05:58,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:05:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 17:05:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 17:05:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 17:05:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-17 17:05:58,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2020-07-17 17:05:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:58,672 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-17 17:05:58,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:05:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-17 17:05:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 17:05:58,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:58,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:05:58,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:05:58,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1167280018, now seen corresponding path program 1 times [2020-07-17 17:05:58,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:58,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009777797] [2020-07-17 17:05:58,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 17:05:59,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009777797] [2020-07-17 17:05:59,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:05:59,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:05:59,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255540772] [2020-07-17 17:05:59,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:05:59,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:59,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:05:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:05:59,059 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 12 states. [2020-07-17 17:05:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:59,331 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-17 17:05:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:05:59,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-07-17 17:05:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:59,333 INFO L225 Difference]: With dead ends: 28 [2020-07-17 17:05:59,333 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 17:05:59,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:05:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 17:05:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 17:05:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 17:05:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 17:05:59,336 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-17 17:05:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:59,336 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 17:05:59,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:05:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 17:05:59,337 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 17:05:59,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:05:59,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 17:05:59,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,675 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,676 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:05:59,676 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) the Hoare annotation is: false [2020-07-17 17:05:59,676 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-07-17 17:05:59,676 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-07-17 17:05:59,676 INFO L271 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-07-17 17:05:59,677 INFO L264 CegarLoopResult]: At program point L27(lines 27 31) the Hoare annotation is: (let ((.cse0 (<= 91 main_~result~0))) (or (and (<= main_~result~0 91) .cse0) (let ((.cse1 (+ main_~result~0 10))) (and (<= main_~x~0 .cse1) .cse0 (<= .cse1 main_~x~0))))) [2020-07-17 17:05:59,677 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-17 17:05:59,677 INFO L271 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-07-17 17:05:59,677 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (let ((.cse0 (<= 91 |main_#t~ret3|))) (or (and (<= |main_#t~ret3| 91) .cse0) (let ((.cse1 (+ |main_#t~ret3| 10))) (and (<= main_~x~0 .cse1) (<= .cse1 main_~x~0) .cse0)))) [2020-07-17 17:05:59,678 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 24 32) the Hoare annotation is: true [2020-07-17 17:05:59,678 INFO L271 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-07-17 17:05:59,678 INFO L264 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (let ((.cse0 (<= 91 |main_#t~ret3|))) (or (and (<= |main_#t~ret3| 91) .cse0) (let ((.cse1 (+ |main_#t~ret3| 10))) (and (<= main_~x~0 .cse1) (<= .cse1 main_~x~0) .cse0)))) [2020-07-17 17:05:59,678 INFO L264 CegarLoopResult]: At program point L26-3(line 26) the Hoare annotation is: (let ((.cse2 (<= 91 |main_#t~ret3|))) (or (let ((.cse0 (+ |main_#t~ret3| 10)) (.cse1 (+ main_~result~0 10))) (and (<= main_~x~0 .cse0) (<= main_~x~0 .cse1) (<= .cse0 main_~x~0) (<= .cse1 main_~x~0) .cse2)) (and (<= |main_#t~ret3| 91) (<= main_~result~0 91) (<= 91 main_~result~0) .cse2))) [2020-07-17 17:05:59,679 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 24 32) the Hoare annotation is: true [2020-07-17 17:05:59,679 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,679 INFO L264 CegarLoopResult]: At program point f91EXIT(lines 15 21) the Hoare annotation is: (let ((.cse0 (= f91_~x |f91_#in~x|))) (or (and (<= 91 |f91_#res|) (<= |f91_#res| 91) .cse0 (<= f91_~x 100)) (let ((.cse1 (+ |f91_#res| 10))) (and (<= .cse1 |f91_#in~x|) (<= |f91_#in~x| .cse1) .cse0 (<= 101 f91_~x))))) [2020-07-17 17:05:59,679 INFO L264 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,680 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (= f91_~x |f91_#in~x|) (<= 101 f91_~x)) [2020-07-17 17:05:59,680 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)) [2020-07-17 17:05:59,680 INFO L264 CegarLoopResult]: At program point L16(lines 16 20) the Hoare annotation is: (= f91_~x |f91_#in~x|) [2020-07-17 17:05:59,680 INFO L264 CegarLoopResult]: At program point L19-3(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (<= 91 |f91_#t~ret1|) (<= |f91_#t~ret1| 91) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,680 INFO L264 CegarLoopResult]: At program point L19-4(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (<= 91 |f91_#t~ret1|) (<= |f91_#t~ret1| 91) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,681 INFO L264 CegarLoopResult]: At program point L19-5(line 19) the Hoare annotation is: (and (<= |f91_#t~ret0| 101) (<= 91 |f91_#res|) (<= 91 |f91_#t~ret1|) (<= |f91_#res| 91) (<= |f91_#t~ret1| 91) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,681 INFO L264 CegarLoopResult]: At program point L19-6(line 19) the Hoare annotation is: (and (<= 91 |f91_#res|) (<= 91 |f91_#t~ret1|) (<= |f91_#res| 91) (<= |f91_#t~ret1| 91) (= f91_~x |f91_#in~x|) (<= f91_~x 100)) [2020-07-17 17:05:59,681 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-07-17 17:05:59,681 INFO L264 CegarLoopResult]: At program point f91FINAL(lines 15 21) the Hoare annotation is: (let ((.cse0 (= f91_~x |f91_#in~x|))) (or (and (<= 91 |f91_#res|) (<= |f91_#res| 91) .cse0 (<= f91_~x 100)) (let ((.cse1 (+ |f91_#res| 10))) (and (<= .cse1 |f91_#in~x|) (<= |f91_#in~x| .cse1) .cse0 (<= 101 f91_~x))))) [2020-07-17 17:05:59,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:05:59 BoogieIcfgContainer [2020-07-17 17:05:59,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:05:59,712 INFO L168 Benchmark]: Toolchain (without parser) took 2544.83 ms. Allocated memory was 137.9 MB in the beginning and 236.5 MB in the end (delta: 98.6 MB). Free memory was 102.8 MB in the beginning and 136.8 MB in the end (delta: -34.1 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,714 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.59 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,717 INFO L168 Benchmark]: Boogie Preprocessor took 39.97 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,719 INFO L168 Benchmark]: RCFGBuilder took 386.89 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 91.7 MB in the beginning and 171.5 MB in the end (delta: -79.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,721 INFO L168 Benchmark]: TraceAbstraction took 1826.54 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 171.5 MB in the beginning and 136.8 MB in the end (delta: 34.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:59,725 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.59 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.97 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 386.89 ms. Allocated memory was 137.9 MB in the beginning and 205.0 MB in the end (delta: 67.1 MB). Free memory was 91.7 MB in the beginning and 171.5 MB in the end (delta: -79.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1826.54 ms. Allocated memory was 205.0 MB in the beginning and 236.5 MB in the end (delta: 31.5 MB). Free memory was 171.5 MB in the beginning and 136.8 MB in the end (delta: 34.7 MB). Peak memory consumption was 66.1 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 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for f91 Derived contract for procedure f91: (((91 <= \result && \result <= 91) && x == \old(x)) && x <= 100) || (((\result + 10 <= \old(x) && \old(x) <= \result + 10) && x == \old(x)) && 101 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 38 SDslu, 172 SDs, 0 SdLazy, 174 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 31 LocationsWithAnnotation, 55 PreInvPairs, 74 NumberOfFragments, 292 HoareAnnotationTreeSize, 55 FomulaSimplifications, 40 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 70 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 6206 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 9/13 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...