/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:42:49,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:42:49,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:42:49,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 22:42:49,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:42:49,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:42:49,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:42:49,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:42:49,548 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:42:49,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:42:49,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:42:49,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:42:49,553 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:42:49,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:42:49,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:42:49,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:42:49,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:42:49,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:42:49,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:42:49,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:42:49,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:42:49,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:42:49,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:42:49,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:42:49,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:42:49,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:42:49,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:42:49,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:42:49,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:42:49,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:42:49,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:42:49,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:42:49,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:42:49,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:42:50,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:42:50,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:42:50,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:42:50,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:42:50,036 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:42:50,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c [2020-12-21 22:42:50,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c4253a8/aa46d0d97bd742199184210fc3183165/FLAG54d8de4c8 [2020-12-21 22:42:50,715 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:42:50,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c [2020-12-21 22:42:50,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c4253a8/aa46d0d97bd742199184210fc3183165/FLAG54d8de4c8 [2020-12-21 22:42:51,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c4253a8/aa46d0d97bd742199184210fc3183165 [2020-12-21 22:42:51,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:42:51,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:42:51,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:42:51,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:42:51,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:42:51,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14edf87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51, skipping insertion in model container [2020-12-21 22:42:51,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:42:51,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:42:51,387 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2020-12-21 22:42:51,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:42:51,423 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:42:51,441 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2020-12-21 22:42:51,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:42:51,474 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:42:51,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51 WrapperNode [2020-12-21 22:42:51,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:42:51,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:42:51,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:42:51,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:42:51,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:42:51,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:42:51,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:42:51,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:42:51,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... [2020-12-21 22:42:51,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:42:51,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:42:51,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:42:51,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:42:51,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:42:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:42:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:42:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:42:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:42:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:42:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:42:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:42:52,106 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:42:52,106 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:42:52,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:42:52 BoogieIcfgContainer [2020-12-21 22:42:52,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:42:52,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:42:52,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:42:52,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:42:52,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:42:51" (1/3) ... [2020-12-21 22:42:52,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805309d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:42:52, skipping insertion in model container [2020-12-21 22:42:52,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:42:51" (2/3) ... [2020-12-21 22:42:52,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805309d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:42:52, skipping insertion in model container [2020-12-21 22:42:52,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:42:52" (3/3) ... [2020-12-21 22:42:52,125 INFO L111 eAbstractionObserver]: Analyzing ICFG array_doub_access_init_const.c [2020-12-21 22:42:52,133 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:42:52,138 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:42:52,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:42:52,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:42:52,195 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:42:52,195 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:42:52,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:42:52,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:42:52,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:42:52,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:42:52,196 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:42:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-21 22:42:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 22:42:52,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:52,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:52,218 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-21 22:42:52,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:52,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120931466] [2020-12-21 22:42:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:52,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120931466] [2020-12-21 22:42:52,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:42:52,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:42:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062682666] [2020-12-21 22:42:52,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:42:52,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:42:52,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:42:52,509 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-21 22:42:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:52,590 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-12-21 22:42:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:42:52,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-21 22:42:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:52,603 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:42:52,603 INFO L226 Difference]: Without dead ends: 13 [2020-12-21 22:42:52,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:42:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-21 22:42:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-21 22:42:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 22:42:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-21 22:42:52,642 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2020-12-21 22:42:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:52,643 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-21 22:42:52,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:42:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-21 22:42:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:42:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:52,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:52,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:42:52,644 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-21 22:42:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:52,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017862263] [2020-12-21 22:42:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:52,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017862263] [2020-12-21 22:42:52,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317703879] [2020-12-21 22:42:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:42:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:52,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:52,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-21 22:42:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014598596] [2020-12-21 22:42:52,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:42:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:52,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:42:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:42:52,884 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-21 22:42:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:52,923 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-21 22:42:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:42:52,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-21 22:42:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:52,925 INFO L225 Difference]: With dead ends: 22 [2020-12-21 22:42:52,925 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 22:42:52,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:42:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 22:42:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-21 22:42:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 22:42:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-21 22:42:52,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-21 