/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/float-benchs/zonotope_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:42:32,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:42:32,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:42:32,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:42:32,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:42:32,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:42:32,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:42:32,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:42:32,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:42:32,187 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:42:32,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:42:32,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:42:32,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:42:32,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:42:32,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:42:32,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:42:32,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:42:32,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:42:32,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:42:32,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:42:32,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:42:32,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:42:32,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:42:32,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:42:32,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:42:32,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:42:32,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:42:32,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:42:32,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:42:32,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:42:32,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:42:32,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:42:32,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:42:32,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:42:32,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:42:32,626 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:42:32,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c [2020-12-22 03:42:32,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc79a12d/2a87489ddedd48aba2432a534b45a2ff/FLAGad9d8d219 [2020-12-22 03:42:33,481 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:42:33,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c [2020-12-22 03:42:33,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc79a12d/2a87489ddedd48aba2432a534b45a2ff/FLAGad9d8d219 [2020-12-22 03:42:33,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc79a12d/2a87489ddedd48aba2432a534b45a2ff [2020-12-22 03:42:33,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:42:33,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:42:33,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:33,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:42:33,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:42:33,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:33" (1/1) ... [2020-12-22 03:42:33,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f0073c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:33, skipping insertion in model container [2020-12-22 03:42:33,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:33" (1/1) ... [2020-12-22 03:42:33,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:42:33,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:42:34,042 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/float-benchs/zonotope_3.c[604,617] [2020-12-22 03:42:34,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:34,083 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:42:34,100 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/float-benchs/zonotope_3.c[604,617] [2020-12-22 03:42:34,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:34,138 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:42:34,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34 WrapperNode [2020-12-22 03:42:34,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:34,143 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:34,143 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:42:34,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:42:34,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:34,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:42:34,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:42:34,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:42:34,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (1/1) ... [2020-12-22 03:42:34,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:42:34,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:42:34,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:42:34,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:42:34,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (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 [2020-12-22 03:42:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:42:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:42:34,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:42:34,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:42:34,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:42:34,921 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 03:42:34,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:34 BoogieIcfgContainer [2020-12-22 03:42:34,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:42:34,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:42:34,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:42:34,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:42:34,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:42:33" (1/3) ... [2020-12-22 03:42:34,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46286a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:34, skipping insertion in model container [2020-12-22 03:42:34,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:34" (2/3) ... [2020-12-22 03:42:34,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46286a40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:34, skipping insertion in model container [2020-12-22 03:42:34,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:34" (3/3) ... [2020-12-22 03:42:34,949 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2020-12-22 03:42:34,985 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:42:35,002 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:42:35,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:42:35,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:42:35,084 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:42:35,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:42:35,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:42:35,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:42:35,085 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:42:35,085 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:42:35,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:42:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 03:42:35,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:42:35,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:35,113 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1466747552, now seen corresponding path program 1 times [2020-12-22 03:42:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:35,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525913832] [2020-12-22 03:42:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525913832] [2020-12-22 03:42:35,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:35,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:42:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182684965] [2020-12-22 03:42:35,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:42:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:42:35,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:35,353 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-22 03:42:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:35,398 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-22 03:42:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:42:35,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 03:42:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:35,411 INFO L225 Difference]: With dead ends: 46 [2020-12-22 03:42:35,411 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 03:42:35,415 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 [2020-12-22 03:42:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 03:42:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-12-22 03:42:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:42:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 03:42:35,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-12-22 03:42:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:35,461 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 03:42:35,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:42:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 03:42:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 03:42:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:35,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:42:35,463 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:35,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938571, now seen corresponding path program 1 times [2020-12-22 03:42:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:35,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129808526] [2020-12-22 03:42:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129808526] [2020-12-22 03:42:35,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733062144] [2020-12-22 03:42:35,545 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 [2020-12-22 03:42:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:42:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:35,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:42:35,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472009477] [2020-12-22 03:42:35,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:42:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:42:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:35,717 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-22 03:42:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:35,748 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 03:42:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:42:35,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-22 03:42:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:35,750 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:42:35,750 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 03:42:35,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 03:42:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-12-22 03:42:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 03:42:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 03:42:35,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-12-22 03:42:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 03:42:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:42:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 03:42:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 03:42:35,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:35,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:35,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 03:42:35,978 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 294705462, now seen corresponding path program 2 times [2020-12-22 03:42:35,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:35,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595424570] [2020-12-22 03:42:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595424570] [2020-12-22 03:42:36,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816932259] [2020-12-22 03:42:36,134 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 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 [2020-12-22 03:42:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:42:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:36,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:42:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571403724] [2020-12-22 03:42:36,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:42:36,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:42:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:36,329 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2020-12-22 03:42:36,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:36,389 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 03:42:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:42:36,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-22 03:42:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:36,392 INFO L225 Difference]: With dead ends: 46 [2020-12-22 03:42:36,392 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 03:42:36,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 03:42:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-12-22 03:42:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 03:42:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 03:42:36,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 26 [2020-12-22 03:42:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:36,413 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 03:42:36,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:42:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 03:42:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 03:42:36,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:36,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:36,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:36,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -529808735, now seen corresponding path program 3 times [2020-12-22 03:42:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013620670] [2020-12-22 03:42:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013620670] [2020-12-22 03:42:36,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398864401] [2020-12-22 03:42:36,775 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 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 [2020-12-22 03:42:36,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 03:42:36,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:36,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:42:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:36,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:42:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760184481] [2020-12-22 03:42:36,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:42:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:42:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:36,936 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 7 states. [2020-12-22 03:42:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:36,990 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 03:42:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:42:36,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-22 03:42:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:36,992 INFO L225 Difference]: With dead ends: 54 [2020-12-22 03:42:36,993 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 03:42:36,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 03:42:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-12-22 03:42:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 03:42:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 03:42:37,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 34 [2020-12-22 03:42:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:37,002 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 03:42:37,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:42:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 03:42:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 03:42:37,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:37,004 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:37,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:37,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1994920204, now seen corresponding path program 4 times [2020-12-22 03:42:37,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:37,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767586866] [2020-12-22 03:42:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767586866] [2020-12-22 03:42:37,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402556651] [2020-12-22 03:42:37,336 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 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 [2020-12-22 03:42:37,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:42:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:42:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523275619] [2020-12-22 03:42:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:42:37,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:42:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:37,520 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 8 states. [2020-12-22 03:42:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:37,560 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 03:42:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:42:37,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-22 03:42:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:37,563 INFO L225 Difference]: With dead ends: 62 [2020-12-22 03:42:37,563 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 03:42:37,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 03:42:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-22 03:42:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 03:42:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 03:42:37,572 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 42 [2020-12-22 03:42:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:37,573 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 03:42:37,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:42:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 03:42:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 03:42:37,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:37,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:37,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:37,791 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1546599305, now seen corresponding path program 5 times [2020-12-22 03:42:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:37,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118607633] [2020-12-22 03:42:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118607633] [2020-12-22 03:42:37,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371473325] [2020-12-22 03:42:37,920 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 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 [2020-12-22 03:42:38,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 03:42:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:38,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:42:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:38,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:42:38,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496190542] [2020-12-22 03:42:38,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:42:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:42:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:38,151 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 9 states. [2020-12-22 03:42:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:38,208 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 03:42:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:42:38,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-12-22 03:42:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:38,216 INFO L225 Difference]: With dead ends: 70 [2020-12-22 03:42:38,217 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 03:42:38,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 03:42:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-12-22 03:42:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 03:42:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 03:42:38,240 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 50 [2020-12-22 03:42:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:38,240 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 03:42:38,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:42:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 03:42:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 03:42:38,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:38,246 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:38,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 03:42:38,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash 988863714, now seen corresponding path program 6 times [2020-12-22 03:42:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:38,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304170121] [2020-12-22 03:42:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304170121] [2020-12-22 03:42:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524019343] [2020-12-22 03:42:38,583 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 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 [2020-12-22 03:42:38,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:42:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:42:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:38,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:42:38,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333049870] [2020-12-22 03:42:38,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:42:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:42:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:38,809 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 10 states. [2020-12-22 03:42:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:38,855 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 03:42:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:42:38,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-12-22 03:42:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:38,857 INFO L225 Difference]: With dead ends: 78 [2020-12-22 03:42:38,857 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 03:42:38,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 03:42:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-12-22 03:42:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 03:42:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 03:42:38,865 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 58 [2020-12-22 03:42:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:38,866 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 03:42:38,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:42:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 03:42:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 03:42:38,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:38,868 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:39,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:39,083 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 353589837, now seen corresponding path program 7 times [2020-12-22 03:42:39,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:39,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200434508] [2020-12-22 03:42:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200434508] [2020-12-22 03:42:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343613811] [2020-12-22 03:42:39,228 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 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 [2020-12-22 03:42:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:42:39,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:39,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:42:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274049876] [2020-12-22 03:42:39,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:42:39,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:42:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:39,414 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 11 states. [2020-12-22 03:42:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:39,457 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 03:42:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:42:39,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-12-22 03:42:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:39,459 INFO L225 Difference]: With dead ends: 86 [2020-12-22 03:42:39,459 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 03:42:39,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 03:42:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-12-22 03:42:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 03:42:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-22 03:42:39,466 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 66 [2020-12-22 03:42:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:39,467 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-22 03:42:39,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:42:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-22 03:42:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 03:42:39,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:39,468 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:39,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:39,675 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:39,676 