/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:13:10,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:13:10,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:13:10,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:13:10,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:13:10,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:13:10,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:13:10,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:13:10,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:13:10,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:13:10,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:13:10,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:13:10,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:13:10,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:13:10,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:13:10,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:13:10,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:13:10,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:13:10,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:13:10,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:13:10,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:13:10,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:13:10,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:13:10,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:13:10,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:13:10,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:13:10,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:13:10,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:13:10,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:13:10,955 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:13:10,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:13:10,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:13:10,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:13:10,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:13:10,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:13:10,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:13:10,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:13:10,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:13:10,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:13:10,960 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:13:10,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:13:10,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:13:10,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:13:10,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:13:10,961 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:13:10,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:13:10,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:13:10,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:13:10,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:13:10,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:13:10,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:13:10,962 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:13:11,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:13:11,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:13:11,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:13:11,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:13:11,401 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:13:11,403 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-04 16:13:11,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af53c5da9/04e0b792d9c44c41834790a438235339/FLAGe466b7871 [2020-09-04 16:13:12,027 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:13:12,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-09-04 16:13:12,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af53c5da9/04e0b792d9c44c41834790a438235339/FLAGe466b7871 [2020-09-04 16:13:12,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af53c5da9/04e0b792d9c44c41834790a438235339 [2020-09-04 16:13:12,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:13:12,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:13:12,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:13:12,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:13:12,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:13:12,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12, skipping insertion in model container [2020-09-04 16:13:12,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:13:12,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:13:12,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:13:12,642 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:13:12,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:13:12,681 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:13:12,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12 WrapperNode [2020-09-04 16:13:12,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:13:12,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:13:12,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:13:12,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:13:12,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (1/1) ... [2020-09-04 16:13:12,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:13:12,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:13:12,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:13:12,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:13:12,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (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 16:13:12,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:13:12,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:13:12,863 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-09-04 16:13:12,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:13:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:13:12,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:13:12,864 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-09-04 16:13:12,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:13:12,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:13:12,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:13:13,140 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:13:13,140 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:13:13,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:13:13 BoogieIcfgContainer [2020-09-04 16:13:13,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:13:13,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:13:13,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:13:13,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:13:13,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:13:12" (1/3) ... [2020-09-04 16:13:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14efbf21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:13:13, skipping insertion in model container [2020-09-04 16:13:13,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:13:12" (2/3) ... [2020-09-04 16:13:13,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14efbf21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:13:13, skipping insertion in model container [2020-09-04 16:13:13,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:13:13" (3/3) ... [2020-09-04 16:13:13,170 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-09-04 16:13:13,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:13:13,190 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:13:13,211 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:13:13,236 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:13:13,236 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:13:13,236 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:13:13,236 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:13:13,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:13:13,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:13:13,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:13:13,237 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:13:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-09-04 16:13:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 16:13:13,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:13,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:13:13,268 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-09-04 16:13:13,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:13,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903710101] [2020-09-04 16:13:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:13,349 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:13,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:13,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:13,617 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 16:13:13,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903710101] [2020-09-04 16:13:13,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:13,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:13:13,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705116092] [2020-09-04 16:13:13,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:13:13,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:13:13,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:13:13,652 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-09-04 16:13:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:13,821 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-04 16:13:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:13:13,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 16:13:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:13,837 INFO L225 Difference]: With dead ends: 60 [2020-09-04 16:13:13,838 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 16:13:13,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:13:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 16:13:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-04 16:13:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 16:13:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-04 16:13:13,907 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-09-04 16:13:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:13,908 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-04 16:13:13,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:13:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-04 16:13:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 16:13:13,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:13,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:13:13,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:13:13,912 