22:42:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:52,931 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-21 22:42:52,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:42:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-21 22:42:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:42:52,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:52,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:53,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 22:42:53,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-21 22:42:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664344976] [2020-12-21 22:42:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:53,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664344976] [2020-12-21 22:42:53,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268094378] [2020-12-21 22:42:53,290 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 [2020-12-21 22:42:53,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:42:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:42:53,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:53,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:53,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:42:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540254590] [2020-12-21 22:42:53,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:42:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:42:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:42:53,478 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-12-21 22:42:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:53,531 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-21 22:42:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:42:53,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-21 22:42:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:53,533 INFO L225 Difference]: With dead ends: 24 [2020-12-21 22:42:53,533 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:42:53,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:42:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:42:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 22:42:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 22:42:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-21 22:42:53,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-21 22:42:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:53,539 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-21 22:42:53,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:42:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-21 22:42:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:42:53,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:53,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:53,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:53,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-21 22:42:53,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:53,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091465143] [2020-12-21 22:42:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:53,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091465143] [2020-12-21 22:42:53,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453640711] [2020-12-21 22:42:53,871 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 [2020-12-21 22:42:53,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:42:53,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:42:53,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:54,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:54,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:42:54,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596928262] [2020-12-21 22:42:54,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:42:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:42:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:42:54,065 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2020-12-21 22:42:54,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:54,128 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-21 22:42:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:42:54,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-21 22:42:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:54,130 INFO L225 Difference]: With dead ends: 26 [2020-12-21 22:42:54,130 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 22:42:54,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:42:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 22:42:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-21 22:42:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:42:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-21 22:42:54,136 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-12-21 22:42:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:54,136 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-21 22:42:54,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:42:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-21 22:42:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:42:54,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:54,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:54,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:54,351 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-21 22:42:54,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:54,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364638614] [2020-12-21 22:42:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:54,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364638614] [2020-12-21 22:42:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993517608] [2020-12-21 22:42:54,447 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 [2020-12-21 22:42:54,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:42:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:42:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:54,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:54,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-21 22:42:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751156138] [2020-12-21 22:42:54,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:42:54,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:42:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:42:54,640 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2020-12-21 22:42:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:54,697 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-21 22:42:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:42:54,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-21 22:42:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:54,699 INFO L225 Difference]: With dead ends: 28 [2020-12-21 22:42:54,699 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 22:42:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:42:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 22:42:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-21 22:42:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:42:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-21 22:42:54,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-21 22:42:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:54,705 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-21 22:42:54,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:42:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-21 22:42:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:42:54,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:54,706 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:54,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:54,920 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-21 22:42:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:54,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420901362] [2020-12-21 22:42:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420901362] [2020-12-21 22:42:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782085672] [2020-12-21 22:42:55,071 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 [2020-12-21 22:42:55,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:42:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:42:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:55,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:55,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-21 22:42:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225786885] [2020-12-21 22:42:55,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:42:55,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:42:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:42:55,376 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-12-21 22:42:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:55,452 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-21 22:42:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:42:55,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-21 22:42:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:55,453 INFO L225 Difference]: With dead ends: 30 [2020-12-21 22:42:55,454 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:42:55,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:42:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:42:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 22:42:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:42:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-21 22:42:55,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-12-21 22:42:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:55,471 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-21 22:42:55,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:42:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-21 22:42:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:42:55,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:55,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:55,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 22:42:55,680 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:55,682 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-21 22:42:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:55,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608180705] [2020-12-21 22:42:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:55,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608180705] [2020-12-21 22:42:55,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455137302] [2020-12-21 22:42:55,872 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 [2020-12-21 22:42:55,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:42:55,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:55,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:42:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:56,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:56,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-21 22:42:56,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714684787] [2020-12-21 22:42:56,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:42:56,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:56,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:42:56,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:42:56,197 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 