INFO L82 PathProgramCache]: Analyzing trace with hash 268647608, now seen corresponding path program 8 times [2020-12-22 03:42:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:39,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382712921] [2020-12-22 03:42:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:39,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382712921] [2020-12-22 03:42:39,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577527460] [2020-12-22 03:42:39,868 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 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 [2020-12-22 03:42:39,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:39,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:42:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:40,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:42:40,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125979909] [2020-12-22 03:42:40,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:42:40,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:42:40,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:40,110 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 12 states. [2020-12-22 03:42:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:40,155 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-22 03:42:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:42:40,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-12-22 03:42:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:40,157 INFO L225 Difference]: With dead ends: 94 [2020-12-22 03:42:40,157 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 03:42:40,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 03:42:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-12-22 03:42:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 03:42:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-22 03:42:40,165 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 74 [2020-12-22 03:42:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:40,166 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-22 03:42:40,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:42:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-22 03:42:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 03:42:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:40,167 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:40,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 03:42:40,381 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:40,382 INFO L82 PathProgramCache]: Analyzing trace with hash 244024355, now seen corresponding path program 9 times [2020-12-22 03:42:40,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800678525] [2020-12-22 03:42:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800678525] [2020-12-22 03:42:40,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224817670] [2020-12-22 03:42:40,581 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 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 [2020-12-22 03:42:40,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 03:42:40,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:42:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:40,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:42:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839221989] [2020-12-22 03:42:40,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:42:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:42:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:40,810 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 13 states. [2020-12-22 03:42:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:40,862 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-22 03:42:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:42:40,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-12-22 03:42:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:40,863 INFO L225 Difference]: With dead ends: 102 [2020-12-22 03:42:40,863 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 03:42:40,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 03:42:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-12-22 03:42:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 03:42:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-22 03:42:40,871 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 82 [2020-12-22 03:42:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:40,872 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-22 03:42:40,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:42:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-22 03:42:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 03:42:40,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:40,874 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:41,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:41,089 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash -126406514, now seen corresponding path program 10 times [2020-12-22 03:42:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:41,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558102657] [2020-12-22 03:42:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558102657] [2020-12-22 03:42:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520881410] [2020-12-22 03:42:41,329 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 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 [2020-12-22 03:42:41,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:42:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:41,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:42:41,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954691284] [2020-12-22 03:42:41,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:42:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:42:41,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:41,575 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 14 states. [2020-12-22 03:42:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:41,636 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-22 03:42:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:42:41,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-12-22 03:42:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:41,637 INFO L225 Difference]: With dead ends: 110 [2020-12-22 03:42:41,637 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 03:42:41,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 03:42:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-12-22 03:42:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 03:42:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-22 03:42:41,645 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 90 [2020-12-22 03:42:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:41,645 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-22 03:42:41,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:42:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-22 03:42:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 03:42:41,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:41,646 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:41,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:41,862 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:41,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1164885511, now seen corresponding path program 11 times [2020-12-22 03:42:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:41,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455355733] [2020-12-22 03:42:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455355733] [2020-12-22 03:42:42,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845463539] [2020-12-22 03:42:42,070 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 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 [2020-12-22 03:42:42,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 03:42:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:42:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:42,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:42:42,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171036102] [2020-12-22 03:42:42,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:42:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:42:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:42,366 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 15 states. [2020-12-22 03:42:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:42,434 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-22 03:42:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:42:42,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-12-22 03:42:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:42,436 INFO L225 Difference]: With dead ends: 118 [2020-12-22 03:42:42,436 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 03:42:42,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 03:42:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-12-22 03:42:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 03:42:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-22 03:42:42,444 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 98 [2020-12-22 03:42:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:42,445 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-22 03:42:42,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:42:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-22 03:42:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 03:42:42,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:42,447 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:42,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 03:42:42,660 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1185200228, now seen corresponding path program 12 times [2020-12-22 03:42:42,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:42,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854304974] [2020-12-22 03:42:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854304974] [2020-12-22 03:42:42,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51590211] [2020-12-22 03:42:42,864 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 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 [2020-12-22 03:42:43,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 03:42:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:42:43,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:43,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:42:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719318170] [2020-12-22 03:42:43,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:42:43,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:42:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:43,158 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 16 states. [2020-12-22 03:42:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:43,232 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-22 03:42:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:42:43,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-12-22 03:42:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:43,234 INFO L225 Difference]: With dead ends: 126 [2020-12-22 03:42:43,234 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 03:42:43,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 03:42:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2020-12-22 03:42:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 03:42:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-22 03:42:43,242 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 106 [2020-12-22 03:42:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:43,242 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-22 03:42:43,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:42:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-22 03:42:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 03:42:43,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:43,244 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:43,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:42:43,458 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1820552241, now seen corresponding path program 13 times [2020-12-22 03:42:43,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:43,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800791791] [2020-12-22 03:42:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800791791] [2020-12-22 03:42:43,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026776832] [2020-12-22 03:42:43,725 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 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 [2020-12-22 03:42:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:42:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:44,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:42:44,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868490127] [2020-12-22 03:42:44,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:42:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:42:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:44,020 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 17 states. [2020-12-22 03:42:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:44,099 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-22 03:42:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:42:44,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-12-22 03:42:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:44,100 INFO L225 Difference]: With dead ends: 134 [2020-12-22 03:42:44,101 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 03:42:44,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 03:42:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2020-12-22 03:42:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 03:42:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-22 03:42:44,107 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 114 [2020-12-22 03:42:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:44,107 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-22 03:42:44,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:42:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-22 03:42:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 03:42:44,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:44,109 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:44,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:42:44,323 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1662790598, now seen corresponding path program 14 times [2020-12-22 03:42:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:44,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920575226] [2020-12-22 03:42:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920575226] [2020-12-22 03:42:44,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240045825] [2020-12-22 03:42:44,577 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 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 [2020-12-22 03:42:44,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:42:44,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:44,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:44,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:42:44,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343563155] [2020-12-22 03:42:44,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:42:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:42:44,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:44,878 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 18 states. [2020-12-22 03:42:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:44,960 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-22 03:42:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:42:44,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 122 [2020-12-22 03:42:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:44,962 INFO L225 Difference]: With dead ends: 142 [2020-12-22 03:42:44,962 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 03:42:44,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 03:42:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-12-22 03:42:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 03:42:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-22 03:42:44,969 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 122 [2020-12-22 03:42:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:44,969 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-22 03:42:44,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:42:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-22 03:42:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 03:42:44,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:44,971 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:45,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:45,186 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:45,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1671788965, now seen corresponding path program 15 times [2020-12-22 03:42:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:45,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377758361] [2020-12-22 03:42:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377758361] [2020-12-22 03:42:45,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872574520] [2020-12-22 03:42:45,518 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 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 [2020-12-22 03:42:45,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 03:42:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:45,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:42:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:45,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:42:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613248033] [2020-12-22 03:42:45,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:42:45,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:45,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:42:45,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:45,963 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 19 states. [2020-12-22 03:42:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:46,041 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-22 03:42:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:42:46,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2020-12-22 03:42:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:46,043 INFO L225 Difference]: With dead ends: 150 [2020-12-22 03:42:46,043 INFO L226 Difference]: Without dead ends: 146 [2020-12-22 03:42:46,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-22 03:42:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-12-22 03:42:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 03:42:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-22 03:42:46,051 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 130 [2020-12-22 03:42:46,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:46,051 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-22 03:42:46,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:42:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-22 03:42:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 03:42:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:46,054 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:46,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 03:42:46,268 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash -309558256, now seen corresponding path program 16 times [2020-12-22 03:42:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:46,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634727497] [2020-12-22 03:42:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634727497] [2020-12-22 03:42:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997521521] [2020-12-22 03:42:46,603 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 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 [2020-12-22 03:42:46,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:42:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:46,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:42:46,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619199645] [2020-12-22 03:42:46,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:42:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:42:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:46,959 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 20 states. [2020-12-22 03:42:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:47,039 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-22 03:42:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:42:47,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2020-12-22 03:42:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:47,041 INFO L225 Difference]: With dead ends: 158 [2020-12-22 03:42:47,041 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 03:42:47,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 03:42:47,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-12-22 03:42:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 03:42:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-22 03:42:47,050 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 138 [2020-12-22 03:42:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:47,051 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-22 03:42:47,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:42:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-22 03:42:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 03:42:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:47,053 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:47,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:42:47,268 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1164178299, now seen corresponding path program 17 times [2020-12-22 03:42:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197052709] [2020-12-22 03:42:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197052709] [2020-12-22 03:42:47,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565990667] [2020-12-22 03:42:47,570 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 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 [2020-12-22 03:42:47,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 03:42:47,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:42:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:47,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:42:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694761911] [2020-12-22 03:42:47,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:42:47,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:42:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:47,972 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 21 states. [2020-12-22 03:42:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:48,051 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-22 03:42:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:42:48,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-12-22 03:42:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:48,053 INFO L225 Difference]: With dead ends: 166 [2020-12-22 03:42:48,053 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 03:42:48,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 03:42:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2020-12-22 03:42:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 03:42:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-22 03:42:48,059 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 146 [2020-12-22 03:42:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:48,060 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-22 03:42:48,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:42:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-22 03:42:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 03:42:48,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:48,062 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:48,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:42:48,276 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2062993382, now seen corresponding path program 18 times [2020-12-22 03:42:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:48,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2167147] [2020-12-22 03:42:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:48,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2167147] [2020-12-22 03:42:48,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360523249] [2020-12-22 03:42:48,595 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 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 [2020-12-22 03:42:48,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 03:42:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:42:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:49,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:49,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:42:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130816590] [2020-12-22 03:42:49,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:42:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:42:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:49,010 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 22 states. [2020-12-22 03:42:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:49,099 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-22 03:42:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:42:49,100 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-12-22 03:42:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:49,101 INFO