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-09-04 16:13:13,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:13,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19192874] [2020-09-04 16:13:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:13,916 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:13,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:13,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,007 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 16:13:14,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19192874] [2020-09-04 16:13:14,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:14,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:13:14,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860977990] [2020-09-04 16:13:14,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:13:14,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:13:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:13:14,011 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-09-04 16:13:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:14,094 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-09-04 16:13:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:13:14,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-04 16:13:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:14,096 INFO L225 Difference]: With dead ends: 46 [2020-09-04 16:13:14,096 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 16:13:14,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:13:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 16:13:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-09-04 16:13:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 16:13:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-09-04 16:13:14,111 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-09-04 16:13:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:14,112 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-09-04 16:13:14,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:13:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-09-04 16:13:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 16:13:14,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:14,114 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2020-09-04 16:13:14,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:13:14,115 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-09-04 16:13:14,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:14,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675658594] [2020-09-04 16:13:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:14,118 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 16:13:14,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675658594] [2020-09-04 16:13:14,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:14,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:13:14,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429089342] [2020-09-04 16:13:14,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:13:14,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:14,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:13:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:13:14,318 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-09-04 16:13:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:14,491 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-09-04 16:13:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:13:14,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-04 16:13:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:14,494 INFO L225 Difference]: With dead ends: 56 [2020-09-04 16:13:14,494 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 16:13:14,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:13:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 16:13:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-04 16:13:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 16:13:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-04 16:13:14,508 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2020-09-04 16:13:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:14,508 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-04 16:13:14,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:13:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-04 16:13:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 16:13:14,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:14,510 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2020-09-04 16:13:14,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:13:14,511 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2030561919, now seen corresponding path program 1 times [2020-09-04 16:13:14,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:14,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851091744] [2020-09-04 16:13:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:14,514 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 16:13:14,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851091744] [2020-09-04 16:13:14,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:14,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:13:14,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326975744] [2020-09-04 16:13:14,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:13:14,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:13:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:13:14,629 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-09-04 16:13:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:14,743 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-09-04 16:13:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:13:14,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-04 16:13:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:14,745 INFO L225 Difference]: With dead ends: 56 [2020-09-04 16:13:14,745 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 16:13:14,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:13:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 16:13:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-04 16:13:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 16:13:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-04 16:13:14,757 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2020-09-04 16:13:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:14,757 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-04 16:13:14,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:13:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-04 16:13:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:13:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:14,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2020-09-04 16:13:14,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:13:14,760 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2122258312, now seen corresponding path program 1 times [2020-09-04 16:13:14,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:14,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055659846] [2020-09-04 16:13:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:14,762 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 16:13:14,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055659846] [2020-09-04 16:13:14,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:14,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:13:14,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26492088] [2020-09-04 16:13:14,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:13:14,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:13:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:13:14,869 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-09-04 16:13:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:14,959 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-04 16:13:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:13:14,960 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 16:13:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:14,961 INFO L225 Difference]: With dead ends: 48 [2020-09-04 16:13:14,962 INFO L226 Difference]: Without dead ends: 42 [2020-09-04 16:13:14,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:13:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-04 16:13:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-04 16:13:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 16:13:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-09-04 16:13:14,972 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-09-04 16:13:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:14,973 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-09-04 16:13:14,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:13:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-09-04 16:13:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 16:13:14,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:14,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2020-09-04 16:13:14,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:13:14,975 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash 404002040, now seen corresponding path program 1 times [2020-09-04 16:13:14,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:14,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946257460] [2020-09-04 16:13:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:14,978 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 16:13:15,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946257460] [2020-09-04 16:13:15,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:15,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:13:15,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036370868] [2020-09-04 16:13:15,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:13:15,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:15,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:13:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:13:15,058 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-09-04 16:13:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:15,150 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-09-04 16:13:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:13:15,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 16:13:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:15,152 INFO L225 Difference]: With dead ends: 53 [2020-09-04 16:13:15,152 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 16:13:15,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:13:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 