16 states. [2020-12-21 22:42:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:56,272 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-21 22:42:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:42:56,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-21 22:42:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:56,274 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:42:56,274 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 22:42:56,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:42:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 22:42:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-21 22:42:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:42:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-21 22:42:56,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-21 22:42:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:56,286 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-21 22:42:56,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:42:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-21 22:42:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:42:56,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:56,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:56,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:56,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-21 22:42:56,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:56,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473010813] [2020-12-21 22:42:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:56,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473010813] [2020-12-21 22:42:56,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655700640] [2020-12-21 22:42:56,629 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 [2020-12-21 22:42:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:42:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:56,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:56,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-21 22:42:56,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428640996] [2020-12-21 22:42:56,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:42:56,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:42:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:42:56,838 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 18 states. [2020-12-21 22:42:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:56,897 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-21 22:42:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:42:56,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-21 22:42:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:56,899 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:42:56,899 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:42:56,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:42:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:42:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-21 22:42:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:42:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-21 22:42:56,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-12-21 22:42:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:56,904 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-21 22:42:56,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:42:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-21 22:42:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:42:56,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:56,905 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:57,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:57,120 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-21 22:42:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:57,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861736530] [2020-12-21 22:42:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:57,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861736530] [2020-12-21 22:42:57,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312524897] [2020-12-21 22:42:57,284 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 [2020-12-21 22:42:57,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:42:57,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:42:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:57,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:57,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-21 22:42:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977240000] [2020-12-21 22:42:57,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:42:57,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:42:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:42:57,522 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-21 22:42:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:57,578 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-21 22:42:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:42:57,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-21 22:42:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:57,579 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:42:57,579 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:42:57,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:42:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:42:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-21 22:42:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:42:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-21 22:42:57,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-12-21 22:42:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:57,584 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-21 22:42:57,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:42:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-21 22:42:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:42:57,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:57,585 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:57,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 22:42:57,796 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-21 22:42:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:57,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142039778] [2020-12-21 22:42:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:57,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142039778] [2020-12-21 22:42:57,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530370933] [2020-12-21 22:42:57,958 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 [2020-12-21 22:42:58,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:42:58,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:58,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:42:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-21 22:42:58,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765283916] [2020-12-21 22:42:58,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:42:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:58,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:42:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:42:58,376 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 22 states. [2020-12-21 22:42:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:58,481 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-21 22:42:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:42:58,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-21 22:42:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:58,483 INFO L225 Difference]: With dead ends: 38 [2020-12-21 22:42:58,483 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 22:42:58,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:42:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 22:42:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-21 22:42:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:42:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-21 22:42:58,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-12-21 22:42:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:58,497 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-21 22:42:58,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:42:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-21 22:42:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:42:58,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:58,498 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:58,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:58,711 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-21 22:42:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:58,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362726196] [2020-12-21 22:42:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:58,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362726196] [2020-12-21 22:42:58,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434214864] [2020-12-21 22:42:58,910 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 [2020-12-21 22:42:59,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:42:59,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:42:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:42:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:42:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:42:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-21 22:42:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017170880] [2020-12-21 22:42:59,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:42:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:42:59,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:42:59,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:42:59,396 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 24 states. [2020-12-21 22:42:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:42:59,485 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-21 22:42:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:42:59,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-21 22:42:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:42:59,489 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:42:59,490 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:42:59,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:42:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:42:59,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-21 22:42:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:42:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-21 22:42:59,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-21 22:42:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:42:59,506 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-21 22:42:59,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:42:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-21 22:42:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:42:59,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:42:59,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:42:59,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:42:59,724 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:42:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:42:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-21 