L225 Difference]: With dead ends: 174 [2020-12-22 03:42:49,101 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 03:42:49,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 03:42:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2020-12-22 03:42:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 03:42:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-22 03:42:49,107 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 154 [2020-12-22 03:42:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:49,108 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-22 03:42:49,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:42:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-22 03:42:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 03:42:49,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:49,110 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:49,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:49,325 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1559232175, now seen corresponding path program 19 times [2020-12-22 03:42:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:49,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918707073] [2020-12-22 03:42:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:49,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918707073] [2020-12-22 03:42:49,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622981146] [2020-12-22 03:42:49,683 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:42:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:50,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:42:50,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966300968] [2020-12-22 03:42:50,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:42:50,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:42:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:50,072 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 23 states. [2020-12-22 03:42:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:50,171 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-22 03:42:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:42:50,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 162 [2020-12-22 03:42:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:50,172 INFO L225 Difference]: With dead ends: 182 [2020-12-22 03:42:50,172 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 03:42:50,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 03:42:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2020-12-22 03:42:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 03:42:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-22 03:42:50,179 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 162 [2020-12-22 03:42:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:50,179 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-22 03:42:50,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:42:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-22 03:42:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 03:42:50,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:50,182 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:50,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:50,393 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash -679829572, now seen corresponding path program 20 times [2020-12-22 03:42:50,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:50,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123443666] [2020-12-22 03:42:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123443666] [2020-12-22 03:42:50,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974082963] [2020-12-22 03:42:50,790 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:51,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:51,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:42:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:51,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:51,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 03:42:51,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644061599] [2020-12-22 03:42:51,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:42:51,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:51,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:42:51,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:51,268 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 24 states. [2020-12-22 03:42:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:51,363 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-22 03:42:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:42:51,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-12-22 03:42:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:51,365 INFO L225 Difference]: With dead ends: 190 [2020-12-22 03:42:51,365 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 03:42:51,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 03:42:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2020-12-22 03:42:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 03:42:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-22 03:42:51,372 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 170 [2020-12-22 03:42:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:51,373 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-22 03:42:51,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:42:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-22 03:42:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 03:42:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:51,375 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:51,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 03:42:51,589 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 922854183, now seen corresponding path program 21 times [2020-12-22 03:42:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:51,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244627466] [2020-12-22 03:42:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244627466] [2020-12-22 03:42:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968282109] [2020-12-22 03:42:52,031 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:52,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 03:42:52,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 03:42:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:52,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:52,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 03:42:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695120489] [2020-12-22 03:42:52,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:42:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:42:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:52,491 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 25 states. [2020-12-22 03:42:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:52,584 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-12-22 03:42:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 03:42:52,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 178 [2020-12-22 03:42:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:52,586 INFO L225 Difference]: With dead ends: 198 [2020-12-22 03:42:52,587 INFO L226 Difference]: Without dead ends: 194 [2020-12-22 03:42:52,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-22 03:42:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-12-22 03:42:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 03:42:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-22 03:42:52,593 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 178 [2020-12-22 03:42:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:52,594 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-22 03:42:52,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:42:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-22 03:42:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 03:42:52,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:52,596 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:52,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 03:42:52,812 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -445641838, now seen corresponding path program 22 times [2020-12-22 03:42:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:52,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134114168] [2020-12-22 03:42:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134114168] [2020-12-22 03:42:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971436999] [2020-12-22 03:42:53,292 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:53,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 03:42:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:53,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 03:42:53,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304830529] [2020-12-22 03:42:53,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 03:42:53,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 03:42:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:53,722 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 26 states. [2020-12-22 03:42:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:53,808 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-12-22 03:42:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 03:42:53,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-12-22 03:42:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:53,810 INFO L225 Difference]: With dead ends: 206 [2020-12-22 03:42:53,811 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 03:42:53,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 03:42:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2020-12-22 03:42:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 03:42:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-12-22 03:42:53,818 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 186 [2020-12-22 03:42:53,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:53,818 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-12-22 03:42:53,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 03:42:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-12-22 03:42:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 03:42:53,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:53,821 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:54,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:54,034 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:54,035 INFO L82 PathProgramCache]: Analyzing trace with hash 194042109, now seen corresponding path program 23 times [2020-12-22 03:42:54,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:54,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865216812] [2020-12-22 03:42:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:54,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865216812] [2020-12-22 03:42:54,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385759017] [2020-12-22 03:42:54,530 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:54,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 03:42:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 03:42:54,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:55,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 03:42:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423797206] [2020-12-22 03:42:55,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 03:42:55,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:55,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 03:42:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:55,018 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 27 states. [2020-12-22 03:42:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:55,131 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2020-12-22 03:42:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 03:42:55,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 194 [2020-12-22 03:42:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:55,134 INFO L225 Difference]: With dead ends: 214 [2020-12-22 03:42:55,134 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 03:42:55,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 03:42:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2020-12-22 03:42:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-22 03:42:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-12-22 03:42:55,142 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 194 [2020-12-22 03:42:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:55,142 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-12-22 03:42:55,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 03:42:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-12-22 03:42:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 03:42:55,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:55,145 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:55,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 03:42:55,359 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -684782744, now seen corresponding path program 24 times [2020-12-22 03:42:55,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:55,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976647054] [2020-12-22 03:42:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:55,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976647054] [2020-12-22 03:42:55,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066935044] [2020-12-22 03:42:55,923 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:56,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 03:42:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:42:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:56,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:56,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 03:42:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317246985] [2020-12-22 03:42:56,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:42:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:56,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:42:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:56,493 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 28 states. [2020-12-22 03:42:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:56,623 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2020-12-22 03:42:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:42:56,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 202 [2020-12-22 03:42:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:56,625 INFO L225 Difference]: With dead ends: 222 [2020-12-22 03:42:56,625 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 03:42:56,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 03:42:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2020-12-22 03:42:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-22 03:42:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2020-12-22 03:42:56,633 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 202 [2020-12-22 03:42:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:56,634 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2020-12-22 03:42:56,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:42:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2020-12-22 03:42:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 03:42:56,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:56,636 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:56,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:56,852 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2065015507, now seen corresponding path program 25 times [2020-12-22 03:42:56,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:56,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110657667] [2020-12-22 03:42:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110657667] [2020-12-22 03:42:57,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179308340] [2020-12-22 03:42:57,374 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 03:42:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:57,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 03:42:57,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160258497] [2020-12-22 03:42:57,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 03:42:57,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 03:42:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:57,822 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 29 states. [2020-12-22 03:42:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:57,957 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2020-12-22 03:42:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:42:57,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 210 [2020-12-22 03:42:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:57,959 INFO L225 Difference]: With dead ends: 230 [2020-12-22 03:42:57,959 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 03:42:57,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 03:42:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2020-12-22 03:42:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 03:42:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2020-12-22 03:42:57,967 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 210 [2020-12-22 03:42:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:57,968 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2020-12-22 03:42:57,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 03:42:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2020-12-22 03:42:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-22 03:42:57,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:57,970 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:58,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 03:42:58,185 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash 789552958, now seen corresponding path program 26 times [2020-12-22 03:42:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:58,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928194338] [2020-12-22 03:42:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928194338] [2020-12-22 03:42:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144021016] [2020-12-22 03:42:58,811 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:59,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 03:42:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:59,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:59,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 03:42:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991644316] [2020-12-22 03:42:59,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:42:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:42:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:59,322 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 30 states. [2020-12-22 03:42:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:59,440 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-12-22 03:42:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:42:59,440 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 218 [2020-12-22 03:42:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:59,442 INFO L225 Difference]: With dead ends: 238 [2020-12-22 03:42:59,442 INFO L226 Difference]: Without dead ends: 234 [2020-12-22 03:42:59,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-22 03:42:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2020-12-22 03:42:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-22 03:42:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-12-22 03:42:59,451 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 218 [2020-12-22 03:42:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:59,452 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-12-22 03:42:59,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:42:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-12-22 03:42:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 03:42:59,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:59,454 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:59,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 03:42:59,669 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 803733673, now seen corresponding path program 27 times [2020-12-22 03:42:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:59,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331576731] [2020-12-22 03:42:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:00,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331576731] [2020-12-22 03:43:00,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274663643] [2020-12-22 03:43:00,269 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:00,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 03:43:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 03:43:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:00,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:00,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 03:43:00,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277954118] [2020-12-22 03:43:00,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 03:43:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:00,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 03:43:00,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:43:00,824 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 31 states. [2020-12-22 03:43:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:00,965 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-12-22 03:43:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 03:43:00,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2020-12-22 03:43:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:00,967 INFO L225 Difference]: With dead ends: 246 [2020-12-22 03:43:00,967 INFO L226 Difference]: Without dead ends: 242 [2020-12-22 03:43:00,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:43:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-22 03:43:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2020-12-22 03:43:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-22 03:43:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2020-12-22 03:43:00,974 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 226 [2020-12-22 03:43:00,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:00,975 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2020-12-22 03:43:00,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 03:43:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2020-12-22 03:43:00,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 03:43:00,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:00,977 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:01,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 03:43:01,193 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1083586796, now seen corresponding path program 28 times [2020-12-22 03:43:01,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:01,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418071901] [2020-12-22 03:43:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418071901] [2020-12-22 03:43:01,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57028613] [2020-12-22 03:43:01,991 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:02,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:43:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:02,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:02,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 03:43:02,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803697379] [2020-12-22 03:43:02,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 03:43:02,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:02,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 03:43:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:43:02,552 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 32 states. [2020-12-22 03:43:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:02,708 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2020-12-22 03:43:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 03:43:02,708 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 234 [2020-12-22 03:43:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:02,710 INFO L225 Difference]: With dead ends: 254 [2020-12-22 03:43:02,710 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 03:43:02,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:43:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 03:43:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2020-12-22 03:43:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 03:43:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-12-22 03:43:02,722 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 234 [2020-12-22 03:43:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:02,723 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-12-22 03:43:02,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 03:43:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-12-22 03:43:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 03:43:02,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:02,725 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:02,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 03:43:02,939 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 610267775, now seen corresponding path program 29 times [2020-12-22 03:43:02,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:02,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696585847] [2020-12-22 03:43:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696585847] [2020-12-22 03:43:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536510689] [2020-12-22 