/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:11:26,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:11:26,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:11:26,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:11:26,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:11:26,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:11:26,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:11:26,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:11:26,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:11:26,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:11:26,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:11:26,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 22:11:26,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:11:26,693 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:11:26,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:11:26,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:11:26,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:11:26,695 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:11:26,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:11:26,696 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:11:26,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:11:26,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:11:26,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:11:26,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:11:26,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:11:26,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:11:26,697 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:11:26,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:11:26,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:11:26,698 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:11:26,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:11:26,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:11:26,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:11:26,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:11:26,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:11:26,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:11:26,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:11:26,700 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:11:26,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:11:26,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:11:26,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:11:26,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:11:26,978 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:11:26,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2019-11-23 22:11:27,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e38b836c/2e5b04ec4b3c400982fd8491ae25c3aa/FLAG473eebc0e [2019-11-23 22:11:27,514 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:11:27,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2019-11-23 22:11:27,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e38b836c/2e5b04ec4b3c400982fd8491ae25c3aa/FLAG473eebc0e [2019-11-23 22:11:27,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e38b836c/2e5b04ec4b3c400982fd8491ae25c3aa [2019-11-23 22:11:27,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:11:27,941 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:11:27,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:27,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:11:27,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:11:27,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:27" (1/1) ... [2019-11-23 22:11:27,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a840e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:27, skipping insertion in model container [2019-11-23 22:11:27,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:11:27" (1/1) ... [2019-11-23 22:11:27,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:11:27,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:11:28,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:28,169 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:11:28,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:11:28,198 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:11:28,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28 WrapperNode [2019-11-23 22:11:28,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:11:28,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:28,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:11:28,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:11:28,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:11:28,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:11:28,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:11:28,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:11:28,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (1/1) ... [2019-11-23 22:11:28,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:11:28,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:11:28,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:11:28,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:11:28,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (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 [2019-11-23 22:11:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:11:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:11:28,534 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:11:28,535 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:11:28,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:28 BoogieIcfgContainer [2019-11-23 22:11:28,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:11:28,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:11:28,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:11:28,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:11:28,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:11:27" (1/3) ... [2019-11-23 22:11:28,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba9c298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:28, skipping insertion in model container [2019-11-23 22:11:28,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:11:28" (2/3) ... [2019-11-23 22:11:28,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba9c298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:11:28, skipping insertion in model container [2019-11-23 22:11:28,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:11:28" (3/3) ... [2019-11-23 22:11:28,544 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2019-11-23 22:11:28,554 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:11:28,561 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:11:28,572 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:11:28,597 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:11:28,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:11:28,598 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:11:28,598 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:11:28,598 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:11:28,598 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:11:28,599 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:11:28,599 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:11:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:11:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:11:28,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,617 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:11:28,617 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,622 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-11-23 22:11:28,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660140446] [2019-11-23 22:11:28,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660140446] [2019-11-23 22:11:28,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:28,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:11:28,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851359309] [2019-11-23 22:11:28,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:11:28,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:11:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:28,742 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-23 22:11:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:28,760 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-23 22:11:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:11:28,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-23 22:11:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:28,770 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:11:28,770 INFO L226 Difference]: Without dead ends: 7 [2019-11-23 22:11:28,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:11:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-23 22:11:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-23 22:11:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-23 22:11:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-23 22:11:28,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2019-11-23 22:11:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:28,800 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-23 22:11:28,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:11:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-23 22:11:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:11:28,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,801 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:11:28,802 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash 29810958, now seen corresponding path program 1 times [2019-11-23 22:11:28,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808327850] [2019-11-23 22:11:28,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808327850] [2019-11-23 22:11:28,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:11:28,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:11:28,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575713982] [2019-11-23 22:11:28,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:28,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:28,835 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2019-11-23 22:11:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:28,915 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-23 22:11:28,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:28,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 22:11:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:28,917 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:11:28,917 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:11:28,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:11:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:11:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 22:11:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:11:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-23 22:11:28,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2019-11-23 22:11:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:28,923 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-23 22:11:28,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-23 22:11:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:11:28,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:28,925 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:28,925 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1366097711, now seen corresponding path program 1 times [2019-11-23 22:11:28,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:28,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93419713] [2019-11-23 22:11:28,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:28,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93419713] [2019-11-23 22:11:28,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306129056] [2019-11-23 22:11:28,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:29,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:11:29,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:11:29,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2019-11-23 22:11:29,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888684761] [2019-11-23 22:11:29,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:11:29,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:11:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:11:29,067 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2019-11-23 22:11:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:29,102 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-23 22:11:29,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:11:29,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 22:11:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:29,104 