22:42:59,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:42:59,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842843752] [2020-12-21 22:42:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:42:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:42:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:42:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842843752] [2020-12-21 22:42:59,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277978037] [2020-12-21 22:42:59,963 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 [2020-12-21 22:43:00,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 22:43:00,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:43:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:00,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:00,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-21 22:43:00,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709624668] [2020-12-21 22:43:00,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 22:43:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:00,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 22:43:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:43:00,619 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 26 states. [2020-12-21 22:43:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:00,723 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-21 22:43:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:43:00,723 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-21 22:43:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:00,724 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:43:00,724 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:43:00,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:43:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:43:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-21 22:43:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:43:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-21 22:43:00,740 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-12-21 22:43:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:00,740 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-21 22:43:00,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 22:43:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-21 22:43:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:43:00,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:00,746 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:00,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 22:43:00,947 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-21 22:43:00,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:00,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232286374] [2020-12-21 22:43:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:01,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232286374] [2020-12-21 22:43:01,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640256082] [2020-12-21 22:43:01,134 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 [2020-12-21 22:43:01,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:43:01,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:43:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:02,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-21 22:43:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689763495] [2020-12-21 22:43:02,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:43:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:02,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:43:02,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:43:02,148 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 28 states. [2020-12-21 22:43:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:02,255 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-12-21 22:43:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:43:02,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-12-21 22:43:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:02,257 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:43:02,257 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:43:02,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:43:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:43:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 22:43:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:43:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-21 22:43:02,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-12-21 22:43:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:02,263 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-21 22:43:02,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:43:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-21 22:43:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 22:43:02,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:02,264 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:02,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:43:02,478 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-21 22:43:02,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:02,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056353314] [2020-12-21 22:43:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056353314] [2020-12-21 22:43:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219634294] [2020-12-21 22:43:02,679 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 [2020-12-21 22:43:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:02,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:43:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-21 22:43:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720942518] [2020-12-21 22:43:03,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 22:43:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 22:43:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:43:03,040 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 30 states. [2020-12-21 22:43:03,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:03,159 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-21 22:43:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:43:03,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-12-21 22:43:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:03,161 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:43:03,161 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:43:03,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:43:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:43:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-21 22:43:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 22:43:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-21 22:43:03,166 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-12-21 22:43:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:03,166 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-21 22:43:03,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 22:43:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-21 22:43:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:43:03,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:03,167 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:03,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:43:03,383 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-21 22:43:03,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:03,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138384502] [2020-12-21 22:43:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:03,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138384502] [2020-12-21 22:43:03,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985651160] [2020-12-21 22:43:03,591 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 [2020-12-21 22:43:03,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:43:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:03,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:03,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-21 22:43:03,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710077905] [2020-12-21 22:43:04,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:43:04,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:43:04,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:43:04,006 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 32 states. [2020-12-21 22:43:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:04,115 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-21 22:43:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:43:04,116 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-12-21 22:43:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:04,116 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:43:04,117 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:43:04,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:43:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:43:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 22:43:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:43:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-21 22:43:04,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-12-21 22:43:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:04,122 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-21 22:43:04,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:43:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-21 22:43:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:43:04,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:04,123 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:04,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:04,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:04,333 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-21 22:43:04,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:04,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118191127] [2020-12-21 22:43:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118191127] [2020-12-21 22:43:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673229761] [2020-12-21 22:43:04,556 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 [2020-12-21 22:43:05,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 22:43:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:43:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:05,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:05,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-12-21 22:43:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594093876] [2020-12-21 22:43:05,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 22:43:05,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 22:43:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:43:05,718 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 34 states. [2020-12-21 22:43:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:05,846 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-21 22:43:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:43:05,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-12-21 22:43:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:05,847 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:43:05,847 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:43:05,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=666, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:43:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:43:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-21 