03:43:03,639 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:03,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 03:43:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:43:03,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:04,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:04,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 03:43:04,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176525158] [2020-12-22 03:43:04,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 03:43:04,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 03:43:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:43:04,220 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 33 states. [2020-12-22 03:43:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:04,397 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2020-12-22 03:43:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 03:43:04,398 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 242 [2020-12-22 03:43:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:04,399 INFO L225 Difference]: With dead ends: 262 [2020-12-22 03:43:04,400 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 03:43:04,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:43:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 03:43:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2020-12-22 03:43:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-22 03:43:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2020-12-22 03:43:04,418 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 242 [2020-12-22 03:43:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:04,418 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2020-12-22 03:43:04,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 03:43:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2020-12-22 03:43:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 03:43:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:04,420 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:04,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:04,634 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1433042198, now seen corresponding path program 30 times [2020-12-22 03:43:04,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:04,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599498449] [2020-12-22 03:43:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599498449] [2020-12-22 03:43:05,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323053673] [2020-12-22 03:43:05,389 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:05,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 03:43:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:43:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:06,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:06,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 03:43:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738195828] [2020-12-22 03:43:06,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 03:43:06,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 03:43:06,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:43:06,057 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 34 states. [2020-12-22 03:43:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:06,198 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2020-12-22 03:43:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 03:43:06,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 250 [2020-12-22 03:43:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:06,200 INFO L225 Difference]: With dead ends: 270 [2020-12-22 03:43:06,200 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 03:43:06,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:43:06,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 03:43:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-12-22 03:43:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 03:43:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2020-12-22 03:43:06,210 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 250 [2020-12-22 03:43:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:06,210 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2020-12-22 03:43:06,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 03:43:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2020-12-22 03:43:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 03:43:06,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:06,212 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:06,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:06,424 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1563068331, now seen corresponding path program 31 times [2020-12-22 03:43:06,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:06,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490877507] [2020-12-22 03:43:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:07,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490877507] [2020-12-22 03:43:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089150211] [2020-12-22 03:43:07,292 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 03:43:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:07,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:07,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 03:43:07,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749440948] [2020-12-22 03:43:07,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 03:43:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 03:43:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:43:07,879 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 35 states. [2020-12-22 03:43:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:08,043 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-12-22 03:43:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 03:43:08,044 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 258 [2020-12-22 03:43:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:08,046 INFO L225 Difference]: With dead ends: 278 [2020-12-22 03:43:08,046 INFO L226 Difference]: Without dead ends: 274 [2020-12-22 03:43:08,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:43:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-22 03:43:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2020-12-22 03:43:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 03:43:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-12-22 03:43:08,061 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 258 [2020-12-22 03:43:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:08,062 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-12-22 03:43:08,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 03:43:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-12-22 03:43:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-22 03:43:08,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:08,065 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:08,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:08,279 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1659556544, now seen corresponding path program 32 times [2020-12-22 03:43:08,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:08,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671470777] [2020-12-22 03:43:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671470777] [2020-12-22 03:43:09,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888284954] [2020-12-22 03:43:09,154 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:09,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:43:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:09,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 03:43:09,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721134181] [2020-12-22 03:43:09,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 03:43:09,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:09,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 03:43:09,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:43:09,780 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 36 states. [2020-12-22 03:43:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:09,924 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-12-22 03:43:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 03:43:09,924 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 266 [2020-12-22 03:43:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:09,926 INFO L225 Difference]: With dead ends: 286 [2020-12-22 03:43:09,926 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 03:43:09,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:43:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 03:43:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2020-12-22 03:43:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-22 03:43:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2020-12-22 03:43:09,934 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 266 [2020-12-22 03:43:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:09,935 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2020-12-22 03:43:09,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 03:43:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2020-12-22 03:43:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-22 03:43:09,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:09,937 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:10,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 03:43:10,152 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1168151083, now seen corresponding path program 33 times [2020-12-22 03:43:10,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:10,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819121085] [2020-12-22 03:43:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:11,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819121085] [2020-12-22 03:43:11,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603126687] [2020-12-22 03:43:11,103 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:11,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 03:43:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:43:11,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:11,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:11,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 03:43:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362221929] [2020-12-22 03:43:11,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 03:43:11,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 03:43:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:43:11,809 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 37 states. [2020-12-22 03:43:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:11,981 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2020-12-22 03:43:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 03:43:11,982 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 274 [2020-12-22 03:43:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:11,984 INFO L225 Difference]: With dead ends: 294 [2020-12-22 03:43:11,985 INFO L226 Difference]: Without dead ends: 290 [2020-12-22 03:43:11,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:43:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-22 03:43:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 283. [2020-12-22 03:43:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-22 03:43:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-12-22 03:43:11,994 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 274 [2020-12-22 03:43:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:11,995 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-12-22 03:43:11,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 03:43:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-12-22 03:43:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-22 03:43:11,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:11,997 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:12,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:12,211 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1430145386, now seen corresponding path program 34 times [2020-12-22 03:43:12,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:12,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675078068] [2020-12-22 03:43:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675078068] [2020-12-22 03:43:13,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244547879] [2020-12-22 03:43:13,082 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:13,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 03:43:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:13,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:13,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 03:43:13,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403267489] [2020-12-22 03:43:13,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 03:43:13,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 03:43:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:43:13,703 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 38 states. [2020-12-22 03:43:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:13,849 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2020-12-22 03:43:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:43:13,850 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 282 [2020-12-22 03:43:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:13,855 INFO L225 Difference]: With dead ends: 302 [2020-12-22 03:43:13,855 INFO L226 Difference]: Without dead ends: 298 [2020-12-22 03:43:13,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:43:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-22 03:43:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2020-12-22 03:43:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-22 03:43:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2020-12-22 03:43:13,865 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 282 [2020-12-22 03:43:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:13,866 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2020-12-22 03:43:13,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 03:43:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2020-12-22 03:43:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-22 03:43:13,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:13,868 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:14,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 03:43:14,080 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -149340159, now seen corresponding path program 35 times [2020-12-22 03:43:14,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:14,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971368627] [2020-12-22 03:43:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:15,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971368627] [2020-12-22 03:43:15,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831958069] [2020-12-22 03:43:15,018 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:15,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 03:43:15,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 03:43:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:15,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:15,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 03:43:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219727054] [2020-12-22 03:43:15,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 03:43:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 03:43:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:43:15,749 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 39 states. [2020-12-22 03:43:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:15,952 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2020-12-22 03:43:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 03:43:15,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 290 [2020-12-22 03:43:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:15,955 INFO L225 Difference]: With dead ends: 310 [2020-12-22 03:43:15,955 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 03:43:15,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:43:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 03:43:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-12-22 03:43:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-22 03:43:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2020-12-22 03:43:15,965 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 290 [2020-12-22 03:43:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:15,966 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2020-12-22 03:43:15,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 03:43:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2020-12-22 03:43:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-22 03:43:15,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:15,968 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:16,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:16,183 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1804456340, now seen corresponding path program 36 times [2020-12-22 03:43:16,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:16,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704653053] [2020-12-22 03:43:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704653053] [2020-12-22 03:43:17,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644698020] [2020-12-22 03:43:17,235 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:17,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 03:43:17,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 03:43:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:18,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:18,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 03:43:18,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711465247] [2020-12-22 03:43:18,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 03:43:18,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 03:43:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:43:18,044 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 40 states. [2020-12-22 03:43:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:18,255 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-12-22 03:43:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 03:43:18,255 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 298 [2020-12-22 03:43:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:18,258 INFO L225 Difference]: With dead ends: 318 [2020-12-22 03:43:18,258 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 03:43:18,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:43:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 03:43:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2020-12-22 03:43:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 03:43:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-12-22 03:43:18,268 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 298 [2020-12-22 03:43:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:18,269 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-12-22 03:43:18,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 03:43:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-12-22 03:43:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-22 03:43:18,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:18,272 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:18,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 03:43:18,484 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -241729065, now seen corresponding path program 37 times [2020-12-22 03:43:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:18,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152964913] [2020-12-22 03:43:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:19,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152964913] [2020-12-22 03:43:19,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544576765] [2020-12-22 03:43:19,569 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:19,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:43:19,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:20,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:20,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 03:43:20,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526288632] [2020-12-22 03:43:20,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 03:43:20,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 03:43:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:43:20,253 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 41 states. [2020-12-22 03:43:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:20,468 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-12-22 03:43:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 03:43:20,469 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 306 [2020-12-22 03:43:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:20,471 INFO L225 Difference]: With dead ends: 326 [2020-12-22 03:43:20,471 INFO L226 Difference]: Without dead ends: 322 [2020-12-22 03:43:20,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:43:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-22 03:43:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2020-12-22 03:43:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-22 03:43:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2020-12-22 03:43:20,482 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 306 [2020-12-22 03:43:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:20,483 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2020-12-22 03:43:20,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 03:43:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2020-12-22 03:43:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-22 03:43:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:20,485 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:20,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 03:43:20,699 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2108409278, now seen corresponding path program 38 times [2020-12-22 03:43:20,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:20,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517936163] [2020-12-22 03:43:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517936163] [2020-12-22 03:43:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502941689] [2020-12-22 03:43:21,917 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:22,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:43:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:22,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:22,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 03:43:22,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993093471] [2020-12-22 03:43:22,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 03:43:22,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:22,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 03:43:22,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:43:22,720 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 42 states. [2020-12-22 03:43:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:22,954 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2020-12-22 03:43:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:43:22,955 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 314 [2020-12-22 03:43:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:22,957 INFO L225 Difference]: With dead ends: 334 [2020-12-22 03:43:22,957 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 03:43:22,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:43:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 03:43:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2020-12-22 03:43:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-12-22 03:43:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-12-22 03:43:22,968 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 314 [2020-12-22 03:43:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:22,968 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-12-22 03:43:22,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 03:43:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-12-22 03:43:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-22 03:43:22,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:22,970 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:23,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 03:43:23,180 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1082959955, now seen corresponding path program 39 times [2020-12-22 03:43:23,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:23,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9722367] [2020-12-22 03:43:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:24,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9722367] [2020-12-22 03:43:24,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961659028] [2020-12-22 03:43:24,350 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:24,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 03:43:24,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 03:43:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:25,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:25,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 03:43:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250395291] [2020-12-22 03:43:25,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 03:43:25,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 03:43:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:43:25,153 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 43 states. [2020-12-22 03:43:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:25,382 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2020-12-22 03:43:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 03:43:25,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 322 [2020-12-22 03:43:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:25,385 INFO L225 Difference]: With dead ends: 342 [2020-12-22 03:43:25,385 INFO L226 Difference]: Without dead ends: 338 [2020-12-22 03:43:25,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:43:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-22 03:43:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 331. [2020-12-22 03:43:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-22 03:43:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2020-12-22 03:43:25,395 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 322 [2020-12-22 03:43:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:25,396 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2020-12-22 03:43:25,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 03:43:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2020-12-22 03:43:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-22 03:43:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:25,398 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:25,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 03:43:25,611 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:25,612 INFO L82 PathProgramCache]: Analyzing trace with hash 650107416, now seen corresponding path program 40 times [2020-12-22 03:43:25,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:25,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131493530] [2020-12-22 03:43:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131493530] [2020-12-22 03:43:26,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152517547] [2020-12-22 03:43:26,907 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:27,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:27,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 03:43:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:27,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:27,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 03:43:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011645708] [2020-12-22 03:43:27,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 03:43:27,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:27,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 03:43:27,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:43:27,691 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 44 states. [2020-12-22 03:43:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:27,910 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2020-12-22 03:43:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 03:43:27,911 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 330 [2020-12-22 03:43:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:27,912 INFO L225 Difference]: With dead ends: 350 [2020-12-22 03:43:27,912 INFO L226 Difference]: Without dead ends: 346 [2020-12-22 03:43:27,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:43:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-22 03:43:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2020-12-22 03:43:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-22 03:43:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2020-12-22 03:43:27,922 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 330 [2020-12-22 03:43:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:27,923 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2020-12-22 03:43:27,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 03:43:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2020-12-22 03:43:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-22 03:43:27,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:27,925 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:28,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:28,140 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash 990167427, now seen corresponding path program 41 times [2020-12-22 03:43:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:28,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650660229] [2020-12-22 03:43:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:29,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650660229] [2020-12-22 03:43:29,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935288566] [2020-12-22 03:43:29,453 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:29,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 03:43:29,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 03:43:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:30,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:30,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 03:43:30,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493392770] [2020-12-22 03:43:30,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 03:43:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 03:43:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:43:30,332 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 45 states. [2020-12-22 03:43:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:30,541 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2020-12-22 03:43:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 03:43:30,541 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 338 [2020-12-22 03:43:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:30,543 INFO L225 Difference]: With dead ends: 358 [2020-12-22 03:43:30,544 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 03:43:30,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:43:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 03:43:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2020-12-22 03:43:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-22 03:43:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2020-12-22 03:43:30,554 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 338 [2020-12-22 03:43:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:30,555 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2020-12-22 03:43:30,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 03:43:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2020-12-22 03:43:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-22 03:43:30,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:30,557 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:30,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 03:43:30,770 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2079519250, now seen corresponding path program 42 times [2020-12-22 03:43:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:30,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652508258] [2020-12-22 03:43:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652508258] [2020-12-22 03:43:32,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820658947] [2020-12-22 03:43:32,239 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:32,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 03:43:32,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 03:43:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:33,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:33,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 03:43:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926718750] [2020-12-22 03:43:33,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 03:43:33,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 03:43:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:43:33,125 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 46 states. [2020-12-22 03:43:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:33,345 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2020-12-22 03:43:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 03:43:33,345 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 346 [2020-12-22 03:43:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:33,348 INFO L225 Difference]: With dead ends: 366 [2020-12-22 03:43:33,348 INFO L226 Difference]: Without dead ends: 362 [2020-12-22 03:43:33,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:43:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-12-22 03:43:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2020-12-22 03:43:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-22 03:43:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2020-12-22 03:43:33,373 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 346 [2020-12-22 03:43:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:33,375 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2020-12-22 03:43:33,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 03:43:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2020-12-22 03:43:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-12-22 03:43:33,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:33,378 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:33,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:33,592 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1901871271, now seen corresponding path program 43 times [2020-12-22 03:43:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:33,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562500312] [2020-12-22 03:43:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:35,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562500312] [2020-12-22 03:43:35,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660856335] [2020-12-22 03:43:35,062 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 03:43:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:35,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:35,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 03:43:35,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609883583] [2020-12-22 03:43:35,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 03:43:35,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 03:43:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:43:35,878 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 47 states. [2020-12-22 03:43:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:36,110 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2020-12-22 03:43:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 03:43:36,110 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 354 [2020-12-22 03:43:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:36,112 INFO L225 Difference]: With dead ends: 374 [2020-12-22 03:43:36,112 INFO L226 Difference]: Without dead ends: 370 [2020-12-22 03:43:36,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:43:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-22 03:43:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2020-12-22 03:43:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-22 03:43:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2020-12-22 03:43:36,122 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 354 [2020-12-22 03:43:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:36,122 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2020-12-22 03:43:36,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 03:43:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2020-12-22 03:43:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-12-22 03:43:36,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:36,125 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:36,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:36,338 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash -325855804, now seen corresponding path program 44 times [2020-12-22 03:43:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:36,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579119317] [2020-12-22 03:43:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:37,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579119317] [2020-12-22 03:43:37,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468981023] [2020-12-22 03:43:37,891 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:38,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:38,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 03:43:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:38,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:38,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 03:43:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440060020] [2020-12-22 03:43:38,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 03:43:38,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 03:43:38,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:43:38,750 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 48 states. [2020-12-22 03:43:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:38,986 INFO L93 Difference]: Finished difference Result 382 states and 382 transitions. [2020-12-22 03:43:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 03:43:38,987 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 362 [2020-12-22 03:43:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:38,989 INFO L225 Difference]: With dead ends: 382 [2020-12-22 03:43:38,989 INFO L226 Difference]: Without dead ends: 378 [2020-12-22 03:43:38,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:43:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-12-22 03:43:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2020-12-22 03:43:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-22 03:43:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2020-12-22 03:43:38,998 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 362 [2020-12-22 03:43:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:38,999 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2020-12-22 03:43:38,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 03:43:38,999 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2020-12-22 03:43:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-12-22 03:43:39,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:39,001 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:39,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 03:43:39,215 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 883446063, now seen corresponding path program 45 times [2020-12-22 03:43:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:39,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997007020] [2020-12-22 03:43:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:40,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997007020] [2020-12-22 03:43:40,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505150614] [2020-12-22 03:43:40,863 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:41,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 03:43:41,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:41,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 03:43:41,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:41,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:41,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 03:43:41,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606912408] [2020-12-22 03:43:41,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 03:43:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:41,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 03:43:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:41,893 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 49 states. [2020-12-22 03:43:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:42,128 INFO L93 Difference]: Finished difference Result 390 states and 390 transitions. [2020-12-22 03:43:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 03:43:42,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 370 [2020-12-22 03:43:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:42,130 INFO L225 Difference]: With dead ends: 390 [2020-12-22 03:43:42,131 INFO L226 Difference]: Without dead ends: 386 [2020-12-22 03:43:42,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-22 03:43:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 379. [2020-12-22 03:43:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-12-22 03:43:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2020-12-22 03:43:42,141 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 370 [2020-12-22 03:43:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:42,141 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2020-12-22 03:43:42,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 03:43:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2020-12-22 03:43:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-12-22 03:43:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:42,144 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:42,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 03:43:42,359 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 44839322, now seen corresponding path program 46 times [2020-12-22 03:43:42,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:42,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973565154] [2020-12-22 03:43:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973565154] [2020-12-22 03:43:43,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582735409] [2020-12-22 03:43:43,993 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:44,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:44,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 03:43:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:44,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:44,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 03:43:44,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996846730] [2020-12-22 03:43:44,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 03:43:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:44,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 03:43:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:44,884 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 50 states. [2020-12-22 03:43:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:45,151 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2020-12-22 03:43:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 03:43:45,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 378 [2020-12-22 03:43:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:45,153 INFO L225 Difference]: With dead ends: 398 [2020-12-22 03:43:45,153 INFO L226 Difference]: Without dead ends: 394 [2020-12-22 03:43:45,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-22 03:43:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 387. [2020-12-22 03:43:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-22 03:43:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2020-12-22 03:43:45,163 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 378 [2020-12-22 03:43:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:45,163 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2020-12-22 03:43:45,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 03:43:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2020-12-22 03:43:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-12-22 03:43:45,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:45,166 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:45,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 03:43:45,380 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -144017659, now seen corresponding path program 47 times [2020-12-22 03:43:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:45,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994780520] [2020-12-22 03:43:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:47,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994780520] [2020-12-22 03:43:47,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627676386] [2020-12-22 03:43:47,146 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:47,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 03:43:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:43:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:48,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:48,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 03:43:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102052797] [2020-12-22 03:43:48,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 03:43:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 03:43:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:48,197 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 51 states. [2020-12-22 03:43:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:48,501 INFO L93 Difference]: Finished difference Result 406 states and 406 transitions. [2020-12-22 03:43:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 03:43:48,501 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 386 [2020-12-22 03:43:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:48,503 INFO L225 Difference]: With dead ends: 406 [2020-12-22 03:43:48,503 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 03:43:48,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 03:43:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2020-12-22 03:43:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 03:43:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2020-12-22 03:43:48,512 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 386 [2020-12-22 03:43:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:48,513 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2020-12-22 03:43:48,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 03:43:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2020-12-22 03:43:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-12-22 03:43:48,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:48,516 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:48,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:48,732 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1196547728, now seen corresponding path program 48 times [2020-12-22 03:43:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:48,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903732661] [2020-12-22 03:43:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903732661] [2020-12-22 03:43:50,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075545525] [2020-12-22 03:43:50,562 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:51,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 03:43:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 03:43:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:51,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:51,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 03:43:51,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766925481] [2020-12-22 03:43:51,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 03:43:51,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 03:43:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:51,673 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 52 states. [2020-12-22 03:43:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:51,924 INFO L93 Difference]: Finished difference Result 414 states and 414 transitions. [2020-12-22 03:43:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 03:43:51,925 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 394 [2020-12-22 03:43:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:51,926 INFO L225 Difference]: With dead ends: 414 [2020-12-22 03:43:51,927 INFO L226 Difference]: Without dead ends: 410 [2020-12-22 03:43:51,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-22 03:43:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 403. [2020-12-22 03:43:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-22 03:43:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2020-12-22 03:43:51,936 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 394 [2020-12-22 03:43:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:51,937 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2020-12-22 03:43:51,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 03:43:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2020-12-22 03:43:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-12-22 03:43:51,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:51,940 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:52,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 03:43:52,154 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash -247320357, now seen corresponding path program 49 times [2020-12-22 03:43:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:52,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043453631] [2020-12-22 03:43:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:54,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043453631] [2020-12-22 03:43:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595992265] [2020-12-22 03:43:54,040 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 03:43:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:54,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:54,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 03:43:54,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826895549] [2020-12-22 03:43:54,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 03:43:54,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 03:43:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:54,996 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 53 states. [2020-12-22 03:43:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:55,288 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2020-12-22 03:43:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 03:43:55,288 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 402 [2020-12-22 03:43:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:55,290 INFO L225 Difference]: With dead ends: 422 [2020-12-22 03:43:55,290 INFO L226 Difference]: Without dead ends: 418 [2020-12-22 03:43:55,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-22 03:43:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2020-12-22 03:43:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-22 03:43:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2020-12-22 03:43:55,299 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 402 [2020-12-22 03:43:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:55,299 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2020-12-22 03:43:55,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 03:43:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2020-12-22 03:43:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-12-22 03:43:55,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:55,302 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:55,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 03:43:55,516 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1358013766, now seen corresponding path program 50 times [2020-12-22 03:43:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:55,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630315722] [2020-12-22 03:43:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:57,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630315722] [2020-12-22 03:43:57,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155464181] [2020-12-22 03:43:57,435 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:57,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:57,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 03:43:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:58,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:58,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 03:43:58,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503920920] [2020-12-22 03:43:58,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 03:43:58,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:58,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 03:43:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:58,433 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 54 states. [2020-12-22 03:43:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:58,712 INFO L93 Difference]: Finished difference Result 430 states and 430 transitions. [2020-12-22 03:43:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 03:43:58,712 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 410 [2020-12-22 03:43:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:58,714 INFO L225 Difference]: With dead ends: 430 [2020-12-22 03:43:58,714 INFO L226 Difference]: Without dead ends: 426 [2020-12-22 03:43:58,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-22 03:43:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2020-12-22 03:43:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-12-22 03:43:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2020-12-22 03:43:58,724 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 410 [2020-12-22 03:43:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:58,724 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2020-12-22 03:43:58,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 03:43:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2020-12-22 03:43:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-12-22 03:43:58,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:58,728 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:58,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:58,941 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:58,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1937277263, now seen corresponding path program 51 times [2020-12-22 03:43:58,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:58,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020395618] [2020-12-22 03:43:58,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:01,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020395618] [2020-12-22 03:44:01,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108166142] [2020-12-22 03:44:01,041 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:01,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 03:44:01,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:44:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:02,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:02,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 03:44:02,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002309331] [2020-12-22 03:44:02,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 03:44:02,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 03:44:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:44:02,229 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 55 states. [2020-12-22 03:44:02,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:02,510 INFO L93 Difference]: Finished difference Result 438 states and 438 transitions. [2020-12-22 03:44:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 03:44:02,512 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 418 [2020-12-22 03:44:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:02,515 INFO L225 Difference]: With dead ends: 438 [2020-12-22 03:44:02,515 INFO L226 Difference]: Without dead ends: 434 [2020-12-22 03:44:02,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:44:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-22 03:44:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2020-12-22 03:44:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-22 03:44:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2020-12-22 03:44:02,525 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 418 [2020-12-22 03:44:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:02,526 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2020-12-22 03:44:02,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 03:44:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2020-12-22 03:44:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-12-22 03:44:02,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:02,529 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:02,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 03:44:02,744 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1573829916, now seen corresponding path program 52 times [2020-12-22 03:44:02,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:02,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241206132] [2020-12-22 03:44:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:04,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241206132] [2020-12-22 03:44:04,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430603250] [2020-12-22 03:44:04,925 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:05,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:05,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 03:44:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:05,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:05,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 03:44:05,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59820959] [2020-12-22 03:44:05,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 03:44:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 03:44:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:44:05,972 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 56 states. [2020-12-22 03:44:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:06,208 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2020-12-22 03:44:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 03:44:06,209 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 426 [2020-12-22 03:44:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:06,211 INFO L225 Difference]: With dead ends: 446 [2020-12-22 03:44:06,211 INFO L226 Difference]: Without dead ends: 442 [2020-12-22 03:44:06,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:44:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-12-22 03:44:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2020-12-22 03:44:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-22 03:44:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2020-12-22 03:44:06,221 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 426 [2020-12-22 03:44:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:06,221 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2020-12-22 03:44:06,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 03:44:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2020-12-22 03:44:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-12-22 03:44:06,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:06,224 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:06,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:06,438 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2087559033, now seen corresponding path program 53 times [2020-12-22 03:44:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:06,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734290098] [2020-12-22 03:44:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:08,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734290098] [2020-12-22 03:44:08,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696391176] [2020-12-22 03:44:08,686 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:09,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 03:44:09,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 03:44:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:09,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:09,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 03:44:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841303771] [2020-12-22 03:44:09,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 03:44:09,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 03:44:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:44:09,914 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 57 states. [2020-12-22 03:44:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:10,209 INFO L93 Difference]: Finished difference Result 454 states and 454 transitions. [2020-12-22 03:44:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 03:44:10,210 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 434 [2020-12-22 03:44:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:10,212 INFO L225 Difference]: With dead ends: 454 [2020-12-22 03:44:10,212 INFO L226 Difference]: Without dead ends: 450 [2020-12-22 03:44:10,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:44:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-12-22 03:44:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2020-12-22 03:44:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 03:44:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2020-12-22 03:44:10,219 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 434 [2020-12-22 03:44:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:10,219 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2020-12-22 03:44:10,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 03:44:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2020-12-22 03:44:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-12-22 03:44:10,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:10,222 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:10,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 03:44:10,438 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1046648590, now seen corresponding path program 54 times [2020-12-22 03:44:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:10,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266978622] [2020-12-22 03:44:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266978622] [2020-12-22 03:44:12,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422201116] [2020-12-22 03:44:12,808 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:13,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 03:44:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 03:44:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:14,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:14,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 03:44:14,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93751435] [2020-12-22 03:44:14,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 03:44:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 03:44:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:44:14,099 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 58 states. [2020-12-22 03:44:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:14,410 INFO L93 Difference]: Finished difference Result 462 states and 462 transitions. [2020-12-22 03:44:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 03:44:14,410 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 442 [2020-12-22 03:44:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:14,412 INFO L225 Difference]: With dead ends: 462 [2020-12-22 03:44:14,412 INFO L226 Difference]: Without dead ends: 458 [2020-12-22 03:44:14,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:44:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-22 03:44:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 451. [2020-12-22 03:44:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-12-22 03:44:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2020-12-22 03:44:14,420 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 442 [2020-12-22 03:44:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:14,420 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2020-12-22 03:44:14,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 03:44:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2020-12-22 03:44:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-12-22 03:44:14,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:14,424 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:14,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 03:44:14,639 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash -524626339, now seen corresponding path program 55 times [2020-12-22 03:44:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:14,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714322461] [2020-12-22 03:44:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:17,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714322461] [2020-12-22 03:44:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082436624] [2020-12-22 03:44:17,039 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 03:44:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:18,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:18,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 03:44:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957466013] [2020-12-22 03:44:18,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 03:44:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 03:44:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:44:18,125 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 59 states. [2020-12-22 03:44:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:18,473 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2020-12-22 03:44:18,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 03:44:18,473 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 450 [2020-12-22 03:44:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:18,475 INFO L225 Difference]: With dead ends: 470 [2020-12-22 03:44:18,475 INFO L226 Difference]: Without dead ends: 466 [2020-12-22 03:44:18,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:44:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-22 03:44:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 459. [2020-12-22 03:44:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-12-22 03:44:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2020-12-22 03:44:18,481 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 450 [2020-12-22 03:44:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:18,482 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2020-12-22 03:44:18,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 03:44:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2020-12-22 03:44:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-12-22 03:44:18,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:18,485 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:18,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:18,698 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:18,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1363826488, now seen corresponding path program 56 times [2020-12-22 03:44:18,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:18,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368785944] [2020-12-22 03:44:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368785944] [2020-12-22 03:44:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763886999] [2020-12-22 03:44:21,217 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:21,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 03:44:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:22,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 03:44:22,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368850287] [2020-12-22 03:44:22,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 03:44:22,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 03:44:22,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:44:22,458 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 60 states. [2020-12-22 03:44:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:22,798 INFO L93 Difference]: Finished difference Result 478 states and 478 transitions. [2020-12-22 03:44:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 03:44:22,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 458 [2020-12-22 03:44:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:22,801 INFO L225 Difference]: With dead ends: 478 [2020-12-22 03:44:22,801 INFO L226 Difference]: Without dead ends: 474 [2020-12-22 03:44:22,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:44:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-22 03:44:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2020-12-22 03:44:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-12-22 03:44:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 467 transitions. [2020-12-22 03:44:22,811 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 467 transitions. Word has length 458 [2020-12-22 03:44:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:22,811 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 467 transitions. [2020-12-22 03:44:22,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 03:44:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 467 transitions. [2020-12-22 03:44:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-12-22 03:44:22,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:22,814 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:23,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 03:44:23,028 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:23,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -27729869, now seen corresponding path program 57 times [2020-12-22 03:44:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:23,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486481213] [2020-12-22 03:44:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:25,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486481213] [2020-12-22 03:44:25,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692151588] [2020-12-22 03:44:25,629 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 03:44:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:26,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 03:44:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:27,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:27,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 03:44:27,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584073118] [2020-12-22 03:44:27,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 03:44:27,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 03:44:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:44:27,010 INFO L87 Difference]: Start difference. First operand 467 states and 467 transitions. Second operand 61 states. [2020-12-22 03:44:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:27,356 INFO L93 Difference]: Finished difference Result 486 states and 486 transitions. [2020-12-22 03:44:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 03:44:27,357 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 466 [2020-12-22 03:44:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:27,359 INFO L225 Difference]: With dead ends: 486 [2020-12-22 03:44:27,359 INFO L226 Difference]: Without dead ends: 482 [2020-12-22 03:44:27,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:44:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-22 03:44:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2020-12-22 03:44:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-12-22 03:44:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 475 transitions. [2020-12-22 03:44:27,365 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 475 transitions. Word has length 466 [2020-12-22 03:44:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:27,365 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 475 transitions. [2020-12-22 03:44:27,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 03:44:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 475 transitions. [2020-12-22 03:44:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-12-22 03:44:27,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:27,367 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:27,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:27,569 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:27,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1485865826, now seen corresponding path program 58 times [2020-12-22 03:44:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:27,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808055319] [2020-12-22 03:44:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808055319] [2020-12-22 03:44:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436976502] [2020-12-22 03:44:30,328 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:30,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 03:44:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:31,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 03:44:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48540225] [2020-12-22 03:44:31,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 03:44:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 03:44:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:44:31,625 INFO L87 Difference]: Start difference. First operand 475 states and 475 transitions. Second operand 62 states. [2020-12-22 03:44:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:32,046 INFO L93 Difference]: Finished difference Result 494 states and 494 transitions. [2020-12-22 03:44:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 03:44:32,046 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 474 [2020-12-22 03:44:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:32,048 INFO L225 Difference]: With dead ends: 494 [2020-12-22 03:44:32,048 INFO L226 Difference]: Without dead ends: 490 [2020-12-22 03:44:32,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:44:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-22 03:44:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 483. [2020-12-22 03:44:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-12-22 03:44:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 483 transitions. [2020-12-22 03:44:32,055 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 483 transitions. Word has length 474 [2020-12-22 03:44:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:32,055 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 483 transitions. [2020-12-22 03:44:32,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 03:44:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 483 transitions. [2020-12-22 03:44:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-12-22 03:44:32,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:32,057 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:32,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 03:44:32,258 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2033943031, now seen corresponding path program 59 times [2020-12-22 03:44:32,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:32,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778074913] [2020-12-22 03:44:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:35,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778074913] [2020-12-22 03:44:35,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603782023] [2020-12-22 03:44:35,036 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:35,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 03:44:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:35,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 