16:13:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-04 16:13:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 16:13:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-09-04 16:13:15,165 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2020-09-04 16:13:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:15,166 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-09-04 16:13:15,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:13:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-09-04 16:13:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 16:13:15,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:13:15,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:13:15,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:13:15,169 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:13:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:13:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1010225367, now seen corresponding path program 1 times [2020-09-04 16:13:15,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:13:15,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675515662] [2020-09-04 16:13:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:13:15,172 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:13:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:13:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:13:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 16:13:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:13:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 16:13:15,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675515662] [2020-09-04 16:13:15,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:13:15,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:13:15,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754708003] [2020-09-04 16:13:15,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:13:15,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:13:15,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:13:15,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:13:15,295 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-09-04 16:13:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:13:15,416 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-09-04 16:13:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 16:13:15,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-09-04 16:13:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:13:15,417 INFO L225 Difference]: With dead ends: 47 [2020-09-04 16:13:15,418 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 16:13:15,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:13:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 16:13:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 16:13:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 16:13:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 16:13:15,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-09-04 16:13:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:13:15,420 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 16:13:15,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:13:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 16:13:15,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 16:13:15,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:13:15,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 16:13:16,080 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2020-09-04 16:13:16,154 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,154 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,155 INFO L264 CegarLoopResult]: At program point gcdFINAL(lines 15 26) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-09-04 16:13:16,155 INFO L264 CegarLoopResult]: At program point gcdEXIT(lines 15 26) the Hoare annotation is: (let ((.cse0 (= gcd_~y2 |gcd_#in~y2|)) (.cse1 (= gcd_~y1 |gcd_#in~y1|))) (or (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) .cse0 .cse1) (and (<= 1 |gcd_#res|) .cse0 .cse1))) [2020-09-04 16:13:16,155 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,155 INFO L264 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,155 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-09-04 16:13:16,156 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-09-04 16:13:16,156 INFO L264 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,156 INFO L264 CegarLoopResult]: At program point L22(lines 22 24) the Hoare annotation is: (and (not (= gcd_~y1 gcd_~y2)) (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,156 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-09-04 16:13:16,156 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= 1 |gcd_#res|) (= gcd_~y2 |gcd_#in~y2|) (<= 1 |gcd_#t~ret1|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,157 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-09-04 16:13:16,157 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,157 INFO L264 CegarLoopResult]: At program point L23-3(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= 1 |gcd_#res|) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 |gcd_#t~ret0|)) [2020-09-04 16:13:16,157 INFO L264 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (and (<= 1 gcd_~y2) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-09-04 16:13:16,158 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0)) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-09-04 16:13:16,158 INFO L264 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-09-04 16:13:16,158 INFO L264 CegarLoopResult]: At program point L15(lines 15 26) the Hoare annotation is: (= gcd_~y1 |gcd_#in~y1|) [2020-09-04 16:13:16,158 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,158 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,158 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,159 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:13:16,159 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-09-04 16:13:16,159 INFO L264 CegarLoopResult]: At program point L33-1(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-09-04 16:13:16,159 INFO L271 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-09-04 16:13:16,159 INFO L264 CegarLoopResult]: At program point L33-2(line 33) the Hoare annotation is: (<= 1 main_~m~0) [2020-09-04 16:13:16,159 INFO L271 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-09-04 16:13:16,160 INFO L271 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: true [2020-09-04 16:13:16,160 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 28 43) the Hoare annotation is: true [2020-09-04 16:13:16,160 INFO L264 CegarLoopResult]: At program point L38(lines 38 42) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0)) [2020-09-04 16:13:16,160 INFO L271 CegarLoopResult]: At program point L38-1(lines 28 43) the Hoare annotation is: true [2020-09-04 16:13:16,161 INFO L264 CegarLoopResult]: At program point L34(lines 34 36) the Hoare annotation is: (<= 1 main_~m~0) [2020-09-04 16:13:16,161 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) the Hoare annotation is: false [2020-09-04 16:13:16,161 INFO L271 CegarLoopResult]: At program point L30(lines 30 32) the Hoare annotation is: true [2020-09-04 16:13:16,161 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-09-04 16:13:16,161 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-09-04 16:13:16,162 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: false [2020-09-04 16:13:16,162 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-09-04 16:13:16,162 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-09-04 16:13:16,162 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (<= 1 main_~m~0) [2020-09-04 16:13:16,163 INFO L264 CegarLoopResult]: At program point L37-2(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-09-04 16:13:16,163 INFO L264 CegarLoopResult]: At program point L37-3(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~z~0) (<= 1 main_~m~0) (<= 1 |main_#t~ret4|)) [2020-09-04 16:13:16,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:13:16 BoogieIcfgContainer [2020-09-04 16:13:16,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:13:16,190 INFO L168 Benchmark]: Toolchain (without parser) took 3795.22 ms. Allocated memory was 140.5 MB in the beginning and 243.8 MB in the end (delta: 103.3 MB). Free memory was 104.8 MB in the beginning and 113.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 94.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:16,190 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:13:16,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 94.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:16,192 INFO L168 Benchmark]: Boogie Preprocessor took 106.41 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.6 MB in the beginning and 183.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:16,193 INFO L168 Benchmark]: RCFGBuilder took 356.79 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 168.2 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:16,195 INFO L168 Benchmark]: TraceAbstraction took 3025.78 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 167.5 MB in the beginning and 113.5 MB in the end (delta: 54.0 MB). Peak memory consumption was 93.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:13:16,199 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 94.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.41 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.6 MB in the beginning and 183.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.79 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 168.2 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3025.78 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 167.5 MB in the beginning and 113.5 MB in the end (delta: 54.0 MB). Peak memory consumption was 93.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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: 15]: Procedure Contract for gcd Derived contract for procedure gcd: (((\old(y2) <= 0 || \old(y1) <= 0) && y2 == \old(y2)) && y1 == \old(y1)) || ((1 <= \result && y2 == \old(y2)) && y1 == \old(y1)) - ProcedureContractResult [Line: 28]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 215 SDslu, 754 SDs, 0 SdLazy, 352 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 43 LocationsWithAnnotation, 77 PreInvPairs, 139 NumberOfFragments, 341 HoareAnnotationTreeSize, 77 FomulaSimplifications, 1544 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 43 FomulaSimplificationsInter, 394 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...