22:43:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 22:43:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-21 22:43:05,852 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-12-21 22:43:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:05,853 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-21 22:43:05,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 22:43:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-21 22:43:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:43:05,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:05,854 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:06,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:43:06,068 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-21 22:43:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:06,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095549676] [2020-12-21 22:43:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:06,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095549676] [2020-12-21 22:43:06,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929183653] [2020-12-21 22:43:06,314 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 [2020-12-21 22:43:07,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:43:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:07,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:43:07,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:08,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:08,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-21 22:43:08,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459164413] [2020-12-21 22:43:08,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:43:08,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:43:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:43:08,329 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-12-21 22:43:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:08,464 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-21 22:43:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:43:08,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-12-21 22:43:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:08,465 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:43:08,465 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 22:43:08,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:43:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 22:43:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-21 22:43:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:43:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-21 22:43:08,470 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2020-12-21 22:43:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:08,470 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-21 22:43:08,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:43:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-21 22:43:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:43:08,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:08,471 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:08,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:43:08,686 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-21 22:43:08,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:08,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124404718] [2020-12-21 22:43:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:08,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124404718] [2020-12-21 22:43:08,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217622297] [2020-12-21 22:43:08,960 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 [2020-12-21 22:43:09,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 22:43:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:43:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:10,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:10,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-21 22:43:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147231221] [2020-12-21 22:43:10,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 22:43:10,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 22:43:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:43:10,359 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 38 states. [2020-12-21 22:43:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:10,506 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-21 22:43:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:43:10,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-12-21 22:43:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:10,507 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:43:10,507 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 22:43:10,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=567, Invalid=839, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:43:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 22:43:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-21 22:43:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:43:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-21 22:43:10,514 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-12-21 22:43:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:10,514 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-21 22:43:10,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 22:43:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-21 22:43:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:43:10,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:10,515 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:10,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:43:10,725 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-21 22:43:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:10,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399106941] [2020-12-21 22:43:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399106941] [2020-12-21 22:43:11,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541774714] [2020-12-21 22:43:11,055 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 [2020-12-21 22:43:16,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 22:43:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:43:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:16,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:16,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-21 22:43:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251187343] [2020-12-21 22:43:16,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:43:16,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:16,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:43:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:43:16,705 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 40 states. [2020-12-21 22:43:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:16,825 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-21 22:43:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 22:43:16,826 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-12-21 22:43:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:16,827 INFO L225 Difference]: With dead ends: 56 [2020-12-21 22:43:16,828 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 22:43:16,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=933, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:43:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 22:43:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 22:43:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:43:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-21 22:43:16,833 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2020-12-21 22:43:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:16,835 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-21 22:43:16,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:43:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-21 22:43:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 22:43:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:16,836 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:17,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:17,051 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-21 22:43:17,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:17,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458075079] [2020-12-21 22:43:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458075079] [2020-12-21 22:43:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152065203] [2020-12-21 22:43:17,414 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 [2020-12-21 22:43:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:43:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:17,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:17,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2020-12-21 22:43:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862155564] [2020-12-21 22:43:17,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:43:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:43:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:43:17,979 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 42 states. [2020-12-21 22:43:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:18,152 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-21 22:43:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:43:18,152 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-12-21 22:43:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:18,153 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:43:18,153 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:43:18,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=1032, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:43:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:43:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-21 22:43:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:43:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-21 22:43:18,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-12-21 22:43:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:18,157 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-21 22:43:18,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:43:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-21 22:43:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 22:43:18,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:18,158 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:18,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:18,373 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-21 22:43:18,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:18,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452249556] [2020-12-21 22:43:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:18,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452249556] [2020-12-21 22:43:18,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890780548] [2020-12-21 22:43:18,773 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 [2020-12-21 22:43:18,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:18,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:18,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:43:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-21 22:43:19,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898084045] [2020-12-21 22:43:19,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:43:19,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:43:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:43:19,337 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 44 states. [2020-12-21 22:43:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:19,452 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-21 22:43:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 22:43:19,453 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-12-21 22:43:19,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:19,454 INFO L225 Difference]: With dead ends: 60 [2020-12-21 22:43:19,454 INFO L226 Difference]: Without dead ends: 53 [2020-12-21 22:43:19,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1136, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:43:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-21 22:43:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-21 22:43:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:43:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-21 22:43:19,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-21 22:43:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:19,469 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-21 22:43:19,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:43:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-21 22:43:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:43:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:19,470 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:19,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:43:19,684 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-21 22:43:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:19,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665648233] [2020-12-21 22:43:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:20,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665648233] [2020-12-21 22:43:20,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484674070] [2020-12-21 22:43:20,108 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 [2020-12-21 22:43:27,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-21 22:43:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:43:27,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:27,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:27,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2020-12-21 22:43:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806388736] [2020-12-21 22:43:27,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 22:43:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 22:43:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:43:27,832 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 46 states. [2020-12-21 22:43:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:28,002 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-12-21 22:43:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:43:28,006 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2020-12-21 22:43:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:28,007 INFO L225 Difference]: With dead ends: 62 [2020-12-21 22:43:28,007 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 22:43:28,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:43:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 22:43:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 22:43:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:43:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-21 22:43:28,011 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-12-21 22:43:28,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:28,011 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-21 22:43:28,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 22:43:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-21 22:43:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:43:28,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:28,012 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:28,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 22:43:28,213 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-21 22:43:28,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:28,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465183803] [2020-12-21 22:43:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:28,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465183803] [2020-12-21 22:43:28,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899540537] [2020-12-21 22:43:28,639 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 [2020-12-21 22:43:35,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:43:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:43:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:36,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:36,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-21 22:43:36,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624249928] [2020-12-21 22:43:36,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 22:43:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 22:43:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:43:36,499 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 48 states. [2020-12-21 22:43:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:36,639 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-21 22:43:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:43:36,639 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2020-12-21 22:43:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:36,640 INFO L225 Difference]: With dead ends: 64 [2020-12-21 22:43:36,640 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:43:36,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1359, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 22:43:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:43:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-21 22:43:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 22:43:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-21 22:43:36,646 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-12-21 22:43:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:36,646 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-21 22:43:36,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 22:43:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-21 22:43:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 22:43:36,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:36,647 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:36,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:36,848 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-21 22:43:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:36,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396815577] [2020-12-21 22:43:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396815577] [2020-12-21 22:43:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057719591] [2020-12-21 22:43:37,313 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 [2020-12-21 22:43:51,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 22:43:51,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:43:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:51,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:51,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-21 22:43:51,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461797178] [2020-12-21 22:43:51,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:43:51,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:43:51,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:43:51,771 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 50 states. [2020-12-21 22:43:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:51,966 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-12-21 22:43:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:43:51,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2020-12-21 22:43:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:51,967 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:43:51,967 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:43:51,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=972, Invalid=1478, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:43:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:43:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-21 22:43:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 22:43:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-21 22:43:51,971 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-12-21 22:43:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:51,972 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-21 22:43:51,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:43:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-21 22:43:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 22:43:51,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:51,972 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:52,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 22:43:52,173 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-21 22:43:52,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:52,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859207433] [2020-12-21 22:43:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859207433] [2020-12-21 22:43:52,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458119081] [2020-12-21 22:43:52,715 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 [2020-12-21 22:45:02,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 22:45:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:02,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:45:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:03,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:03,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2020-12-21 22:45:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292111878] [2020-12-21 22:45:03,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 22:45:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 22:45:03,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=1602, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:45:03,477 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 52 states. [2020-12-21 22:45:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:03,696 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-21 22:45:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:45:03,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2020-12-21 22:45:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:03,698 INFO L225 Difference]: With dead ends: 68 [2020-12-21 22:45:03,698 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:45:03,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1050, Invalid=1602, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 22:45:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:45:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 22:45:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 