/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/eca-rers2012/Problem12_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:31:03,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:31:03,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:31:03,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:31:03,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:31:03,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:31:03,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:31:03,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:31:03,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:31:03,383 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:31:03,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:31:03,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:31:03,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:31:03,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:31:03,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:31:03,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:31:03,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:31:03,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:31:03,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:31:03,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:31:03,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:31:03,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:31:03,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:31:03,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:31:03,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:31:03,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:31:03,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:31:03,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:31:03,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:31:03,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:31:03,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:31:03,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:31:03,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:31:03,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:31:03,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:31:03,967 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:31:03,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label42.c [2020-12-22 01:31:04,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3637f53b/47a6a8fae9464d89afdf44e1e126a63d/FLAG51b29f8bb [2020-12-22 01:31:05,181 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:31:05,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label42.c [2020-12-22 01:31:05,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3637f53b/47a6a8fae9464d89afdf44e1e126a63d/FLAG51b29f8bb [2020-12-22 01:31:05,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3637f53b/47a6a8fae9464d89afdf44e1e126a63d [2020-12-22 01:31:05,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:31:05,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:31:05,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:31:05,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:31:05,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:31:05,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:05" (1/1) ... [2020-12-22 01:31:05,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d861f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:05, skipping insertion in model container [2020-12-22 01:31:05,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:31:05" (1/1) ... [2020-12-22 01:31:05,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:31:05,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:31:06,252 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/eca-rers2012/Problem12_label42.c[3554,3567] [2020-12-22 01:31:07,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:31:07,406 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:31:07,464 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/eca-rers2012/Problem12_label42.c[3554,3567] [2020-12-22 01:31:08,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:31:08,415 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:31:08,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08 WrapperNode [2020-12-22 01:31:08,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:31:08,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:31:08,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:31:08,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:31:08,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:08,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:31:09,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:31:09,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:31:09,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:31:09,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... [2020-12-22 01:31:09,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:31:09,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:31:09,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:31:09,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:31:09,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:31:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:31:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:31:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:31:10,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:31:16,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:31:16,436 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:31:16,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:16 BoogieIcfgContainer [2020-12-22 01:31:16,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:31:16,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:31:16,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:31:16,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:31:16,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:31:05" (1/3) ... [2020-12-22 01:31:16,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7f7b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:16, skipping insertion in model container [2020-12-22 01:31:16,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:31:08" (2/3) ... [2020-12-22 01:31:16,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7f7b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:31:16, skipping insertion in model container [2020-12-22 01:31:16,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:31:16" (3/3) ... [2020-12-22 01:31:16,458 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label42.c [2020-12-22 01:31:16,469 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:31:16,479 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:31:16,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:31:16,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:31:16,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:31:16,591 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:31:16,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:31:16,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:31:16,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:31:16,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:31:16,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:31:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2020-12-22 01:31:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 