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:11:29,104 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:11:29,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:11:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:11:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-23 22:11:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:11:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 22:11:29,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2019-11-23 22:11:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:29,109 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 22:11:29,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:11:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 22:11:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:11:29,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:29,110 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:29,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,313 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1492282070, now seen corresponding path program 1 times [2019-11-23 22:11:29,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:29,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404555418] [2019-11-23 22:11:29,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404555418] [2019-11-23 22:11:29,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711283660] [2019-11-23 22:11:29,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:29,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:11:29,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:29,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-23 22:11:29,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859978435] [2019-11-23 22:11:29,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:11:29,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:29,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:11:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:29,388 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2019-11-23 22:11:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:29,408 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-23 22:11:29,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:11:29,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:11:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:29,410 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:11:29,410 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:11:29,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:11:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:11:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:11:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:11:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:11:29,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2019-11-23 22:11:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:29,415 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:11:29,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:11:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:11:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:11:29,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:29,416 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:29,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,625 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2136142105, now seen corresponding path program 2 times [2019-11-23 22:11:29,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:29,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214544974] [2019-11-23 22:11:29,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214544974] [2019-11-23 22:11:29,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102069968] [2019-11-23 22:11:29,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:29,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:29,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:29,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:11:29,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:29,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:29,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-23 22:11:29,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807752692] [2019-11-23 22:11:29,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:11:29,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:29,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:11:29,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:11:29,766 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2019-11-23 22:11:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:29,799 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-23 22:11:29,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:11:29,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 22:11:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:29,800 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:11:29,800 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:11:29,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:11:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:11:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:11:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:11:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-23 22:11:29,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-11-23 22:11:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:29,806 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-23 22:11:29,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:11:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-23 22:11:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:11:29,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:29,807 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:11:30,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,008 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -368533665, now seen corresponding path program 3 times [2019-11-23 22:11:30,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:30,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642411396] [2019-11-23 22:11:30,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:30,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642411396] [2019-11-23 22:11:30,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939288044] [2019-11-23 22:11:30,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:11:30,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:11:30,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:30,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:11:30,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:11:30,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:30,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2019-11-23 22:11:30,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750660226] [2019-11-23 22:11:30,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:11:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:11:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:11:30,192 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2019-11-23 22:11:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:30,279 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2019-11-23 22:11:30,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:11:30,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-23 22:11:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:30,289 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:11:30,289 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:11:30,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:11:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:11:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 22:11:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:11:30,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 22:11:30,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-11-23 22:11:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:30,302 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 22:11:30,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:11:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 22:11:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:11:30,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:30,316 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2019-11-23 22:11:30,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,521 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1336541098, now seen corresponding path program 4 times [2019-11-23 22:11:30,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:30,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735348464] [2019-11-23 22:11:30,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:30,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735348464] [2019-11-23 22:11:30,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079336949] [2019-11-23 22:11:30,646 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:11:30,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:30,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:11:30,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:30,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:30,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2019-11-23 22:11:30,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309215044] [2019-11-23 22:11:30,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:11:30,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:11:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:11:30,687 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2019-11-23 22:11:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:30,752 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-11-23 22:11:30,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:11:30,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-23 22:11:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:30,753 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:11:30,753 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:11:30,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:11:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:11:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 22:11:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:11:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 22:11:30,760 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2019-11-23 22:11:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:30,760 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 22:11:30,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:11:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 22:11:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:11:30,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:30,761 INFO L410 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1] [2019-11-23 22:11:30,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:30,973 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash 825274035, now seen corresponding path program 5 times [2019-11-23 22:11:30,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:30,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244193177] [2019-11-23 22:11:30,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:31,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244193177] [2019-11-23 22:11:31,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028032034] [2019-11-23 22:11:31,150 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:31,196 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:11:31,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:31,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:11:31,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:11:31,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:31,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2019-11-23 22:11:31,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629383165] [2019-11-23 22:11:31,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:11:31,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:11:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:11:31,212 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2019-11-23 22:11:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:31,289 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-11-23 22:11:31,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:11:31,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-23 22:11:31,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:31,290 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:11:31,290 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:11:31,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:11:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:11:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 22:11:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:11:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 22:11:31,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2019-11-23 22:11:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:31,299 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 22:11:31,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:11:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 22:11:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:11:31,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:31,300 INFO L410 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1] [2019-11-23 22:11:31,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:31,504 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1798294788, now seen corresponding path program 6 times [2019-11-23 22:11:31,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:31,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551458044] [2019-11-23 22:11:31,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:31,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551458044] [2019-11-23 22:11:31,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817909474] [2019-11-23 22:11:31,795 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:31,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:11:31,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:31,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:11:31,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 22:11:31,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:31,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 20 [2019-11-23 22:11:31,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763467908] [2019-11-23 22:11:31,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:11:31,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:11:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:31,922 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2019-11-23 22:11:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:32,028 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-11-23 22:11:32,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:11:32,029 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2019-11-23 22:11:32,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:32,030 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:11:32,030 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:11:32,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:11:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:11:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 22:11:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:11:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-23 22:11:32,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2019-11-23 22:11:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:32,037 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-23 22:11:32,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:11:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-23 22:11:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:11:32,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,039 INFO L410 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:32,239 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1978996342, now seen corresponding path program 7 times [2019-11-23 22:11:32,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208055749] [2019-11-23 22:11:32,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:32,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208055749] [2019-11-23 22:11:32,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154585235] [2019-11-23 22:11:32,520 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:32,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:11:32,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:11:32,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:32,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 20 [2019-11-23 22:11:32,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327461404] [2019-11-23 22:11:32,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:11:32,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:11:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:11:32,582 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 21 states. [2019-11-23 22:11:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:32,665 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-23 22:11:32,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:11:32,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2019-11-23 22:11:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:32,667 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:11:32,667 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:11:32,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:11:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:11:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 22:11:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:11:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-23 22:11:32,674 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2019-11-23 22:11:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:32,675 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-23 22:11:32,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:11:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-23 22:11:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:11:32,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:32,676 INFO L410 BasicCegarLoop]: trace histogram [22, 19, 3, 1, 1, 1, 1, 1] [2019-11-23 22:11:32,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:32,880 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -388925930, now seen corresponding path program 8 times [2019-11-23 22:11:32,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:32,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889076152] [2019-11-23 22:11:32,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:33,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889076152] [2019-11-23 22:11:33,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979245640] [2019-11-23 22:11:33,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:33,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:33,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:33,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:11:33,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 100 proven. 380 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:11:33,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:33,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 24 [2019-11-23 22:11:33,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737502258] [2019-11-23 22:11:33,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:11:33,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:11:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:11:33,292 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 25 states. [2019-11-23 22:11:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:33,390 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2019-11-23 22:11:33,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:11:33,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2019-11-23 22:11:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:33,392 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:11:33,392 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:11:33,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:11:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:11:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 22:11:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:11:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-23 22:11:33,400 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2019-11-23 22:11:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:33,400 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-23 22:11:33,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:11:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-23 22:11:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:11:33,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:33,402 INFO L410 BasicCegarLoop]: trace histogram [26, 23, 3, 1, 1, 1, 1, 1] [2019-11-23 22:11:33,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:33,605 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1548175710, now seen corresponding path program 9 times [2019-11-23 22:11:33,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:33,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855864244] [2019-11-23 22:11:33,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:34,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855864244] [2019-11-23 22:11:34,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056657489] [2019-11-23 22:11:34,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:34,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:11:34,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:34,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:11:34,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 161 proven. 9 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2019-11-23 22:11:34,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:34,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6] total 33 [2019-11-23 22:11:34,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756310628] [2019-11-23 22:11:34,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:11:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:11:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:11:34,195 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 33 states. [2019-11-23 22:11:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:34,355 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2019-11-23 22:11:34,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:11:34,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 57 [2019-11-23 22:11:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:34,357 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:11:34,357 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:11:34,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:11:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:11:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 22:11:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:11:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-11-23 22:11:34,365 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 57 [2019-11-23 22:11:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:34,366 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-11-23 22:11:34,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:11:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-11-23 22:11:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:11:34,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:34,367 INFO L410 BasicCegarLoop]: trace histogram [31, 27, 4, 1, 1, 1, 1, 1] [2019-11-23 22:11:34,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:34,571 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1150619149, now seen corresponding path program 10 times [2019-11-23 22:11:34,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:34,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774245269] [2019-11-23 22:11:34,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:35,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774245269] [2019-11-23 22:11:35,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043346372] [2019-11-23 22:11:35,115 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:35,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:35,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:35,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:11:35,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:11:35,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:35,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 33 [2019-11-23 22:11:35,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676623800] [2019-11-23 22:11:35,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:11:35,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:35,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:11:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:11:35,177 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 34 states. [2019-11-23 22:11:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:35,333 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2019-11-23 22:11:35,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:11:35,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2019-11-23 22:11:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:35,334 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:11:35,334 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:11:35,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:11:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:11:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-23 22:11:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 22:11:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-23 22:11:35,343 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2019-11-23 22:11:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:35,343 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-23 22:11:35,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:11:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-23 22:11:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 22:11:35,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:35,345 INFO L410 BasicCegarLoop]: trace histogram [36, 32, 4, 1, 1, 1, 1, 1] [2019-11-23 22:11:35,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:35,548 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash 351932674, now seen corresponding path program 11 times [2019-11-23 22:11:35,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:35,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136711389] [2019-11-23 22:11:35,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:36,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136711389] [2019-11-23 22:11:36,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241020793] [2019-11-23 22:11:36,218 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-11-23 22:11:36,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:36,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:11:36,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 231 proven. 1056 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:11:36,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:36,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 38 [2019-11-23 22:11:36,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919642562] [2019-11-23 22:11:36,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:11:36,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:11:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:11:36,337 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 39 states. [2019-11-23 22:11:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:36,522 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2019-11-23 22:11:36,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:11:36,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2019-11-23 22:11:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:36,523 INFO L225 Difference]: With dead ends: 101 [2019-11-23 22:11:36,523 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 22:11:36,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:11:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 22:11:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-23 22:11:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:11:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:11:36,532 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2019-11-23 22:11:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:36,533 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:11:36,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:11:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:11:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:11:36,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:36,534 INFO L410 BasicCegarLoop]: trace histogram [41, 37, 4, 1, 1, 1, 1, 1] [2019-11-23 22:11:36,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:36,739 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1926555985, now seen corresponding path program 12 times [2019-11-23 22:11:36,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:36,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284958512] [2019-11-23 22:11:36,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:37,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284958512] [2019-11-23 22:11:37,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604048161] [2019-11-23 22:11:37,666 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:37,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:11:37,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:37,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:11:37,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 333 proven. 16 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-11-23 22:11:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 7] total 49 [2019-11-23 22:11:37,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121045713] [2019-11-23 22:11:37,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:11:37,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:11:37,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:11:37,903 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 49 states. [2019-11-23 22:11:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:38,095 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2019-11-23 22:11:38,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:11:38,095 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 87 [2019-11-23 22:11:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:38,097 INFO L225 Difference]: With dead ends: 114 [2019-11-23 22:11:38,097 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 22:11:38,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:11:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 22:11:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-23 22:11:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:11:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2019-11-23 22:11:38,106 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 87 [2019-11-23 22:11:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:38,106 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2019-11-23 22:11:38,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:11:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2019-11-23 22:11:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:11:38,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:38,108 INFO L410 BasicCegarLoop]: trace histogram [47, 42, 5, 1, 1, 1, 1, 1] [2019-11-23 22:11:38,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:38,311 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1558049499, now seen corresponding path program 13 times [2019-11-23 22:11:38,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:38,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606395179] [2019-11-23 22:11:38,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:39,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606395179] [2019-11-23 22:11:39,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798398823] [2019-11-23 22:11:39,279 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:39,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 22:11:39,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 387 proven. 1806 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:11:39,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:39,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 44] total 49 [2019-11-23 22:11:39,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829179416] [2019-11-23 22:11:39,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:11:39,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:11:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:11:39,358 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 50 states. [2019-11-23 22:11:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:39,628 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2019-11-23 22:11:39,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:11:39,630 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2019-11-23 22:11:39,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:39,631 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:11:39,631 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:11:39,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:11:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:11:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-11-23 22:11:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:11:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2019-11-23 22:11:39,639 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 99 [2019-11-23 22:11:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:39,639 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2019-11-23 22:11:39,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:11:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2019-11-23 22:11:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:11:39,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:39,641 INFO L410 BasicCegarLoop]: trace histogram [53, 48, 5, 1, 1, 1, 1, 1] [2019-11-23 22:11:39,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:39,848 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 770930935, now seen corresponding path program 14 times [2019-11-23 22:11:39,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:39,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859137556] [2019-11-23 22:11:39,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:41,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859137556] [2019-11-23 22:11:41,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067290660] [2019-11-23 22:11:41,009 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:41,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:41,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:41,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 22:11:41,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 441 proven. 2352 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:11:41,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:41,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 50] total 55 [2019-11-23 22:11:41,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619449690] [2019-11-23 22:11:41,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:11:41,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:11:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:11:41,095 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 56 states. [2019-11-23 22:11:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:41,294 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2019-11-23 22:11:41,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 22:11:41,295 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2019-11-23 22:11:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:41,296 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:11:41,296 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:11:41,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:11:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:11:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-11-23 22:11:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:11:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2019-11-23 22:11:41,303 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 111 [2019-11-23 22:11:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:41,304 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2019-11-23 22:11:41,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:11:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2019-11-23 22:11:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:11:41,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:41,305 INFO L410 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1] [2019-11-23 22:11:41,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:41,508 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash 9489469, now seen corresponding path program 15 times [2019-11-23 22:11:41,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:41,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950826420] [2019-11-23 22:11:41,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:42,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950826420] [2019-11-23 22:11:42,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704681222] [2019-11-23 22:11:42,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:42,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:11:42,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:42,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:11:42,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-11-23 22:11:42,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:42,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 8] total 58 [2019-11-23 22:11:42,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451132829] [2019-11-23 22:11:42,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 22:11:42,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 22:11:42,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 22:11:42,780 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 58 states. [2019-11-23 22:11:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:42,982 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2019-11-23 22:11:42,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 22:11:42,982 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 115 [2019-11-23 22:11:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:42,983 INFO L225 Difference]: With dead ends: 123 [2019-11-23 22:11:42,983 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 22:11:42,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 22:11:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 22:11:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-11-23 22:11:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 22:11:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2019-11-23 22:11:42,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 115 [2019-11-23 22:11:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:42,990 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2019-11-23 22:11:42,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 22:11:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2019-11-23 22:11:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 22:11:42,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:42,992 INFO L410 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1] [2019-11-23 22:11:43,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:43,195 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 581634882, now seen corresponding path program 16 times [2019-11-23 22:11:43,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:43,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046453723] [2019-11-23 22:11:43,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:44,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046453723] [2019-11-23 22:11:44,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096856666] [2019-11-23 22:11:44,700 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:44,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:11:44,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:44,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-23 22:11:44,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:44,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:44,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2019-11-23 22:11:44,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971204332] [2019-11-23 22:11:44,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 22:11:44,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 22:11:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 22:11:44,792 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 59 states. [2019-11-23 22:11:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:45,057 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-11-23 22:11:45,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 22:11:45,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 117 [2019-11-23 22:11:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:45,058 INFO L225 Difference]: With dead ends: 125 [2019-11-23 22:11:45,058 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 22:11:45,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 22:11:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 22:11:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-23 22:11:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:11:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2019-11-23 22:11:45,065 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 117 [2019-11-23 22:11:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:45,065 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2019-11-23 22:11:45,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 22:11:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2019-11-23 22:11:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:11:45,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:45,067 INFO L410 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1] [2019-11-23 22:11:45,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:45,271 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash 657562887, now seen corresponding path program 17 times [2019-11-23 22:11:45,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:45,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153971324] [2019-11-23 22:11:45,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:46,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153971324] [2019-11-23 22:11:46,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310975628] [2019-11-23 22:11:46,580 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:46,669 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2019-11-23 22:11:46,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:46,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:11:46,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1653 proven. 784 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2019-11-23 22:11:47,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:47,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 31] total 81 [2019-11-23 22:11:47,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404879321] [2019-11-23 22:11:47,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-11-23 22:11:47,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-11-23 22:11:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 22:11:47,701 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand 81 states. [2019-11-23 22:11:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:48,131 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2019-11-23 22:11:48,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-23 22:11:48,131 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 119 [2019-11-23 22:11:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:48,133 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:11:48,133 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 22:11:48,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 22:11:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 22:11:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 22:11:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:11:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2019-11-23 22:11:48,141 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 119 [2019-11-23 22:11:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:48,142 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2019-11-23 22:11:48,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-11-23 22:11:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2019-11-23 22:11:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:11:48,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:48,144 INFO L410 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1] [2019-11-23 22:11:48,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:48,347 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash 244345781, now seen corresponding path program 18 times [2019-11-23 22:11:48,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:48,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976874721] [2019-11-23 22:11:48,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:50,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976874721] [2019-11-23 22:11:50,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453564194] [2019-11-23 22:11:50,697 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:50,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2019-11-23 22:11:50,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:50,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:11:50,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3157 proven. 1444 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-23 22:11:51,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:51,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 41] total 91 [2019-11-23 22:11:51,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992680690] [2019-11-23 22:11:51,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-11-23 22:11:51,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:51,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-11-23 22:11:51,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-11-23 22:11:51,407 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand 91 states. [2019-11-23 22:11:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:52,167 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2019-11-23 22:11:52,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-11-23 22:11:52,167 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 163 [2019-11-23 22:11:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:52,169 INFO L225 Difference]: With dead ends: 189 [2019-11-23 22:11:52,169 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 22:11:52,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2019-11-23 22:11:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 22:11:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-11-23 22:11:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:11:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2019-11-23 22:11:52,177 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 163 [2019-11-23 22:11:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:52,178 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2019-11-23 22:11:52,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-11-23 22:11:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2019-11-23 22:11:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:11:52,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:52,179 INFO L410 BasicCegarLoop]: trace histogram [89, 50, 39, 1, 1, 1, 1, 1] [2019-11-23 22:11:52,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:52,386 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash 199000487, now seen corresponding path program 19 times [2019-11-23 22:11:52,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:52,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233893086] [2019-11-23 22:11:52,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:55,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233893086] [2019-11-23 22:11:55,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22599506] [2019-11-23 22:11:55,327 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:55,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-23 22:11:55,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:55,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:55,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2019-11-23 22:11:55,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556604031] [2019-11-23 22:11:55,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-11-23 22:11:55,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-11-23 22:11:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:11:55,475 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand 92 states. [2019-11-23 22:11:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:11:56,066 INFO L93 Difference]: Finished difference Result 191 states and 232 transitions. [2019-11-23 22:11:56,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-11-23 22:11:56,068 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 183 [2019-11-23 22:11:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:11:56,069 INFO L225 Difference]: With dead ends: 191 [2019-11-23 22:11:56,069 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:11:56,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 22:11:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:11:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:11:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:11:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 226 transitions. [2019-11-23 22:11:56,076 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 226 transitions. Word has length 183 [2019-11-23 22:11:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:11:56,077 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 226 transitions. [2019-11-23 22:11:56,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-11-23 22:11:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 226 transitions. [2019-11-23 22:11:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:11:56,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:11:56,078 INFO L410 BasicCegarLoop]: trace histogram [90, 50, 40, 1, 1, 1, 1, 1] [2019-11-23 22:11:56,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:56,280 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:11:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:11:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1981870548, now seen corresponding path program 20 times [2019-11-23 22:11:56,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:11:56,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721605784] [2019-11-23 22:11:56,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:11:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:11:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:59,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721605784] [2019-11-23 22:11:59,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142795657] [2019-11-23 22:11:59,557 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:11:59,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:11:59,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:11:59,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 92 conjunts are in the unsatisfiable core [2019-11-23 22:11:59,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:11:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:11:59,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:11:59,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2019-11-23 22:11:59,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830255346] [2019-11-23 22:11:59,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-11-23 22:11:59,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:11:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-11-23 22:11:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:11:59,694 INFO L87 Difference]: Start difference. First operand 186 states and 226 transitions. Second operand 93 states. [2019-11-23 22:12:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:00,375 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2019-11-23 22:12:00,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-11-23 22:12:00,376 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 185 [2019-11-23 22:12:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:00,377 INFO L225 Difference]: With dead ends: 193 [2019-11-23 22:12:00,377 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:12:00,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:12:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:12:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:12:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:12:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 229 transitions. [2019-11-23 22:12:00,385 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 229 transitions. Word has length 185 [2019-11-23 22:12:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:00,386 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 229 transitions. [2019-11-23 22:12:00,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-11-23 22:12:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 229 transitions. [2019-11-23 22:12:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:12:00,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:00,387 INFO L410 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1] [2019-11-23 22:12:00,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:00,591 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1854894735, now seen corresponding path program 21 times [2019-11-23 22:12:00,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:00,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147829152] [2019-11-23 22:12:00,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:03,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147829152] [2019-11-23 22:12:03,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703835059] [2019-11-23 22:12:03,692 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:03,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-11-23 22:12:03,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:03,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 22:12:03,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4150 proven. 1681 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2019-11-23 22:12:03,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:03,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 44] total 94 [2019-11-23 22:12:03,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268926648] [2019-11-23 22:12:03,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-23 22:12:03,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-23 22:12:03,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 22:12:03,898 INFO L87 Difference]: Start difference. First operand 188 states and 229 transitions. Second operand 94 states. [2019-11-23 22:12:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:04,555 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2019-11-23 22:12:04,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-11-23 22:12:04,556 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 187 [2019-11-23 22:12:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:04,557 INFO L225 Difference]: With dead ends: 195 [2019-11-23 22:12:04,557 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:12:04,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 22:12:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:12:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 22:12:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 22:12:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 232 transitions. [2019-11-23 22:12:04,564 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 232 transitions. Word has length 187 [2019-11-23 22:12:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:04,564 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 232 transitions. [2019-11-23 22:12:04,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-11-23 22:12:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 232 transitions. [2019-11-23 22:12:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 22:12:04,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:04,566 INFO L410 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1] [2019-11-23 22:12:04,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:04,769 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash -90222730, now seen corresponding path program 22 times [2019-11-23 22:12:04,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:04,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116849137] [2019-11-23 22:12:04,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:07,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116849137] [2019-11-23 22:12:07,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920907213] [2019-11-23 22:12:07,895 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:07,975 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:07,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:07,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 94 conjunts are in the unsatisfiable core [2019-11-23 22:12:07,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:08,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2019-11-23 22:12:08,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994248684] [2019-11-23 22:12:08,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-11-23 22:12:08,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-11-23 22:12:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-23 22:12:08,039 INFO L87 Difference]: Start difference. First operand 190 states and 232 transitions. Second operand 95 states. [2019-11-23 22:12:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:08,874 INFO L93 Difference]: Finished difference Result 197 states and 241 transitions. [2019-11-23 22:12:08,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-11-23 22:12:08,874 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2019-11-23 22:12:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:08,875 INFO L225 Difference]: With dead ends: 197 [2019-11-23 22:12:08,876 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 22:12:08,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-23 22:12:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 22:12:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-23 22:12:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:12:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2019-11-23 22:12:08,882 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 189 [2019-11-23 22:12:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:08,882 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2019-11-23 22:12:08,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-11-23 22:12:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2019-11-23 22:12:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:12:08,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:08,884 INFO L410 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1] [2019-11-23 22:12:09,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:09,087 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash -752507845, now seen corresponding path program 23 times [2019-11-23 22:12:09,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:09,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126829467] [2019-11-23 22:12:09,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126829467] [2019-11-23 22:12:12,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871597489] [2019-11-23 22:12:12,301 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,465 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2019-11-23 22:12:12,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:12,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 4371 proven. 2116 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-11-23 22:12:12,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:12,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 49] total 99 [2019-11-23 22:12:12,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045950564] [2019-11-23 22:12:12,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-11-23 22:12:12,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-11-23 22:12:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 22:12:12,687 INFO L87 Difference]: Start difference. First operand 192 states and 235 transitions. Second operand 99 states. [2019-11-23 22:12:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:13,369 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2019-11-23 22:12:13,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-11-23 22:12:13,371 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 191 [2019-11-23 22:12:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:13,372 INFO L225 Difference]: With dead ends: 205 [2019-11-23 22:12:13,372 INFO L226 Difference]: Without dead ends: 201 [2019-11-23 22:12:13,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 22:12:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-23 22:12:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2019-11-23 22:12:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 22:12:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 247 transitions. [2019-11-23 22:12:13,379 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 247 transitions. Word has length 191 [2019-11-23 22:12:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:13,380 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 247 transitions. [2019-11-23 22:12:13,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-11-23 22:12:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 247 transitions. [2019-11-23 22:12:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:12:13,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:13,381 INFO L410 BasicCegarLoop]: trace histogram [97, 50, 47, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,584 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,585 INFO L82 PathProgramCache]: Analyzing trace with hash 264041167, now seen corresponding path program 24 times [2019-11-23 22:12:13,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337075089] [2019-11-23 22:12:13,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337075089] [2019-11-23 22:12:17,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222677210] [2019-11-23 22:12:17,029 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2019-11-23 22:12:17,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:17,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:17,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2019-11-23 22:12:17,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774262373] [2019-11-23 22:12:17,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-23 22:12:17,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-23 22:12:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 22:12:17,278 INFO L87 Difference]: Start difference. First operand 200 states and 247 transitions. Second operand 100 states. [2019-11-23 22:12:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,634 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2019-11-23 22:12:18,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-11-23 22:12:18,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 199 [2019-11-23 22:12:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,636 INFO L225 Difference]: With dead ends: 207 [2019-11-23 22:12:18,636 INFO L226 Difference]: Without dead ends: 203 [2019-11-23 22:12:18,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 22:12:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-23 22:12:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-11-23 22:12:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-23 22:12:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 250 transitions. [2019-11-23 22:12:18,643 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 250 transitions. Word has length 199 [2019-11-23 22:12:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,643 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 250 transitions. [2019-11-23 22:12:18,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-11-23 22:12:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 250 transitions. [2019-11-23 22:12:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-23 22:12:18,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,644 INFO L410 BasicCegarLoop]: trace histogram [98, 50, 48, 1, 1, 1, 1, 1] [2019-11-23 22:12:18,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,849 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 392680788, now seen corresponding path program 25 times [2019-11-23 22:12:18,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:18,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007673744] [2019-11-23 22:12:18,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:22,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007673744] [2019-11-23 22:12:22,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116738030] [2019-11-23 22:12:22,407 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:22,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-23 22:12:22,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:22,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:22,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2019-11-23 22:12:22,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410404665] [2019-11-23 22:12:22,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-11-23 22:12:22,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:22,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-11-23 22:12:22,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 22:12:22,533 INFO L87 Difference]: Start difference. First operand 202 states and 250 transitions. Second operand 101 states. [2019-11-23 22:12:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:23,773 INFO L93 Difference]: Finished difference Result 209 states and 259 transitions. [2019-11-23 22:12:23,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-11-23 22:12:23,774 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2019-11-23 22:12:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:23,776 INFO L225 Difference]: With dead ends: 209 [2019-11-23 22:12:23,776 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 22:12:23,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-23 22:12:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 22:12:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2019-11-23 22:12:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 22:12:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2019-11-23 22:12:23,785 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 201 [2019-11-23 22:12:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:23,786 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2019-11-23 22:12:23,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-11-23 22:12:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2019-11-23 22:12:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 22:12:23,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:23,788 INFO L410 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1] [2019-11-23 22:12:23,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:23,993 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -538695015, now seen corresponding path program 26 times [2019-11-23 22:12:23,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:23,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058171853] [2019-11-23 22:12:23,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:28,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058171853] [2019-11-23 22:12:28,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545786947] [2019-11-23 22:12:28,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:28,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:28,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-23 22:12:28,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:28,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:28,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2019-11-23 22:12:28,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84658482] [2019-11-23 22:12:28,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-11-23 22:12:28,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-11-23 22:12:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 22:12:28,492 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand 102 states. [2019-11-23 22:12:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:29,345 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2019-11-23 22:12:29,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-11-23 22:12:29,345 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 203 [2019-11-23 22:12:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:29,348 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:12:29,348 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 22:12:29,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 22:12:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 22:12:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2019-11-23 22:12:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 22:12:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2019-11-23 22:12:29,356 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 203 [2019-11-23 22:12:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:29,356 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2019-11-23 22:12:29,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-11-23 22:12:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2019-11-23 22:12:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 22:12:29,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:29,358 INFO L410 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1] [2019-11-23 22:12:29,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:29,561 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:29,562 INFO L82 PathProgramCache]: Analyzing trace with hash 2057323166, now seen corresponding path program 27 times [2019-11-23 22:12:29,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:29,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529369650] [2019-11-23 22:12:29,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-11-23 22:12:31,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529369650] [2019-11-23 22:12:31,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345138441] [2019-11-23 22:12:31,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:31,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2019-11-23 22:12:31,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:31,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 108 conjunts are in the unsatisfiable core [2019-11-23 22:12:31,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:31,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-11-23 22:12:31,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:12:31,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2019-11-23 22:12:31,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934679342] [2019-11-23 22:12:31,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:12:31,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:12:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:12:31,794 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand 55 states. [2019-11-23 22:12:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:33,614 INFO L93 Difference]: Finished difference Result 2861 states and 4236 transitions. [2019-11-23 22:12:33,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:12:33,614 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2019-11-23 22:12:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:33,627 INFO L225 Difference]: With dead ends: 2861 [2019-11-23 22:12:33,628 INFO L226 Difference]: Without dead ends: 2857 [2019-11-23 22:12:33,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:12:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2019-11-23 22:12:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 208. [2019-11-23 22:12:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 22:12:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 259 transitions. [2019-11-23 22:12:33,673 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 259 transitions. Word has length 205 [2019-11-23 22:12:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:33,673 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 259 transitions. [2019-11-23 22:12:33,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:12:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 259 transitions. [2019-11-23 22:12:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 22:12:33,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:33,675 INFO L410 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1] [2019-11-23 22:12:33,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:33,880 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1454796131, now seen corresponding path program 28 times [2019-11-23 22:12:33,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:33,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771346649] [2019-11-23 22:12:33,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2019-11-23 22:12:35,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771346649] [2019-11-23 22:12:35,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:35,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2019-11-23 22:12:35,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516073569] [2019-11-23 22:12:35,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:12:35,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:35,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:12:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:12:35,758 INFO L87 Difference]: Start difference. First operand 208 states and 259 transitions. Second operand 52 states. [2019-11-23 22:12:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:35,976 INFO L93 Difference]: Finished difference Result 307 states and 407 transitions. [2019-11-23 22:12:35,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:12:35,977 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2019-11-23 22:12:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:35,977 INFO L225 Difference]: With dead ends: 307 [2019-11-23 22:12:35,977 INFO L226 Difference]: Without dead ends: 0 [2019-11-23 22:12:35,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:12:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-23 22:12:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-23 22:12:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-23 22:12:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-23 22:12:35,980 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2019-11-23 22:12:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:35,980 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-23 22:12:35,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:12:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-23 22:12:35,980 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-23 22:12:35,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-23 22:12:37,069 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2019-11-23 22:12:38,760 WARN L192 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2019-11-23 22:12:38,766 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-23 22:12:38,766 INFO L444 ceAbstractionStarter]: For program point L13-2(lines 13 20) no Hoare annotation was computed. [2019-11-23 22:12:38,766 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-23 22:12:38,766 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-23 22:12:38,766 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-23 22:12:38,767 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-23 22:12:38,767 INFO L447 ceAbstractionStarter]: At program point L22(lines 10 23) the Hoare annotation is: true [2019-11-23 22:12:38,767 INFO L444 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2019-11-23 22:12:38,770 INFO L440 ceAbstractionStarter]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 84) (<= 84 ULTIMATE.start_main_~x~0) (<= 84 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84)) (and (<= ULTIMATE.start_main_~y~0 79) (<= 79 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 70) (<= ULTIMATE.start_main_~x~0 70) (<= 70 ULTIMATE.start_main_~x~0) (<= 70 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 96) (<= 96 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 99) (<= 99 ULTIMATE.start_main_~x~0) (<= 99 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 99)) (and (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) (<= ULTIMATE.start_main_~y~0 62) (<= 62 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 72) (<= 72 ULTIMATE.start_main_~y~0) (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and (<= ULTIMATE.start_main_~x~0 77) (<= 77 ULTIMATE.start_main_~x~0) (<= 77 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 77)) (and (<= 55 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 55) (<= 55 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 55)) (and (<= ULTIMATE.start_main_~x~0 53) (<= ULTIMATE.start_main_~y~0 53) (<= 53 ULTIMATE.start_main_~x~0) (<= 53 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 51) (<= ULTIMATE.start_main_~y~0 51) (<= 51 ULTIMATE.start_main_~y~0) (<= 51 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 91) (<= 91 ULTIMATE.start_main_~x~0) (<= 91 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 91)) (and (<= 61 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 61) (<= 61 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 83) (<= ULTIMATE.start_main_~y~0 83) (<= 83 ULTIMATE.start_main_~x~0) (<= 83 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 60) (<= ULTIMATE.start_main_~y~0 60) (<= 60 ULTIMATE.start_main_~x~0) (<= 60 ULTIMATE.start_main_~y~0)) (and (<= 68 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 68) (<= 68 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 68)) (and (<= ULTIMATE.start_main_~y~0 88) (<= ULTIMATE.start_main_~x~0 88) (<= 88 ULTIMATE.start_main_~x~0) (<= 88 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 56) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) (<= 56 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 58) (<= ULTIMATE.start_main_~x~0 58) (<= 58 ULTIMATE.start_main_~y~0) (<= 58 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 57) (<= ULTIMATE.start_main_~y~0 57) (<= 57 ULTIMATE.start_main_~y~0) (<= 57 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 94) (<= ULTIMATE.start_main_~y~0 94) (<= 94 ULTIMATE.start_main_~x~0) (<= 94 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 81) (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~x~0) (<= 81 ULTIMATE.start_main_~y~0)) (and (<= 76 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= ULTIMATE.start_main_~y~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and (<= 95 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 95) (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~x~0)) (and (<= 64 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 64) (<= ULTIMATE.start_main_~y~0 64) (<= 64 ULTIMATE.start_main_~x~0)) (and (<= 93 ULTIMATE.start_main_~x~0) (<= 93 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 93) (<= ULTIMATE.start_main_~y~0 93)) (and (<= 82 ULTIMATE.start_main_~x~0) (<= 82 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 82) (<= ULTIMATE.start_main_~x~0 82)) (and (<= ULTIMATE.start_main_~x~0 50) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~y~0)) (and (<= 63 ULTIMATE.start_main_~x~0) (<= 63 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 63) (<= ULTIMATE.start_main_~x~0 63)) (and (<= 59 ULTIMATE.start_main_~x~0) (<= 59 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 59) (<= ULTIMATE.start_main_~x~0 59)) (and (<= 73 ULTIMATE.start_main_~x~0) (<= 73 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 73) (<= ULTIMATE.start_main_~x~0 73)) (and (<= ULTIMATE.start_main_~y~0 54) (<= 54 ULTIMATE.start_main_~y~0) (<= 54 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 54)) (and (<= 87 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 87)) (and (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 90) (<= 90 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 85) (<= 85 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 65) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~y~0) (<= 65 ULTIMATE.start_main_~x~0)) (and (<= 100 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 100) (<= 100 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 69) (<= 69 ULTIMATE.start_main_~y~0) (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 69)) (and (<= 86 ULTIMATE.start_main_~x~0) (<= 86 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 86) (<= ULTIMATE.start_main_~y~0 86)) (and (<= ULTIMATE.start_main_~y~0 52) (<= 52 ULTIMATE.start_main_~x~0) (<= 52 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 52)) (and (<= 89 ULTIMATE.start_main_~x~0) (<= 89 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 89) (<= ULTIMATE.start_main_~y~0 89)) (and (<= ULTIMATE.start_main_~x~0 78) (<= 78 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 78)) (and (<= ULTIMATE.start_main_~y~0 75) (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75) (<= 75 ULTIMATE.start_main_~y~0)) (and (<= 80 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 80) (<= 80 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 80)) (and (<= 97 ULTIMATE.start_main_~y~0) (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 97)) (and (<= ULTIMATE.start_main_~y~0 71) (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 71) (<= 71 ULTIMATE.start_main_~y~0)) (and (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 66) (<= ULTIMATE.start_main_~x~0 66) (<= 66 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 92) (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0) (<= 92 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~y~0 98) (<= 98 ULTIMATE.start_main_~y~0) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= 67 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 67)) (and (<= ULTIMATE.start_main_~x~0 74) (<= 74 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 74) (<= 74 ULTIMATE.start_main_~x~0))) [2019-11-23 22:12:38,770 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-23 22:12:38,770 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-11-23 22:12:38,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:12:38 BoogieIcfgContainer [2019-11-23 22:12:38,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:12:38,805 INFO L168 Benchmark]: Toolchain (without parser) took 70864.98 ms. Allocated memory was 138.9 MB in the beginning and 590.3 MB in the end (delta: 451.4 MB). Free memory was 103.2 MB in the beginning and 507.1 MB in the end (delta: -403.9 MB). Peak memory consumption was 461.8 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,806 INFO L168 Benchmark]: CDTParser took 1.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.85 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.90 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,807 INFO L168 Benchmark]: Boogie Preprocessor took 15.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 180.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,807 INFO L168 Benchmark]: RCFGBuilder took 211.37 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 170.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,808 INFO L168 Benchmark]: TraceAbstraction took 70266.62 ms. Allocated memory was 202.9 MB in the beginning and 590.3 MB in the end (delta: 387.4 MB). Free memory was 170.3 MB in the beginning and 507.1 MB in the end (delta: -336.8 MB). Peak memory consumption was 465.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:12:38,810 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.85 ms. Allocated memory is still 138.9 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 109.90 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.9 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 15.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 180.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 211.37 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 170.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 70266.62 ms. Allocated memory was 202.9 MB in the beginning and 590.3 MB in the end (delta: 387.4 MB). Free memory was 170.3 MB in the beginning and 507.1 MB in the end (delta: -336.8 MB). Peak memory consumption was 465.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 84 && 84 <= x) && 84 <= y) && x <= 84) || (((y <= 79 && 79 <= y) && x <= 79) && 79 <= x)) || (((y <= 70 && x <= 70) && 70 <= x) && 70 <= y)) || (((y <= 96 && 96 <= y) && x <= 96) && 96 <= x)) || (((y <= 99 && 99 <= x) && 99 <= y) && x <= 99)) || (((62 <= x && x <= 62) && y <= 62) && 62 <= y)) || (((y <= 72 && 72 <= y) && 72 <= x) && x <= 72)) || (((x <= 77 && 77 <= x) && 77 <= y) && y <= 77)) || (((55 <= x && y <= 55) && 55 <= y) && x <= 55)) || (((x <= 53 && y <= 53) && 53 <= x) && 53 <= y)) || (((x <= 51 && y <= 51) && 51 <= y) && 51 <= x)) || (((y <= 91 && 91 <= x) && 91 <= y) && x <= 91)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((x <= 83 && y <= 83) && 83 <= x) && 83 <= y)) || (((x <= 60 && y <= 60) && 60 <= x) && 60 <= y)) || (((68 <= y && x <= 68) && 68 <= x) && y <= 68)) || (((y <= 88 && x <= 88) && 88 <= x) && 88 <= y)) || (((y <= 56 && 56 <= x) && x <= 56) && 56 <= y)) || (((y <= 58 && x <= 58) && 58 <= y) && 58 <= x)) || (((x <= 57 && y <= 57) && 57 <= y) && 57 <= x)) || (((x <= 94 && y <= 94) && 94 <= x) && 94 <= y)) || (((y <= 81 && x <= 81) && 81 <= x) && 81 <= y)) || (((76 <= y && x <= 76) && y <= 76) && 76 <= x)) || (((95 <= y && y <= 95) && x <= 95) && 95 <= x)) || (((64 <= y && x <= 64) && y <= 64) && 64 <= x)) || (((93 <= x && 93 <= y) && x <= 93) && y <= 93)) || (((82 <= x && 82 <= y) && y <= 82) && x <= 82)) || ((x <= 50 && y <= 50) && 50 <= y)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((73 <= x && 73 <= y) && y <= 73) && x <= 73)) || (((y <= 54 && 54 <= y) && 54 <= x) && x <= 54)) || (((87 <= y && x <= 87) && 87 <= x) && y <= 87)) || (((x <= 90 && 90 <= x) && y <= 90) && 90 <= y)) || (((y <= 85 && 85 <= y) && x <= 85) && 85 <= x)) || (((y <= 65 && x <= 65) && 65 <= y) && 65 <= x)) || ((100 <= y && y <= 100) && 100 <= x)) || (((y <= 69 && 69 <= y) && 69 <= x) && x <= 69)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((y <= 52 && 52 <= x) && 52 <= y) && x <= 52)) || (((89 <= x && 89 <= y) && x <= 89) && y <= 89)) || (((x <= 78 && 78 <= y) && 78 <= x) && y <= 78)) || (((y <= 75 && 75 <= x) && x <= 75) && 75 <= y)) || (((80 <= y && x <= 80) && 80 <= x) && y <= 80)) || (((97 <= y && 97 <= x) && x <= 97) && y <= 97)) || (((y <= 71 && 71 <= x) && x <= 71) && 71 <= y)) || (((66 <= x && y <= 66) && x <= 66) && 66 <= y)) || (((y <= 92 && x <= 92) && 92 <= x) && 92 <= y)) || (((y <= 98 && 98 <= y) && 98 <= x) && x <= 98)) || (((67 <= x && x <= 67) && 67 <= y) && y <= 67)) || (((x <= 74 && 74 <= y) && y <= 74) && 74 <= x) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 70.1s, OverallIterations: 31, TraceHistogramMax: 101, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, HoareTripleCheckerStatistics: 272 SDtfs, 1521 SDslu, 8196 SDs, 0 SdLazy, 7407 SolverSat, 1834 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4417 GetRequests, 2923 SyntacticMatches, 1 SemanticMatches, 1493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 2665 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 660 HoareAnnotationTreeSize, 3 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 250 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 45.2s InterpolantComputationTime, 6153 NumberOfCodeBlocks, 5949 NumberOfCodeBlocksAsserted, 671 NumberOfCheckSat, 6094 ConstructedInterpolants, 0 QuantifiedInterpolants, 2917096 SizeOfPredicates, 20 NumberOfNonLiveVariables, 6612 ConjunctsInSsa, 1162 ConjunctsInUnsatCore, 59 InterpolantComputations, 4 PerfectInterpolantSequences, 42798/223681 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...