22:45:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-21 22:45:03,703 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2020-12-21 22:45:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:03,703 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-21 22:45:03,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 22:45:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-21 22:45:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 22:45:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:03,704 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:03,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:45:03,905 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:03,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2020-12-21 22:45:03,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:03,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575090940] [2020-12-21 22:45:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:04,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575090940] [2020-12-21 22:45:04,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867292194] [2020-12-21 22:45:04,497 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 [2020-12-21 22:45:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 22:45:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:05,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:05,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2020-12-21 22:45:05,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755986002] [2020-12-21 22:45:05,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 22:45:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 22:45:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=1731, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:45:05,339 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 54 states. [2020-12-21 22:45:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:05,494 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-21 22:45:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:45:05,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2020-12-21 22:45:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:05,496 INFO L225 Difference]: With dead ends: 70 [2020-12-21 22:45:05,496 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 22:45:05,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1131, Invalid=1731, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 22:45:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 22:45:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-21 22:45:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 22:45:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-21 22:45:05,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2020-12-21 22:45:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:05,501 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-21 22:45:05,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 22:45:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-21 22:45:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:45:05,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:05,501 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:05,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:45:05,707 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2020-12-21 22:45:05,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:05,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613880713] [2020-12-21 22:45:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613880713] [2020-12-21 22:45:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215786912] [2020-12-21 22:45:06,327 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 [2020-12-21 22:45:06,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:45:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:06,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 22:45:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:07,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-21 22:45:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120092122] [2020-12-21 22:45:07,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 22:45:07,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 22:45:07,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1215, Invalid=1865, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 22:45:07,198 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 56 states. [2020-12-21 22:45:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:07,396 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-21 22:45:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 22:45:07,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2020-12-21 22:45:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:07,397 INFO L225 Difference]: With dead ends: 72 [2020-12-21 22:45:07,398 INFO L226 Difference]: Without dead ends: 65 [2020-12-21 22:45:07,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1215, Invalid=1865, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 22:45:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-21 22:45:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-21 22:45:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:45:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-21 22:45:07,403 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2020-12-21 22:45:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:07,403 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-21 22:45:07,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 22:45:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-21 22:45:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:45:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:07,404 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:07,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:45:07,618 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2020-12-21 22:45:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029711410] [2020-12-21 22:45:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029711410] [2020-12-21 22:45:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960644523] [2020-12-21 22:45:08,271 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 [2020-12-21 22:45:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-21 22:45:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:45:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:50,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:50,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2020-12-21 22:45:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868591850] [2020-12-21 22:45:50,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 22:45:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 22:45:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=2004, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:45:50,649 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 58 states. [2020-12-21 22:45:50,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:50,901 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-12-21 22:45:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:45:50,902 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 61 [2020-12-21 22:45:50,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:50,903 INFO L225 Difference]: With dead ends: 74 [2020-12-21 22:45:50,903 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 22:45:50,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1302, Invalid=2004, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 22:45:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 22:45:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-21 22:45:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:45:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-21 22:45:50,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2020-12-21 22:45:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-21 22:45:50,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 22:45:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-21 22:45:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:45:50,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:50,910 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:51,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:45:51,111 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2020-12-21 22:45:51,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:51,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578146949] [2020-12-21 22:45:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578146949] [2020-12-21 22:45:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318362598] [2020-12-21 22:45:51,847 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 [2020-12-21 22:47:09,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:47:09,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:47:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:10,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:10,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2020-12-21 22:47:10,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391323554] [2020-12-21 22:47:10,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-21 22:47:10,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-21 22:47:10,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1392, Invalid=2148, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 22:47:10,756 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 60 states. [2020-12-21 22:47:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:10,988 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-21 22:47:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 22:47:10,989 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 63 [2020-12-21 22:47:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:10,990 INFO L225 Difference]: With dead ends: 76 [2020-12-21 22:47:10,990 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 22:47:10,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1392, Invalid=2148, Unknown=0, NotChecked=0, Total=3540 [2020-12-21 22:47:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 22:47:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-21 22:47:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 22:47:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-21 22:47:10,996 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2020-12-21 22:47:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:10,996 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-21 22:47:10,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-21 22:47:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-21 22:47:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 22:47:10,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:10,997 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:11,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:47:11,198 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2020-12-21 22:47:11,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:11,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274457513] [2020-12-21 22:47:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274457513] [2020-12-21 22:47:11,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856474966] [2020-12-21 22:47:11,959 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