01:31:16,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:16,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:16,653 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2020-12-22 01:31:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:16,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447009421] [2020-12-22 01:31:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:17,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447009421] [2020-12-22 01:31:17,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:17,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:31:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667467322] [2020-12-22 01:31:17,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:17,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:17,032 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 3 states. [2020-12-22 01:31:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:23,628 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2020-12-22 01:31:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:23,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 01:31:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:23,676 INFO L225 Difference]: With dead ends: 2388 [2020-12-22 01:31:23,677 INFO L226 Difference]: Without dead ends: 1506 [2020-12-22 01:31:23,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-12-22 01:31:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2020-12-22 01:31:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-12-22 01:31:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2020-12-22 01:31:23,841 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 26 [2020-12-22 01:31:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:23,842 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2020-12-22 01:31:23,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2020-12-22 01:31:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 01:31:23,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:23,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:23,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:31:23,850 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1299952631, now seen corresponding path program 1 times [2020-12-22 01:31:23,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:23,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406915209] [2020-12-22 01:31:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:24,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406915209] [2020-12-22 01:31:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383717098] [2020-12-22 01:31:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:31:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:31:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:31:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:24,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:31:24,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 01:31:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675875918] [2020-12-22 01:31:24,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:31:24,743 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand 3 states. [2020-12-22 01:31:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:31,635 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2020-12-22 01:31:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:31,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 01:31:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:31,657 INFO L225 Difference]: With dead ends: 4512 [2020-12-22 01:31:31,657 INFO L226 Difference]: Without dead ends: 3008 [2020-12-22 01:31:31,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:31:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2020-12-22 01:31:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2020-12-22 01:31:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-12-22 01:31:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4286 transitions. [2020-12-22 01:31:31,756 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4286 transitions. Word has length 97 [2020-12-22 01:31:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:31,757 INFO L481 AbstractCegarLoop]: Abstraction has 3008 states and 4286 transitions. [2020-12-22 01:31:31,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4286 transitions. [2020-12-22 01:31:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 01:31:31,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:31,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:31,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 01:31:31,979 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2042290817, now seen corresponding path program 1 times [2020-12-22 01:31:31,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:31,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416450706] [2020-12-22 01:31:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:32,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416450706] [2020-12-22 01:31:32,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:32,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:31:32,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434186409] [2020-12-22 01:31:32,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:32,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:32,206 INFO L87 Difference]: Start difference. First operand 3008 states and 4286 transitions. Second operand 3 states. [2020-12-22 01:31:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:38,893 INFO L93 Difference]: Finished difference Result 9018 states and 12853 transitions. [2020-12-22 01:31:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:38,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 01:31:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:38,930 INFO L225 Difference]: With dead ends: 9018 [2020-12-22 01:31:38,931 INFO L226 Difference]: Without dead ends: 6012 [2020-12-22 01:31:38,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2020-12-22 01:31:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6012. [2020-12-22 01:31:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6012 states. [2020-12-22 01:31:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7783 transitions. [2020-12-22 01:31:39,159 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7783 transitions. Word has length 101 [2020-12-22 01:31:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:39,163 INFO L481 AbstractCegarLoop]: Abstraction has 6012 states and 7783 transitions. [2020-12-22 01:31:39,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7783 transitions. [2020-12-22 01:31:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 01:31:39,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:39,176 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:39,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:31:39,177 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:39,178 INFO L82 PathProgramCache]: Analyzing trace with hash 806282672, now seen corresponding path program 1 times [2020-12-22 01:31:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:39,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878084735] [2020-12-22 01:31:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:39,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878084735] [2020-12-22 01:31:39,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:39,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:31:39,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68267199] [2020-12-22 01:31:39,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:39,369 INFO L87 Difference]: Start difference. First operand 6012 states and 7783 transitions. Second operand 3 states. [2020-12-22 01:31:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:46,388 INFO L93 Difference]: Finished difference Result 18032 states and 23345 transitions. [2020-12-22 01:31:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:46,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2020-12-22 01:31:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:46,448 INFO L225 Difference]: With dead ends: 18032 [2020-12-22 01:31:46,448 INFO L226 Difference]: Without dead ends: 12022 [2020-12-22 01:31:46,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12022 states. [2020-12-22 01:31:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12022 to 11269. [2020-12-22 01:31:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11269 states. [2020-12-22 01:31:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13834 transitions. [2020-12-22 01:31:46,710 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13834 transitions. Word has length 107 [2020-12-22 01:31:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:46,714 INFO L481 AbstractCegarLoop]: Abstraction has 11269 states and 13834 transitions. [2020-12-22 01:31:46,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13834 transitions. [2020-12-22 01:31:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 01:31:46,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:46,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:46,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:31:46,723 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash 386435214, now seen corresponding path program 1 times [2020-12-22 01:31:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:46,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804460311] [2020-12-22 01:31:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:47,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804460311] [2020-12-22 01:31:47,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:47,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:31:47,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088244947] [2020-12-22 01:31:47,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:31:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:47,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:31:47,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:31:47,121 INFO L87 Difference]: Start difference. First operand 11269 states and 13834 transitions. Second operand 5 states. [2020-12-22 01:32:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:02,463 INFO L93 Difference]: Finished difference Result 29295 states and 35079 transitions. [2020-12-22 01:32:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:32:02,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-12-22 01:32:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:02,541 INFO L225 Difference]: With dead ends: 29295 [2020-12-22 01:32:02,542 INFO L226 Difference]: Without dead ends: 18028 [2020-12-22 01:32:02,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:32:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2020-12-22 01:32:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 16526. [2020-12-22 01:32:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16526 states. [2020-12-22 01:32:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19409 transitions. [2020-12-22 01:32:02,909 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19409 transitions. Word has length 170 [2020-12-22 01:32:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:02,910 INFO L481 AbstractCegarLoop]: Abstraction has 16526 states and 19409 transitions. [2020-12-22 01:32:02,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:32:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19409 transitions. [2020-12-22 01:32:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 01:32:02,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:02,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:02,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:32:02,917 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash 49564861, now seen corresponding path program 1 times [2020-12-22 01:32:02,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:02,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39595418] [2020-12-22 01:32:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:32:03,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39595418] [2020-12-22 01:32:03,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:03,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820355376] [2020-12-22 01:32:03,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:32:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:03,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:32:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:32:03,400 INFO L87 Difference]: Start difference. First operand 16526 states and 19409 transitions. Second operand 4 states. [2020-12-22 01:32:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:11,454 INFO L93 Difference]: Finished difference Result 37593 states and 43653 transitions. [2020-12-22 01:32:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:32:11,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2020-12-22 01:32:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:11,510 INFO L225 Difference]: With dead ends: 37593 [2020-12-22 01:32:11,511 INFO L226 Difference]: Without dead ends: 21032 [2020-12-22 01:32:11,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:32:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2020-12-22 01:32:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21032. [2020-12-22 01:32:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21032 states. [2020-12-22 01:32:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 23987 transitions. [2020-12-22 01:32:11,940 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 23987 transitions. Word has length 241 [2020-12-22 01:32:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:11,940 INFO L481 AbstractCegarLoop]: Abstraction has 21032 states and 23987 transitions. [2020-12-22 01:32:11,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:32:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 23987 transitions. [2020-12-22 01:32:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 01:32:11,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:11,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:11,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:32:11,949 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 705019238, now seen corresponding path program 1 times [2020-12-22 01:32:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:11,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674265581] [2020-12-22 01:32:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:32:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674265581] [2020-12-22 01:32:12,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:12,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435085536] [2020-12-22 01:32:12,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:12,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:12,233 INFO L87 Difference]: Start difference. First operand 21032 states and 23987 transitions. Second operand 3 states. [2020-12-22 01:32:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:21,791 INFO L93 Difference]: Finished difference Result 60086 states and 68807 transitions. [2020-12-22 01:32:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:21,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2020-12-22 01:32:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:21,868 INFO L225 Difference]: With dead ends: 60086 [2020-12-22 01:32:21,869 INFO L226 Difference]: Without dead ends: 39056 [2020-12-22 01:32:21,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39056 states. [2020-12-22 01:32:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39056 to 35301. [2020-12-22 01:32:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35301 states. [2020-12-22 01:32:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 40149 transitions. [2020-12-22 01:32:22,555 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 40149 transitions. Word has length 252 [2020-12-22 01:32:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:22,555 INFO L481 AbstractCegarLoop]: Abstraction has 35301 states and 40149 transitions. [2020-12-22 01:32:22,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 40149 transitions. [2020-12-22 01:32:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 01:32:22,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:22,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:22,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:32:22,562 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1969121712, now seen corresponding path program 1 times [2020-12-22 01:32:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:22,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145228070] [2020-12-22 01:32:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 01:32:22,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145228070] [2020-12-22 01:32:22,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:22,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:22,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121816648] [2020-12-22 01:32:22,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:22,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:22,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:22,753 INFO L87 Difference]: Start difference. First operand 35301 states and 40149 transitions. Second operand 3 states. [2020-12-22 01:32:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:33,116 INFO L93 Difference]: Finished difference Result 83367 states and 95638 transitions. [2020-12-22 01:32:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:33,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-22 01:32:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:33,238 INFO L225 Difference]: With dead ends: 83367 [2020-12-22 01:32:33,238 INFO L226 Difference]: Without dead ends: 48068 [2020-12-22 01:32:33,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48068 states. [2020-12-22 01:32:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48068 to 47317. [2020-12-22 01:32:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47317 states. [2020-12-22 01:32:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47317 states to 47317 states and 53937 transitions. [2020-12-22 01:32:34,551 INFO L78 Accepts]: Start accepts. Automaton has 47317 states and 53937 transitions. Word has length 256 [2020-12-22 01:32:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:34,552 INFO L481 AbstractCegarLoop]: Abstraction has 47317 states and 53937 transitions. [2020-12-22 01:32:34,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 47317 states and 53937 transitions. [2020-12-22 01:32:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-12-22 01:32:34,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:34,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:34,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:32:34,562 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1157915934, now seen corresponding path program 1 times [2020-12-22 01:32:34,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:34,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405732461] [2020-12-22 01:32:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-22 01:32:35,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405732461] [2020-12-22 01:32:35,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:35,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:35,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603856637] [2020-12-22 01:32:35,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:35,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:35,075 INFO L87 Difference]: Start difference. First operand 47317 states and 53937 transitions. Second operand 3 states. [2020-12-22 01:32:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:43,034 INFO L93 Difference]: Finished difference Result 109652 states and 124147 transitions. [2020-12-22 01:32:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:43,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2020-12-22 01:32:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:43,134 INFO L225 Difference]: With dead ends: 109652 [2020-12-22 01:32:43,134 INFO L226 Difference]: Without dead ends: 60835 [2020-12-22 01:32:43,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2020-12-22 01:32:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 55578. [2020-12-22 01:32:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55578 states. [2020-12-22 01:32:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 61867 transitions. [2020-12-22 01:32:44,479 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 61867 transitions. Word has length 303 [2020-12-22 01:32:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:44,480 INFO L481 AbstractCegarLoop]: Abstraction has 55578 states and 61867 transitions. [2020-12-22 01:32:44,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 61867 transitions. [2020-12-22 01:32:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2020-12-22 01:32:44,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:44,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:44,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:32:44,510 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1680370993, now seen corresponding path program 1 times [2020-12-22 01:32:44,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:44,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118061594] [2020-12-22 01:32:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 632 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-22 01:32:45,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118061594] [2020-12-22 01:32:45,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:45,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:45,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981135426] [2020-12-22 01:32:45,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:45,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:45,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:45,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:45,240 INFO L87 Difference]: Start difference. First operand 55578 states and 61867 transitions. Second operand 3 states. [2020-12-22 01:32:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:54,159 INFO L93 Difference]: Finished difference Result 114909 states and 127541 transitions. [2020-12-22 01:32:54,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:54,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 526 [2020-12-22 01:32:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:54,233 INFO L225 Difference]: With dead ends: 114909 [2020-12-22 01:32:54,233 INFO L226 Difference]: Without dead ends: 59333 [2020-12-22 01:32:54,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59333 states. [2020-12-22 01:32:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59333 to 55578. [2020-12-22 01:32:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55578 states. [2020-12-22 01:32:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 61622 transitions. [2020-12-22 01:32:55,595 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 61622 transitions. Word has length 526 [2020-12-22 01:32:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:55,596 INFO L481 AbstractCegarLoop]: Abstraction has 55578 states and 61622 transitions. [2020-12-22 01:32:55,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 61622 transitions. [2020-12-22 01:32:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-12-22 01:32:55,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:55,656 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:55,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:32:55,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1130215291, now seen corresponding path program 1 times [2020-12-22 01:32:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:55,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968581150] [2020-12-22 01:32:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-22 01:32:56,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968581150] [2020-12-22 01:32:56,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:56,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:56,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741891374] [2020-12-22 01:32:56,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:56,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:56,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:56,273 INFO L87 Difference]: Start difference. First operand 55578 states and 61622 transitions. Second operand 3 states. [2020-12-22 01:33:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:33:06,425 INFO L93 Difference]: Finished difference Result 128427 states and 144153 transitions. [2020-12-22 01:33:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:33:06,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 534 [2020-12-22 01:33:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:33:06,551 INFO L225 Difference]: With dead ends: 128427 [2020-12-22 01:33:06,552 INFO L226 Difference]: Without dead ends: 72851 [2020-12-22 01:33:06,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72851 states. [2020-12-22 01:33:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72851 to 70598. [2020-12-22 01:33:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70598 states. [2020-12-22 01:33:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 78038 transitions. [2020-12-22 01:33:07,699 INFO L78 Accepts]: Start accepts. Automaton has 70598 states and 78038 transitions. Word has length 534 [2020-12-22 01:33:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:33:07,700 INFO L481 AbstractCegarLoop]: Abstraction has 70598 states and 78038 transitions. [2020-12-22 01:33:07,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:33:07,701 INFO L276 IsEmpty]: Start isEmpty. Operand 70598 states and 78038 transitions. [2020-12-22 01:33:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-12-22 01:33:07,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:33:07,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:33:07,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:33:07,722 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:33:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:33:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1345673073, now seen corresponding path program 1 times [2020-12-22 01:33:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:33:07,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531241883] [2020-12-22 01:33:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:33:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:33:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 650 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-22 01:33:08,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531241883] [2020-12-22 01:33:08,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:33:08,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:33:08,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275463171] [2020-12-22 01:33:08,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:33:08,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:33:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:33:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:08,577 INFO L87 Difference]: Start difference. First operand 70598 states and 78038 transitions. Second operand 3 states. [2020-12-22 01:33:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:33:18,783 INFO L93 Difference]: Finished difference Result 167479 states and 186854 transitions. [2020-12-22 01:33:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:33:18,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 537 [2020-12-22 01:33:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:33:18,908 INFO L225 Difference]: With dead ends: 167479 [2020-12-22 01:33:18,909 INFO L226 Difference]: Without dead ends: 96883 [2020-12-22 01:33:18,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96883 states. [2020-12-22 01:33:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96883 to 90124. [2020-12-22 01:33:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90124 states. [2020-12-22 01:33:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90124 states to 90124 states and 99217 transitions. [2020-12-22 01:33:20,729 INFO L78 Accepts]: Start accepts. Automaton has 90124 states and 99217 transitions. Word has length 537 [2020-12-22 01:33:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:33:20,730 INFO L481 AbstractCegarLoop]: Abstraction has 90124 states and 99217 transitions. [2020-12-22 01:33:20,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:33:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 90124 states and 99217 transitions. [2020-12-22 01:33:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-12-22 01:33:20,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:33:20,751 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:33:20,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:33:20,751 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:33:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:33:20,752 INFO L82 PathProgramCache]: Analyzing trace with hash 31906431, now seen corresponding path program 1 times [2020-12-22 01:33:20,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:33:20,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262409638] [2020-12-22 01:33:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:33:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:33:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-22 01:33:21,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262409638] [2020-12-22 01:33:21,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:33:21,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:33:21,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127169157] [2020-12-22 01:33:21,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:33:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:33:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:33:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:21,445 INFO L87 Difference]: Start difference. First operand 90124 states and 99217 transitions. Second operand 3 states. [2020-12-22 01:33:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:33:31,154 INFO L93 Difference]: Finished difference Result 184752 states and 203006 transitions. [2020-12-22 01:33:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:33:31,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 546 [2020-12-22 01:33:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:33:31,268 INFO L225 Difference]: With dead ends: 184752 [2020-12-22 01:33:31,268 INFO L226 Difference]: Without dead ends: 93879 [2020-12-22 01:33:31,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93879 states. [2020-12-22 01:33:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93879 to 89373. [2020-12-22 01:33:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89373 states. [2020-12-22 01:33:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89373 states to 89373 states and 97038 transitions. [2020-12-22 01:33:33,242 INFO L78 Accepts]: Start accepts. Automaton has 89373 states and 97038 transitions. Word has length 546 [2020-12-22 01:33:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:33:33,243 INFO L481 AbstractCegarLoop]: Abstraction has 89373 states and 97038 transitions. [2020-12-22 01:33:33,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:33:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 89373 states and 97038 transitions. [2020-12-22 01:33:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2020-12-22 01:33:33,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:33:33,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:33:33,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:33:33,262 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:33:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:33:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 959601126, now seen corresponding path program 1 times [2020-12-22 01:33:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:33:33,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112829714] [2020-12-22 01:33:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:33:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:33:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 488 proven. 257 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 01:33:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112829714] [2020-12-22 01:33:34,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350570344] [2020-12-22 01:33:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:33:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:33:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:33:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:33:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2020-12-22 01:33:36,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:33:36,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 01:33:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516871672] [2020-12-22 01:33:36,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:33:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:33:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:33:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:33:36,539 INFO L87 Difference]: Start difference. First operand 89373 states and 97038 transitions. Second operand 3 states. [2020-12-22 01:33:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:33:48,137 INFO L93 Difference]: Finished difference Result 196017 states and 214080 transitions. [2020-12-22 01:33:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:33:48,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 564 [2020-12-22 01:33:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:33:48,318 INFO L225 Difference]: With dead ends: 196017 [2020-12-22 01:33:48,318 INFO L226 Difference]: Without dead ends: 107397 [2020-12-22 01:33:48,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:33:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107397 states. [2020-12-22 01:33:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107397 to 105895. [2020-12-22 01:33:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105895 states. [2020-12-22 01:33:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105895 states to 105895 states and 114541 transitions. [2020-12-22 01:33:50,327 INFO L78 Accepts]: Start accepts. Automaton has 105895 states and 114541 transitions. Word has length 564 [2020-12-22 01:33:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:33:50,343 INFO L481 AbstractCegarLoop]: Abstraction has 105895 states and 114541 transitions. [2020-12-22 01:33:50,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:33:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 105895 states and 114541 transitions. [2020-12-22 01:33:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-12-22 01:33:50,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:33:50,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:33:50,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 01:33:50,628 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:33:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:33:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1676105698, now seen corresponding path program 1 times [2020-12-22 01:33:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:33:50,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102977230] [2020-12-22 01:33:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:33:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:33:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-22 01:33:51,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102977230] [2020-12-22 01:33:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:33:51,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:33:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786521619] [2020-12-22 01:33:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:33:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:33:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:33:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:33:51,793 INFO L87 Difference]: Start difference. First operand 105895 states and 114541 transitions. Second operand 3 states. [2020-12-22 01:34:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:03,167 INFO L93 Difference]: Finished difference Result 238073 states and 258909 transitions. [2020-12-22 01:34:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:34:03,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 779 [2020-12-22 01:34:03,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:03,690 INFO L225 Difference]: With dead ends: 238073 [2020-12-22 01:34:03,690 INFO L226 Difference]: Without dead ends: 132931 [2020-12-22 01:34:03,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132931 states. [2020-12-22 01:34:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132931 to 131429. [2020-12-22 01:34:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131429 states. [2020-12-22 01:34:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131429 states to 131429 states and 140823 transitions. [2020-12-22 01:34:06,174 INFO L78 Accepts]: Start accepts. Automaton has 131429 states and 140823 transitions. Word has length 779 [2020-12-22 01:34:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:06,175 INFO L481 AbstractCegarLoop]: Abstraction has 131429 states and 140823 transitions. [2020-12-22 01:34:06,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:34:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 131429 states and 140823 transitions. [2020-12-22 01:34:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2020-12-22 01:34:06,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:06,238 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:34:06,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 01:34:06,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:06,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1402922215, now seen corresponding path program 1 times [2020-12-22 01:34:06,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:06,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560196447] [2020-12-22 01:34:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-12-22 01:34:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560196447] [2020-12-22 01:34:07,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:07,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:07,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063329676] [2020-12-22 01:34:07,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:34:07,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:34:07,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:07,331 INFO L87 Difference]: Start difference. First operand 131429 states and 140823 transitions. Second operand 3 states. [2020-12-22 01:34:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:20,737 INFO L93 Difference]: Finished difference Result 271868 states and 290893 transitions. [2020-12-22 01:34:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:34:20,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 861 [2020-12-22 01:34:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:20,985 INFO L225 Difference]: With dead ends: 271868 [2020-12-22 01:34:20,985 INFO L226 Difference]: Without dead ends: 141192 [2020-12-22 01:34:21,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141192 states. [2020-12-22 01:34:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141192 to 134433. [2020-12-22 01:34:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134433 states. [2020-12-22 01:34:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134433 states to 134433 states and 143256 transitions. [2020-12-22 01:34:23,584 INFO L78 Accepts]: Start accepts. Automaton has 134433 states and 143256 transitions. Word has length 861 [2020-12-22 01:34:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:23,584 INFO L481 AbstractCegarLoop]: Abstraction has 134433 states and 143256 transitions. [2020-12-22 01:34:23,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:34:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 134433 states and 143256 transitions. [2020-12-22 01:34:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 875 [2020-12-22 01:34:23,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:23,659 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:34:23,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 01:34:23,660 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1574948563, now seen corresponding path program 1 times [2020-12-22 01:34:23,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954092684] [2020-12-22 01:34:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2020-12-22 01:34:24,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954092684] [2020-12-22 01:34:24,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:34:24,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:34:24,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093799977] [2020-12-22 01:34:24,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:34:24,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:34:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:34:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:24,978 INFO L87 Difference]: Start difference. First operand 134433 states and 143256 transitions. Second operand 3 states. [2020-12-22 01:34:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:34:40,161 INFO L93 Difference]: Finished difference Result 307916 states and 329361 transitions. [2020-12-22 01:34:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:34:40,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 874 [2020-12-22 01:34:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:34:40,443 INFO L225 Difference]: With dead ends: 307916 [2020-12-22 01:34:40,443 INFO L226 Difference]: Without dead ends: 174236 [2020-12-22 01:34:40,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:34:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174236 states. [2020-12-22 01:34:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174236 to 170481. [2020-12-22 01:34:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170481 states. [2020-12-22 01:34:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170481 states to 170481 states and 181663 transitions. [2020-12-22 01:34:44,138 INFO L78 Accepts]: Start accepts. Automaton has 170481 states and 181663 transitions. Word has length 874 [2020-12-22 01:34:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:34:44,139 INFO L481 AbstractCegarLoop]: Abstraction has 170481 states and 181663 transitions. [2020-12-22 01:34:44,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:34:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 170481 states and 181663 transitions. [2020-12-22 01:34:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2020-12-22 01:34:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:34:44,217 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:34:44,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 01:34:44,218 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:34:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:34:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1104956655, now seen corresponding path program 1 times [2020-12-22 01:34:44,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:34:44,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511786097] [2020-12-22 01:34:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:34:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 517 proven. 257 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 01:34:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511786097] [2020-12-22 01:34:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798702923] [2020-12-22 01:34:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:34:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:34:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:34:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates...