/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:43:40,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:43:40,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:43:40,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:43:40,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:43:40,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:43:40,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:43:40,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:43:40,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:43:40,773 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:43:40,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:43:40,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:43:40,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:43:40,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:43:40,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:43:40,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:43:40,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:43:40,775 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:43:40,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:43:40,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:43:40,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:43:40,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:43:40,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:43:40,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:43:40,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:43:40,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:43:40,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:43:40,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:43:40,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:43:40,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:43:40,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:43:41,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:43:41,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:43:41,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:43:41,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:43:41,247 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:43:41,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_08.i [2020-12-21 21:43:41,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1ae226a/513aefc7ba914092a14bdb8c596b419a/FLAGfd746e9cf [2020-12-21 21:43:42,007 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:43:42,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i [2020-12-21 21:43:42,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1ae226a/513aefc7ba914092a14bdb8c596b419a/FLAGfd746e9cf [2020-12-21 21:43:42,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a1ae226a/513aefc7ba914092a14bdb8c596b419a [2020-12-21 21:43:42,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:43:42,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:43:42,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:43:42,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:43:42,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:43:42,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cfc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42, skipping insertion in model container [2020-12-21 21:43:42,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:43:42,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:43:42,562 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2020-12-21 21:43:42,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:43:42,596 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:43:42,615 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2020-12-21 21:43:42,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:43:42,664 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:43:42,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42 WrapperNode [2020-12-21 21:43:42,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:43:42,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:43:42,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:43:42,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:43:42,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:43:42,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:43:42,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:43:42,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:43:42,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... [2020-12-21 21:43:42,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:43:42,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:43:42,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:43:42,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:43:42,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:43:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:43:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:43:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:43:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:43:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:43:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:43:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:43:43,355 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:43:43,355 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:43:43,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:43:43 BoogieIcfgContainer [2020-12-21 21:43:43,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:43:43,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:43:43,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:43:43,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:43:43,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:43:42" (1/3) ... [2020-12-21 21:43:43,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2976863f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:43:43, skipping insertion in model container [2020-12-21 21:43:43,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:43:42" (2/3) ... [2020-12-21 21:43:43,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2976863f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:43:43, skipping insertion in model container [2020-12-21 21:43:43,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:43:43" (3/3) ... [2020-12-21 21:43:43,381 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2020-12-21 21:43:43,390 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:43:43,397 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:43:43,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:43:43,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:43:43,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:43:43,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:43:43,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:43:43,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:43:43,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:43:43,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:43:43,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:43:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-21 21:43:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:43:43,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:43,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:43,523 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2020-12-21 21:43:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:43,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216617541] [2020-12-21 21:43:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:43:43,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216617541] [2020-12-21 21:43:43,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:43:43,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:43:43,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450024816] [2020-12-21 21:43:43,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:43:43,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:43:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:43:43,761 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-21 21:43:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:43,820 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-12-21 21:43:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:43:43,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:43:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:43,833 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:43:43,833 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 21:43:43,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:43:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 21:43:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 21:43:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 21:43:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-21 21:43:43,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-21 21:43:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:43,877 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-21 21:43:43,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:43:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-21 21:43:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:43:43,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:43,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:43,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:43:43,879 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:43,880 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2020-12-21 21:43:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:43,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779989760] [2020-12-21 21:43:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:43:43,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779989760] [2020-12-21 21:43:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948188102] [2020-12-21 21:43:43,938 INFO L95 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 [2020-12-21 21:43:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:44,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:43:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:43:44,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:43:44,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2020-12-21 21:43:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439809617] [2020-12-21 21:43:44,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:43:44,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:43:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:43:44,040 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-21 21:43:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:44,066 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-21 21:43:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:43:44,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:43:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:44,067 INFO L225 Difference]: With dead ends: 24 [2020-12-21 21:43:44,067 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 21:43:44,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:43:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 21:43:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-12-21 21:43:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 21:43:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-21 21:43:44,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-21 21:43:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:44,073 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-21 21:43:44,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:43:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-21 21:43:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:43:44,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:44,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:44,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:43:44,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2020-12-21 21:43:44,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:44,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739911047] [2020-12-21 21:43:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:43:44,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739911047] [2020-12-21 21:43:44,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157790525] [2020-12-21 21:43:44,356 INFO L95 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 [2020-12-21 21:43:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:43:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:43:44,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:44,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:43:44,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717018259] [2020-12-21 21:43:44,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:43:44,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:43:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:43:44,485 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2020-12-21 21:43:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:44,520 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-21 21:43:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:43:44,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-21 21:43:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:44,522 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:43:44,522 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 21:43:44,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:43:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 21:43:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2020-12-21 21:43:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 21:43:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-21 21:43:44,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-12-21 21:43:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:44,528 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-21 21:43:44,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:43:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-21 21:43:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:43:44,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:44,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:44,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:44,745 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash -519784366, now seen corresponding path program 2 times [2020-12-21 21:43:44,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:44,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661639795] [2020-12-21 21:43:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:43:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661639795] [2020-12-21 21:43:44,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474688702] [2020-12-21 21:43:44,855 INFO L93 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 [2020-12-21 21:43:44,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:43:44,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:44,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:43:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:43:45,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:45,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:43:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114012297] [2020-12-21 21:43:45,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:43:45,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:43:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:43:45,056 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2020-12-21 21:43:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:45,152 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2020-12-21 21:43:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:43:45,153 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-21 21:43:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:45,154 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:43:45,154 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:43:45,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:43:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:43:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2020-12-21 21:43:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:43:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-21 21:43:45,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-12-21 21:43:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:45,161 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-21 21:43:45,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:43:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-21 21:43:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:43:45,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:45,163 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:45,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:45,377 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:45,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 3 times [2020-12-21 21:43:45,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:45,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785715946] [2020-12-21 21:43:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:43:45,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785715946] [2020-12-21 21:43:45,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720164347] [2020-12-21 21:43:45,456 INFO L93 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:43:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:43:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:43:45,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:45,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:43:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985375239] [2020-12-21 21:43:45,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:43:45,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:45,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:43:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:43:45,560 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-12-21 21:43:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:45,609 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-21 21:43:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:43:45,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-21 21:43:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:45,610 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:43:45,611 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 21:43:45,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:43:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 21:43:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-21 21:43:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 21:43:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-21 21:43:45,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-12-21 21:43:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:45,617 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-21 21:43:45,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:43:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-21 21:43:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:43:45,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:45,618 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:45,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:45,832 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash -696235598, now seen corresponding path program 4 times [2020-12-21 21:43:45,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:45,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702213027] [2020-12-21 21:43:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:43:45,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702213027] [2020-12-21 21:43:45,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539665431] [2020-12-21 21:43:45,919 INFO L93 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:45,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:43:45,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:43:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:43:46,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:46,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-12-21 21:43:46,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144492105] [2020-12-21 21:43:46,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:43:46,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:43:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:43:46,096 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 11 states. [2020-12-21 21:43:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:46,195 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-21 21:43:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:43:46,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-21 21:43:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:46,202 INFO L225 Difference]: With dead ends: 54 [2020-12-21 21:43:46,202 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:43:46,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:43:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:43:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2020-12-21 21:43:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:43:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-21 21:43:46,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-12-21 21:43:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:46,213 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-21 21:43:46,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:43:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-21 21:43:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:43:46,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:46,214 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:46,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:43:46,415 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1003861208, now seen corresponding path program 5 times [2020-12-21 21:43:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:46,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708418690] [2020-12-21 21:43:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:43:46,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708418690] [2020-12-21 21:43:46,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307559893] [2020-12-21 21:43:46,522 INFO L93 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 [2020-12-21 21:43:46,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:43:46,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:43:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:43:46,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:46,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2020-12-21 21:43:46,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568019499] [2020-12-21 21:43:46,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:43:46,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:43:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:43:46,797 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2020-12-21 21:43:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:46,897 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-12-21 21:43:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:43:46,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-21 21:43:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:46,899 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:43:46,899 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:43:46,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:43:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:43:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2020-12-21 21:43:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:43:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-21 21:43:46,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-12-21 21:43:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:46,907 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-21 21:43:46,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:43:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-21 21:43:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:43:46,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:46,908 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:47,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:47,122 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash -676746537, now seen corresponding path program 6 times [2020-12-21 21:43:47,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:47,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542525022] [2020-12-21 21:43:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:43:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542525022] [2020-12-21 21:43:47,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674993873] [2020-12-21 21:43:47,223 INFO L93 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 [2020-12-21 21:43:47,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:43:47,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:47,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:43:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:43:47,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:47,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:43:47,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904760424] [2020-12-21 21:43:47,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:43:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:43:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:43:47,644 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-12-21 21:43:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:47,754 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-21 21:43:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:43:47,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-21 21:43:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:47,756 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:43:47,756 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:43:47,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:43:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:43:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 30. [2020-12-21 21:43:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:43:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-21 21:43:47,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-12-21 21:43:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-21 21:43:47,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:43:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-21 21:43:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:43:47,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:47,766 INFO L422 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:47,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:47,981 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash 547139987, now seen corresponding path program 7 times [2020-12-21 21:43:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:47,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841285113] [2020-12-21 21:43:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:43:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841285113] [2020-12-21 21:43:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938163567] [2020-12-21 21:43:48,086 INFO L93 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 [2020-12-21 21:43:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:43:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:43:48,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:48,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 22 [2020-12-21 21:43:48,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302600893] [2020-12-21 21:43:48,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:43:48,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:43:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:43:48,360 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 22 states. [2020-12-21 21:43:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:48,485 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-12-21 21:43:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:43:48,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-21 21:43:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:48,486 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:43:48,486 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:43:48,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:43:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:43:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 37. [2020-12-21 21:43:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:43:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-21 21:43:48,495 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-12-21 21:43:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:48,495 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-21 21:43:48,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:43:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-21 21:43:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:43:48,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:48,496 INFO L422 BasicCegarLoop]: trace histogram [19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:48,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:43:48,710 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1365801079, now seen corresponding path program 8 times [2020-12-21 21:43:48,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:48,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007368742] [2020-12-21 21:43:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-21 21:43:48,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007368742] [2020-12-21 21:43:48,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456374236] [2020-12-21 21:43:48,902 INFO L93 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 [2020-12-21 21:43:48,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:43:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:43:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:43:49,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:49,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 28 [2020-12-21 21:43:49,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858638637] [2020-12-21 21:43:49,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:43:49,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:49,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:43:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:43:49,284 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 28 states. [2020-12-21 21:43:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:49,448 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-12-21 21:43:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:43:49,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2020-12-21 21:43:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:49,455 INFO L225 Difference]: With dead ends: 99 [2020-12-21 21:43:49,455 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:43:49,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:43:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:43:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2020-12-21 21:43:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:43:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-21 21:43:49,477 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-12-21 21:43:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:49,477 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-21 21:43:49,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:43:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-21 21:43:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:43:49,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:49,479 INFO L422 BasicCegarLoop]: trace histogram [25, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:49,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:49,696 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash -838959661, now seen corresponding path program 9 times [2020-12-21 21:43:49,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:49,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510528495] [2020-12-21 21:43:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-21 21:43:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510528495] [2020-12-21 21:43:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268050318] [2020-12-21 21:43:49,893 INFO L93 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 [2020-12-21 21:43:50,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:43:50,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:43:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-21 21:43:50,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:50,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:43:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382417753] [2020-12-21 21:43:50,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:43:50,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:43:50,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:43:50,272 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-12-21 21:43:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:50,370 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-12-21 21:43:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:43:50,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-12-21 21:43:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:50,372 INFO L225 Difference]: With dead ends: 96 [2020-12-21 21:43:50,372 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:43:50,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:43:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:43:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2020-12-21 21:43:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:43:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-21 21:43:50,382 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-12-21 21:43:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:50,383 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-21 21:43:50,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:43:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-21 21:43:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:43:50,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:50,386 INFO L422 BasicCegarLoop]: trace histogram [25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:50,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:43:50,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash -186499561, now seen corresponding path program 10 times [2020-12-21 21:43:50,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:50,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229703096] [2020-12-21 21:43:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-21 21:43:50,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229703096] [2020-12-21 21:43:50,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100516224] [2020-12-21 21:43:50,779 INFO L93 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 [2020-12-21 21:43:50,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:43:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:43:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:43:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:43:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:43:51,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:43:51,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28] total 35 [2020-12-21 21:43:51,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354782539] [2020-12-21 21:43:51,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:43:51,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:43:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:43:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:43:51,210 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 35 states. [2020-12-21 21:43:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:43:51,394 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-12-21 21:43:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:43:51,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-12-21 21:43:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:43:51,395 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:43:51,396 INFO L226 Difference]: Without dead ends: 103 [2020-12-21 21:43:51,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=594, Invalid=596, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:43:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-21 21:43:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 53. [2020-12-21 21:43:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:43:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-21 21:43:51,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 43 [2020-12-21 21:43:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:43:51,404 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-21 21:43:51,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:43:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-21 21:43:51,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:43:51,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:43:51,406 INFO L422 BasicCegarLoop]: trace histogram [32, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:43:51,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:43:51,621 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:43:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:43:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1335836904, now seen corresponding path program 11 times [2020-12-21 21:43:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:43:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356719688] [2020-12-21 21:43:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:43:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:43:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-21 21:43:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356719688] [2020-12-21 21:43:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588149707] [2020-12-21 21:43:51,780 INFO L93 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 [2020-12-21 21:45:38,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:45:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:45:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:45:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 21:45:39,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:39,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 35] total 43 [2020-12-21 21:45:39,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359329120] [2020-12-21 21:45:39,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:45:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:45:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=902, Invalid=904, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:45:39,270 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 43 states. [2020-12-21 21:45:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:39,498 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-12-21 21:45:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:45:39,499 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-12-21 21:45:39,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:39,500 INFO L225 Difference]: With dead ends: 135 [2020-12-21 21:45:39,500 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 21:45:39,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=904, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:45:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 21:45:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 62. [2020-12-21 21:45:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:45:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-21 21:45:39,509 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2020-12-21 21:45:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:39,510 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-21 21:45:39,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:45:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-21 21:45:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:45:39,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:39,512 INFO L422 BasicCegarLoop]: trace histogram [40, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:39,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:45:39,714 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1244198926, now seen corresponding path program 12 times [2020-12-21 21:45:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425654891] [2020-12-21 21:45:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-12-21 21:45:39,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425654891] [2020-12-21 21:45:39,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122760743] [2020-12-21 21:45:39,996 INFO L93 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 [2020-12-21 21:45:48,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:45:48,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:45:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:45:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-12-21 21:45:48,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:48,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:45:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649119186] [2020-12-21 21:45:48,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:45:48,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:45:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:45:48,290 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 15 states. [2020-12-21 21:45:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:48,410 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-12-21 21:45:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:45:48,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-12-21 21:45:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:48,412 INFO L225 Difference]: With dead ends: 129 [2020-12-21 21:45:48,412 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 21:45:48,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:45:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 21:45:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 63. [2020-12-21 21:45:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:45:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-21 21:45:48,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-12-21 21:45:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:48,421 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-21 21:45:48,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:45:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-21 21:45:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:45:48,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:48,422 INFO L422 BasicCegarLoop]: trace histogram [40, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:48,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:45:48,623 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 135985112, now seen corresponding path program 13 times [2020-12-21 21:45:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:48,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65220293] [2020-12-21 21:45:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-12-21 21:45:48,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65220293] [2020-12-21 21:45:48,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371199782] [2020-12-21 21:45:48,804 INFO L93 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 [2020-12-21 21:45:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:45:48,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:45:49,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:49,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 43] total 52 [2020-12-21 21:45:49,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543979685] [2020-12-21 21:45:49,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:45:49,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:45:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=1327, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:45:49,447 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 52 states. [2020-12-21 21:45:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:49,740 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2020-12-21 21:45:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:45:49,740 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-12-21 21:45:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:49,742 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:45:49,742 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:45:49,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1325, Invalid=1327, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:45:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:45:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2020-12-21 21:45:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:45:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-21 21:45:49,763 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 61 [2020-12-21 21:45:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:49,763 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-21 21:45:49,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:45:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-21 21:45:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:45:49,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:49,765 INFO L422 BasicCegarLoop]: trace histogram [49, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:49,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:45:49,966 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1086887319, now seen corresponding path program 14 times [2020-12-21 21:45:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:49,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112153690] [2020-12-21 21:45:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-12-21 21:45:50,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112153690] [2020-12-21 21:45:50,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319747738] [2020-12-21 21:45:50,192 INFO L93 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 [2020-12-21 21:45:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:45:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:45:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:45:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:45:50,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:50,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 52] total 60 [2020-12-21 21:45:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865984698] [2020-12-21 21:45:50,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 21:45:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 21:45:50,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1769, Invalid=1771, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:45:50,988 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 60 states. [2020-12-21 21:45:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:51,330 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2020-12-21 21:45:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-21 21:45:51,331 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 71 [2020-12-21 21:45:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:51,332 INFO L225 Difference]: With dead ends: 173 [2020-12-21 21:45:51,332 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:45:51,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1769, Invalid=1771, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 21:45:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:45:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-12-21 21:45:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:45:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-21 21:45:51,342 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 71 [2020-12-21 21:45:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:51,342 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-21 21:45:51,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 21:45:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-21 21:45:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:45:51,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:51,343 INFO L422 BasicCegarLoop]: trace histogram [57, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:51,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:45:51,557 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:51,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1956626771, now seen corresponding path program 15 times [2020-12-21 21:45:51,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:51,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888592501] [2020-12-21 21:45:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2020-12-21 21:45:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888592501] [2020-12-21 21:45:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082011615] [2020-12-21 21:45:51,815 INFO L93 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 [2020-12-21 21:45:54,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:45:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:45:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:45:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2020-12-21 21:45:54,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:54,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:45:54,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610323391] [2020-12-21 21:45:54,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:45:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:45:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:45:54,566 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 18 states. [2020-12-21 21:45:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:54,701 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2020-12-21 21:45:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:45:54,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-21 21:45:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:54,703 INFO L225 Difference]: With dead ends: 164 [2020-12-21 21:45:54,703 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 21:45:54,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:45:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 21:45:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 83. [2020-12-21 21:45:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:45:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-12-21 21:45:54,710 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-12-21 21:45:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:54,711 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-12-21 21:45:54,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:45:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-12-21 21:45:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:45:54,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:54,712 INFO L422 BasicCegarLoop]: trace histogram [57, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:54,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:45:54,927 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash 577333911, now seen corresponding path program 16 times [2020-12-21 21:45:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905968057] [2020-12-21 21:45:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2020-12-21 21:45:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905968057] [2020-12-21 21:45:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827860757] [2020-12-21 21:45:55,222 INFO L93 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 [2020-12-21 21:45:55,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:45:55,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:45:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-21 21:45:55,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:45:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:45:56,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:45:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 60] total 69 [2020-12-21 21:45:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538822185] [2020-12-21 21:45:56,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-21 21:45:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:45:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-21 21:45:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2345, Invalid=2347, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 21:45:56,108 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 69 states. [2020-12-21 21:45:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:45:56,537 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2020-12-21 21:45:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-21 21:45:56,538 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 81 [2020-12-21 21:45:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:45:56,539 INFO L225 Difference]: With dead ends: 196 [2020-12-21 21:45:56,539 INFO L226 Difference]: Without dead ends: 173 [2020-12-21 21:45:56,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2345, Invalid=2347, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 21:45:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-21 21:45:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-12-21 21:45:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 21:45:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-12-21 21:45:56,548 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 81 [2020-12-21 21:45:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:45:56,549 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-12-21 21:45:56,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-21 21:45:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-12-21 21:45:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:45:56,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:45:56,550 INFO L422 BasicCegarLoop]: trace histogram [66, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:45:56,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:45:56,765 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:45:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:45:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash 129242680, now seen corresponding path program 17 times [2020-12-21 21:45:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:45:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622482742] [2020-12-21 21:45:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:45:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:45:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2347 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-21 21:45:57,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622482742] [2020-12-21 21:45:57,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124754431] [2020-12-21 21:45:57,116 INFO L93 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