03:44:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:36,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:36,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 03:44:36,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354544615] [2020-12-22 03:44:36,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 03:44:36,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:36,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 03:44:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:44:36,470 INFO L87 Difference]: Start difference. First operand 483 states and 483 transitions. Second operand 63 states. [2020-12-22 03:44:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:36,805 INFO L93 Difference]: Finished difference Result 502 states and 502 transitions. [2020-12-22 03:44:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 03:44:36,806 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 482 [2020-12-22 03:44:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:36,808 INFO L225 Difference]: With dead ends: 502 [2020-12-22 03:44:36,808 INFO L226 Difference]: Without dead ends: 498 [2020-12-22 03:44:36,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:44:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-22 03:44:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 491. [2020-12-22 03:44:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-22 03:44:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 491 transitions. [2020-12-22 03:44:36,816 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 491 transitions. Word has length 482 [2020-12-22 03:44:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:36,816 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 491 transitions. [2020-12-22 03:44:36,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 03:44:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 491 transitions. [2020-12-22 03:44:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-12-22 03:44:36,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:36,818 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:37,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 03:44:37,019 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:37,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2116215924, now seen corresponding path program 60 times [2020-12-22 03:44:37,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:37,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034216742] [2020-12-22 03:44:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034216742] [2020-12-22 03:44:39,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633817304] [2020-12-22 03:44:39,932 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:40,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 03:44:40,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 03:44:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:41,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:41,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 03:44:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843448754] [2020-12-22 03:44:41,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 03:44:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:41,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 03:44:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:44:41,361 INFO L87 Difference]: Start difference. First operand 491 states and 491 transitions. Second operand 64 states. [2020-12-22 03:44:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:41,765 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2020-12-22 03:44:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 03:44:41,765 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 490 [2020-12-22 03:44:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:41,767 INFO L225 Difference]: With dead ends: 510 [2020-12-22 03:44:41,768 INFO L226 Difference]: Without dead ends: 506 [2020-12-22 03:44:41,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:44:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-12-22 03:44:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2020-12-22 03:44:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-12-22 03:44:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 499 transitions. [2020-12-22 03:44:41,774 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 499 transitions. Word has length 490 [2020-12-22 03:44:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:41,775 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 499 transitions. [2020-12-22 03:44:41,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 03:44:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 499 transitions. [2020-12-22 03:44:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-12-22 03:44:41,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:41,777 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:41,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:41,978 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1951772639, now seen corresponding path program 61 times [2020-12-22 03:44:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:41,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420378646] [2020-12-22 03:44:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420378646] [2020-12-22 03:44:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911038946] [2020-12-22 03:44:44,978 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 03:44:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:46,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 03:44:46,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989875333] [2020-12-22 03:44:46,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 03:44:46,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 03:44:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:44:46,229 INFO L87 Difference]: Start difference. First operand 499 states and 499 transitions. Second operand 65 states. [2020-12-22 03:44:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:46,605 INFO L93 Difference]: Finished difference Result 518 states and 518 transitions. [2020-12-22 03:44:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 03:44:46,606 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 498 [2020-12-22 03:44:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:46,608 INFO L225 Difference]: With dead ends: 518 [2020-12-22 03:44:46,608 INFO L226 Difference]: Without dead ends: 514 [2020-12-22 03:44:46,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:44:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-12-22 03:44:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 507. [2020-12-22 03:44:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-22 03:44:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 507 transitions. [2020-12-22 03:44:46,615 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 507 transitions. Word has length 498 [2020-12-22 03:44:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 507 transitions. [2020-12-22 03:44:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 03:44:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 507 transitions. [2020-12-22 03:44:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-12-22 03:44:46,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:46,617 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:46,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:46,818 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1428676682, now seen corresponding path program 62 times [2020-12-22 03:44:46,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:46,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974469070] [2020-12-22 03:44:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:49,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974469070] [2020-12-22 03:44:49,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083438857] [2020-12-22 03:44:49,925 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:50,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 03:44:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:51,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:51,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 03:44:51,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257744979] [2020-12-22 03:44:51,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 03:44:51,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 03:44:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:44:51,189 INFO L87 Difference]: Start difference. First operand 507 states and 507 transitions. Second operand 66 states. [2020-12-22 03:44:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:51,648 INFO L93 Difference]: Finished difference Result 526 states and 526 transitions. [2020-12-22 03:44:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 03:44:51,648 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 506 [2020-12-22 03:44:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:51,650 INFO L225 Difference]: With dead ends: 526 [2020-12-22 03:44:51,650 INFO L226 Difference]: Without dead ends: 522 [2020-12-22 03:44:51,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:44:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-22 03:44:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 515. [2020-12-22 03:44:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-22 03:44:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2020-12-22 03:44:51,658 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 506 [2020-12-22 03:44:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:51,658 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2020-12-22 03:44:51,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 03:44:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2020-12-22 03:44:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-12-22 03:44:51,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:51,661 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:51,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:51,862 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash 291796405, now seen corresponding path program 63 times [2020-12-22 03:44:51,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:51,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934722327] [2020-12-22 03:44:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:55,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934722327] [2020-12-22 03:44:55,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959880264] [2020-12-22 03:44:55,039 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:55,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 03:44:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:55,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 03:44:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:56,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:56,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 03:44:56,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313849562] [2020-12-22 03:44:56,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 03:44:56,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 03:44:56,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:44:56,589 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand 67 states. [2020-12-22 03:44:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:56,986 INFO L93 Difference]: Finished difference Result 534 states and 534 transitions. [2020-12-22 03:44:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 03:44:56,986 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 514 [2020-12-22 03:44:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:56,989 INFO L225 Difference]: With dead ends: 534 [2020-12-22 03:44:56,989 INFO L226 Difference]: Without dead ends: 530 [2020-12-22 03:44:56,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:44:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-12-22 03:44:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 523. [2020-12-22 03:44:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-12-22 03:44:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 523 transitions. [2020-12-22 03:44:56,997 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 523 transitions. Word has length 514 [2020-12-22 03:44:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:56,998 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 523 transitions. [2020-12-22 03:44:56,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 03:44:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 523 transitions. [2020-12-22 03:44:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2020-12-22 03:44:57,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:57,001 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:57,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:57,207 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1630113760, now seen corresponding path program 64 times [2020-12-22 03:44:57,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:57,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242021761] [2020-12-22 03:44:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242021761] [2020-12-22 03:45:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964198541] [2020-12-22 03:45:00,535 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:01,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 03:45:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:01,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:01,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 03:45:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577405677] [2020-12-22 03:45:01,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 03:45:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 03:45:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:45:01,865 INFO L87 Difference]: Start difference. First operand 523 states and 523 transitions. Second operand 68 states. [2020-12-22 03:45:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:02,364 INFO L93 Difference]: Finished difference Result 542 states and 542 transitions. [2020-12-22 03:45:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 03:45:02,365 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 522 [2020-12-22 03:45:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:02,367 INFO L225 Difference]: With dead ends: 542 [2020-12-22 03:45:02,368 INFO L226 Difference]: Without dead ends: 538 [2020-12-22 03:45:02,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:45:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-12-22 03:45:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 531. [2020-12-22 03:45:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-22 03:45:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 531 transitions. [2020-12-22 03:45:02,382 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 531 transitions. Word has length 522 [2020-12-22 03:45:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:02,382 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 531 transitions. [2020-12-22 03:45:02,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 03:45:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 531 transitions. [2020-12-22 03:45:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2020-12-22 03:45:02,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:02,387 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:02,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:02,594 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash -129446005, now seen corresponding path program 65 times [2020-12-22 03:45:02,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:02,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980033669] [2020-12-22 03:45:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:06,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980033669] [2020-12-22 03:45:06,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999986660] [2020-12-22 03:45:06,046 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:06,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 03:45:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 03:45:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:07,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:07,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 03:45:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359086041] [2020-12-22 03:45:07,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 03:45:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:07,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 03:45:07,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:45:07,658 INFO L87 Difference]: Start difference. First operand 531 states and 531 transitions. Second operand 69 states. [2020-12-22 03:45:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:08,077 INFO L93 Difference]: Finished difference Result 550 states and 550 transitions. [2020-12-22 03:45:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 03:45:08,077 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 530 [2020-12-22 03:45:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:08,080 INFO L225 Difference]: With dead ends: 550 [2020-12-22 03:45:08,080 INFO L226 Difference]: Without dead ends: 546 [2020-12-22 03:45:08,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:45:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-12-22 03:45:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 539. [2020-12-22 03:45:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-22 03:45:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2020-12-22 03:45:08,093 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 530 [2020-12-22 03:45:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:08,093 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2020-12-22 03:45:08,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 03:45:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2020-12-22 03:45:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-12-22 03:45:08,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:08,097 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:08,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 03:45:08,310 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash 495358966, now seen corresponding path program 66 times [2020-12-22 03:45:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:08,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452482273] [2020-12-22 03:45:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452482273] [2020-12-22 03:45:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612621019] [2020-12-22 03:45:11,889 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:12,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 03:45:12,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 03:45:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:13,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:13,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 03:45:13,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17274356] [2020-12-22 03:45:13,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 03:45:13,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 03:45:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:45:13,598 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 70 states. [2020-12-22 03:45:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:14,107 INFO L93 Difference]: Finished difference Result 558 states and 558 transitions. [2020-12-22 03:45:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 03:45:14,108 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 538 [2020-12-22 03:45:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:14,111 INFO L225 Difference]: With dead ends: 558 [2020-12-22 03:45:14,111 INFO L226 Difference]: Without dead ends: 554 [2020-12-22 03:45:14,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:45:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-12-22 03:45:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 547. [2020-12-22 03:45:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-12-22 03:45:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 547 transitions. [2020-12-22 03:45:14,118 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 547 transitions. Word has length 538 [2020-12-22 03:45:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:14,119 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 547 transitions. [2020-12-22 03:45:14,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 03:45:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 547 transitions. [2020-12-22 03:45:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-12-22 03:45:14,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:14,121 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:14,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 03:45:14,322 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 324713825, now seen corresponding path program 67 times [2020-12-22 03:45:14,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931116346] [2020-12-22 03:45:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931116346] [2020-12-22 03:45:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747230929] [2020-12-22 03:45:17,926 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 2276 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 03:45:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:19,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:19,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 03:45:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457892608] [2020-12-22 03:45:19,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 03:45:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 03:45:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:45:19,283 INFO L87 Difference]: Start difference. First operand 547 states and 547 transitions. Second operand 71 states. [2020-12-22 03:45:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:19,683 INFO L93 Difference]: Finished difference Result 566 states and 566 transitions. [2020-12-22 03:45:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 03:45:19,684 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 546 [2020-12-22 03:45:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:19,686 INFO L225 Difference]: With dead ends: 566 [2020-12-22 03:45:19,686 INFO L226 Difference]: Without dead ends: 562 [2020-12-22 03:45:19,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:45:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-22 03:45:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 555. [2020-12-22 03:45:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-12-22 03:45:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 555 transitions. [2020-12-22 03:45:19,693 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 555 transitions. Word has length 546 [2020-12-22 03:45:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:19,693 INFO L481 AbstractCegarLoop]: Abstraction has 555 states and 555 transitions. [2020-12-22 03:45:19,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 03:45:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 555 transitions. [2020-12-22 03:45:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2020-12-22 03:45:19,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:19,696 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:19,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:19,897 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash -477082676, now seen corresponding path program 68 times [2020-12-22 03:45:19,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:19,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273799832] [2020-12-22 03:45:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273799832] [2020-12-22 03:45:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590526535] [2020-12-22 03:45:23,621 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:24,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:45:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 03:45:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:25,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 03:45:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601671578] [2020-12-22 03:45:25,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 03:45:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 03:45:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:45:25,030 INFO L87 Difference]: Start difference. First operand 555 states and 555 transitions. Second operand 72 states. [2020-12-22 03:45:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:25,597 INFO L93 Difference]: Finished difference Result 574 states and 574 transitions. [2020-12-22 03:45:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 03:45:25,598 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 554 [2020-12-22 03:45:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:25,600 INFO L225 Difference]: With dead ends: 574 [2020-12-22 03:45:25,600 INFO L226 Difference]: Without dead ends: 570 [2020-12-22 03:45:25,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:45:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-12-22 03:45:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 563. [2020-12-22 03:45:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-12-22 03:45:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2020-12-22 03:45:25,608 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 554 [2020-12-22 03:45:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:25,608 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2020-12-22 03:45:25,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 03:45:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2020-12-22 03:45:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-12-22 03:45:25,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:25,612 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:25,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 03:45:25,813 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1661845705, now seen corresponding path program 69 times [2020-12-22 03:45:25,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:25,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449489361] [2020-12-22 03:45:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:29,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449489361] [2020-12-22 03:45:29,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103559865] [2020-12-22 03:45:29,617 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:30,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-22 03:45:30,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 03:45:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:31,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:31,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 03:45:31,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220308594] [2020-12-22 03:45:31,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 03:45:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 03:45:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:45:31,391 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 73 states. [2020-12-22 03:45:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:31,969 INFO L93 Difference]: Finished difference Result 582 states and 582 transitions. [2020-12-22 03:45:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 03:45:31,970 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 562 [2020-12-22 03:45:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:31,972 INFO L225 Difference]: With dead ends: 582 [2020-12-22 03:45:31,972 INFO L226 Difference]: Without dead ends: 578 [2020-12-22 03:45:31,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:45:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-22 03:45:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 571. [2020-12-22 03:45:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-22 03:45:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 571 transitions. [2020-12-22 03:45:31,980 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 571 transitions. Word has length 562 [2020-12-22 03:45:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:31,980 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 571 transitions. [2020-12-22 03:45:31,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 03:45:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 571 transitions. [2020-12-22 03:45:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-12-22 03:45:31,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:31,983 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:32,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 03:45:32,184 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:32,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:32,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1397462946, now seen corresponding path program 70 times [2020-12-22 03:45:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:32,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039315431] [2020-12-22 03:45:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:36,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039315431] [2020-12-22 03:45:36,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333991220] [2020-12-22 03:45:36,216 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:36,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:36,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 03:45:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:37,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:37,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 03:45:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7852153] [2020-12-22 03:45:37,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 03:45:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 03:45:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:45:37,622 INFO L87 Difference]: Start difference. First operand 571 states and 571 transitions. Second operand 74 states. [2020-12-22 03:45:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:38,175 INFO L93 Difference]: Finished difference Result 590 states and 590 transitions. [2020-12-22 03:45:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 03:45:38,175 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 570 [2020-12-22 03:45:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:38,178 INFO L225 Difference]: With dead ends: 590 [2020-12-22 03:45:38,179 INFO L226 Difference]: Without dead ends: 586 [2020-12-22 03:45:38,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:45:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-12-22 03:45:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 579. [2020-12-22 03:45:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-12-22 03:45:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 579 transitions. [2020-12-22 03:45:38,189 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 579 transitions. Word has length 570 [2020-12-22 03:45:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:38,189 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 579 transitions. [2020-12-22 03:45:38,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 03:45:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 579 transitions. [2020-12-22 03:45:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-12-22 03:45:38,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:38,192 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:38,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-22 03:45:38,393 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:38,394 INFO L82 PathProgramCache]: Analyzing trace with hash 526865677, now seen corresponding path program 71 times [2020-12-22 03:45:38,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:38,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556577067] [2020-12-22 03:45:38,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556577067] [2020-12-22 03:45:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720524158] [2020-12-22 03:45:42,515 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:43,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-22 03:45:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 03:45:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:44,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:44,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 03:45:44,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684227883] [2020-12-22 03:45:44,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 03:45:44,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 03:45:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:45:44,260 INFO L87 Difference]: Start difference. First operand 579 states and 579 transitions. Second operand 75 states. [2020-12-22 03:45:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:44,870 INFO L93 Difference]: Finished difference Result 598 states and 598 transitions. [2020-12-22 03:45:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 03:45:44,871 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 578 [2020-12-22 03:45:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:44,873 INFO L225 Difference]: With dead ends: 598 [2020-12-22 03:45:44,873 INFO L226 Difference]: Without dead ends: 594 [2020-12-22 03:45:44,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:45:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-22 03:45:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 587. [2020-12-22 03:45:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-12-22 03:45:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 587 transitions. [2020-12-22 03:45:44,881 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 587 transitions. Word has length 578 [2020-12-22 03:45:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:44,881 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 587 transitions. [2020-12-22 03:45:44,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 03:45:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 587 transitions. [2020-12-22 03:45:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-12-22 03:45:44,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:44,884 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:45,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:45,085 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash 521172856, now seen corresponding path program 72 times [2020-12-22 03:45:45,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:45,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846447561] [2020-12-22 03:45:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:49,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846447561] [2020-12-22 03:45:49,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868674268] [2020-12-22 03:45:49,276 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:50,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-22 03:45:50,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 03:45:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:51,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:51,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 03:45:51,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271285904] [2020-12-22 03:45:51,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 03:45:51,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:51,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 03:45:51,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:45:51,191 INFO L87 Difference]: Start difference. First operand 587 states and 587 transitions. Second operand 76 states. [2020-12-22 03:45:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:51,799 INFO L93 Difference]: Finished difference Result 606 states and 606 transitions. [2020-12-22 03:45:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 03:45:51,800 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 586 [2020-12-22 03:45:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:51,802 INFO L225 Difference]: With dead ends: 606 [2020-12-22 03:45:51,802 INFO L226 Difference]: Without dead ends: 602 [2020-12-22 03:45:51,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:45:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-12-22 03:45:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 595. [2020-12-22 03:45:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-12-22 03:45:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 595 transitions. [2020-12-22 03:45:51,813 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 595 transitions. Word has length 586 [2020-12-22 03:45:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 595 transitions. [2020-12-22 03:45:51,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 03:45:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 595 transitions. [2020-12-22 03:45:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2020-12-22 03:45:51,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:51,817 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:52,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:52,018 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1964113635, now seen corresponding path program 73 times [2020-12-22 03:45:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:52,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878742906] [2020-12-22 03:45:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878742906] [2020-12-22 03:45:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307500488] [2020-12-22 03:45:56,342 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 03:45:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:57,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:57,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 03:45:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116471764] [2020-12-22 03:45:57,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 03:45:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 03:45:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:45:57,848 INFO L87 Difference]: Start difference. First operand 595 states and 595 transitions. Second operand 77 states. [2020-12-22 03:45:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:58,286 INFO L93 Difference]: Finished difference Result 614 states and 614 transitions. [2020-12-22 03:45:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 03:45:58,287 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 594 [2020-12-22 03:45:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:58,289 INFO L225 Difference]: With dead ends: 614 [2020-12-22 03:45:58,289 INFO L226 Difference]: Without dead ends: 610 [2020-12-22 03:45:58,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:45:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-12-22 03:45:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 603. [2020-12-22 03:45:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-22 03:45:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 603 transitions. [2020-12-22 03:45:58,297 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 603 transitions. Word has length 594 [2020-12-22 03:45:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:58,297 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 603 transitions. [2020-12-22 03:45:58,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 03:45:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 603 transitions. [2020-12-22 03:45:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2020-12-22 03:45:58,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:58,300 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:58,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:58,501 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1228335950, now seen corresponding path program 74 times [2020-12-22 03:45:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:58,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671777241] [2020-12-22 03:45:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:02,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671777241] [2020-12-22 03:46:02,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634196838] [2020-12-22 03:46:02,939 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:03,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:46:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:03,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 03:46:03,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:04,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:04,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 03:46:04,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773330278] [2020-12-22 03:46:04,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 03:46:04,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 03:46:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:46:04,505 INFO L87 Difference]: Start difference. First operand 603 states and 603 transitions. Second operand 78 states. [2020-12-22 03:46:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:05,023 INFO L93 Difference]: Finished difference Result 622 states and 622 transitions. [2020-12-22 03:46:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 03:46:05,024 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 602 [2020-12-22 03:46:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:05,026 INFO L225 Difference]: With dead ends: 622 [2020-12-22 03:46:05,026 INFO L226 Difference]: Without dead ends: 618 [2020-12-22 03:46:05,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:46:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-22 03:46:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 611. [2020-12-22 03:46:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 03:46:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 611 transitions. [2020-12-22 03:46:05,033 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 611 transitions. Word has length 602 [2020-12-22 03:46:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:05,034 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 611 transitions. [2020-12-22 03:46:05,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 03:46:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 611 transitions. [2020-12-22 03:46:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-12-22 03:46:05,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:05,037 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:05,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 03:46:05,238 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash -934658887, now seen corresponding path program 75 times [2020-12-22 03:46:05,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:05,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545041596] [2020-12-22 03:46:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:09,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545041596] [2020-12-22 03:46:09,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771023041] [2020-12-22 03:46:09,851 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:10,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-22 03:46:10,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 03:46:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:11,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:11,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 03:46:11,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655157788] [2020-12-22 03:46:11,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 03:46:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 03:46:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:46:11,801 INFO L87 Difference]: Start difference. First operand 611 states and 611 transitions. Second operand 79 states. [2020-12-22 03:46:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:12,309 INFO L93 Difference]: Finished difference Result 630 states and 630 transitions. [2020-12-22 03:46:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 03:46:12,310 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 610 [2020-12-22 03:46:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:12,312 INFO L225 Difference]: With dead ends: 630 [2020-12-22 03:46:12,312 INFO L226 Difference]: Without dead ends: 626 [2020-12-22 03:46:12,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:46:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-12-22 03:46:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 619. [2020-12-22 03:46:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-12-22 03:46:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 619 transitions. [2020-12-22 03:46:12,321 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 619 transitions. Word has length 610 [2020-12-22 03:46:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:12,321 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 619 transitions. [2020-12-22 03:46:12,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 03:46:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 619 transitions. [2020-12-22 03:46:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-12-22 03:46:12,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:12,324 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:12,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:12,525 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash 605483812, now seen corresponding path program 76 times [2020-12-22 03:46:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:12,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361243588] [2020-12-22 03:46:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:17,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361243588] [2020-12-22 03:46:17,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655547679] [2020-12-22 03:46:17,273 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:17,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:46:17,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 03:46:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:18,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:18,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 03:46:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347330316] [2020-12-22 03:46:18,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 03:46:18,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 03:46:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:46:18,833 INFO L87 Difference]: Start difference. First operand 619 states and 619 transitions. Second operand 80 states. [2020-12-22 03:46:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:19,387 INFO L93 Difference]: Finished difference Result 638 states and 638 transitions. [2020-12-22 03:46:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 03:46:19,388 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 618 [2020-12-22 03:46:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:19,390 INFO L225 Difference]: With dead ends: 638 [2020-12-22 03:46:19,390 INFO L226 Difference]: Without dead ends: 634 [2020-12-22 03:46:19,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:46:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-12-22 03:46:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 627. [2020-12-22 03:46:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-12-22 03:46:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 627 transitions. [2020-12-22 03:46:19,399 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 627 transitions. Word has length 618 [2020-12-22 03:46:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:19,399 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 627 transitions. [2020-12-22 03:46:19,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 03:46:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 627 transitions. [2020-12-22 03:46:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-12-22 03:46:19,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:19,420 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:19,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:19,622 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1821897073, now seen corresponding path program 77 times [2020-12-22 03:46:19,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:19,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506222970] [2020-12-22 03:46:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 23485 backedges. 0 proven. 23485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:24,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506222970] [2020-12-22 03:46:24,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573679337] [2020-12-22 03:46:24,498 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:25,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 03:46:25,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:25,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 03:46:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 23485 backedges. 0 proven. 23485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:26,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:26,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 03:46:26,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166166989] [2020-12-22 03:46:26,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 03:46:26,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 03:46:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:46:26,516 INFO L87 Difference]: Start difference. First operand 627 states and 627 transitions. Second operand 81 states. [2020-12-22 03:46:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:27,016 INFO L93 Difference]: Finished difference Result 646 states and 646 transitions. [2020-12-22 03:46:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 03:46:27,016 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 626 [2020-12-22 03:46:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:27,019 INFO L225 Difference]: With dead ends: 646 [2020-12-22 03:46:27,019 INFO L226 Difference]: Without dead ends: 642 [2020-12-22 03:46:27,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:46:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-12-22 03:46:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 635. [2020-12-22 03:46:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-12-22 03:46:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 635 transitions. [2020-12-22 03:46:27,027 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 635 transitions. Word has length 626 [2020-12-22 03:46:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:27,028 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 635 transitions. [2020-12-22 03:46:27,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 03:46:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 635 transitions. [2020-12-22 03:46:27,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2020-12-22 03:46:27,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:27,031 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:27,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 03:46:27,232 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:27,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1376292602, now seen corresponding path program 78 times [2020-12-22 03:46:27,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:27,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584510185] [2020-12-22 03:46:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat