/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/Problem17_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:21:49,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:21:49,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:21:49,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:21:49,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:21:50,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:21:50,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:21:50,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:21:50,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:21:50,043 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:21:50,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:21:50,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:21:50,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:21:50,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:21:50,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:21:50,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:21:50,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:21:50,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:21:50,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:21:50,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:21:50,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:21:50,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:21:50,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:21:50,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:21:50,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:21:50,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:21:50,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:21:50,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:21:50,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:21:50,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:21:50,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:21:50,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:21:50,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:21:50,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:21:50,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:21:50,453 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:21:50,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2020-12-22 02:21:50,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1452ccc60/265171e7cf0540e487b1f75c72c8f628/FLAG692642733 [2020-12-22 02:21:51,603 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:21:51,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2020-12-22 02:21:51,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1452ccc60/265171e7cf0540e487b1f75c72c8f628/FLAG692642733 [2020-12-22 02:21:52,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1452ccc60/265171e7cf0540e487b1f75c72c8f628 [2020-12-22 02:21:52,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:21:52,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:21:52,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:21:52,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:21:52,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:21:52,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:21:52" (1/1) ... [2020-12-22 02:21:52,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447cd1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:52, skipping insertion in model container [2020-12-22 02:21:52,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:21:52" (1/1) ... [2020-12-22 02:21:52,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:21:52,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:21:52,519 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/Problem17_label06.c[4782,4795] [2020-12-22 02:21:53,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:21:53,289 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:21:53,331 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/Problem17_label06.c[4782,4795] [2020-12-22 02:21:53,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:21:53,835 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:21:53,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53 WrapperNode [2020-12-22 02:21:53,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:21:53,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:21:53,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:21:53,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:21:53,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:53,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:21:54,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:21:54,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:21:54,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:21:54,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (1/1) ... [2020-12-22 02:21:54,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:21:54,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:21:54,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:21:54,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:21:54,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (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 02:21:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:21:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:21:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:21:54,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:21:59,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:21:59,745 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:21:59,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:21:59 BoogieIcfgContainer [2020-12-22 02:21:59,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:21:59,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:21:59,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:21:59,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:21:59,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:21:52" (1/3) ... [2020-12-22 02:21:59,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27038274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:21:59, skipping insertion in model container [2020-12-22 02:21:59,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:53" (2/3) ... [2020-12-22 02:21:59,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27038274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:21:59, skipping insertion in model container [2020-12-22 02:21:59,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:21:59" (3/3) ... [2020-12-22 02:21:59,781 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label06.c [2020-12-22 02:21:59,793 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:21:59,808 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:21:59,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:21:59,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:21:59,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:21:59,880 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:21:59,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:21:59,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:21:59,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:21:59,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:21:59,881 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:21:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:21:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 02:21:59,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:59,932 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, 1, 1, 1, 1, 1] [2020-12-22 02:21:59,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2020-12-22 02:21:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:59,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746875023] [2020-12-22 02:21:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:00,418 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 02:22:00,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746875023] [2020-12-22 02:22:00,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:00,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:22:00,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239819056] [2020-12-22 02:22:00,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:00,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:00,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:00,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:00,452 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:22:05,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:05,366 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2020-12-22 02:22:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:05,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-22 02:22:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:05,421 INFO L225 Difference]: With dead ends: 1667 [2020-12-22 02:22:05,421 INFO L226 Difference]: Without dead ends: 998 [2020-12-22 02:22:05,434 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 02:22:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-12-22 02:22:05,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2020-12-22 02:22:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-12-22 02:22:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2020-12-22 02:22:05,582 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 31 [2020-12-22 02:22:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:05,583 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2020-12-22 02:22:05,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2020-12-22 02:22:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 02:22:05,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:05,588 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, 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] [2020-12-22 02:22:05,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:22:05,588 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1080324021, now seen corresponding path program 1 times [2020-12-22 02:22:05,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:05,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900536913] [2020-12-22 02:22:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:22:05,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900536913] [2020-12-22 02:22:05,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:05,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:22:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281625105] [2020-12-22 02:22:05,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:05,822 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand 3 states. [2020-12-22 02:22:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:10,243 INFO L93 Difference]: Finished difference Result 2840 states and 4882 transitions. [2020-12-22 02:22:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:10,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 02:22:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:10,256 INFO L225 Difference]: With dead ends: 2840 [2020-12-22 02:22:10,257 INFO L226 Difference]: Without dead ends: 1860 [2020-12-22 02:22:10,259 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 02:22:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-12-22 02:22:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1854. [2020-12-22 02:22:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1854 states. [2020-12-22 02:22:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 2759 transitions. [2020-12-22 02:22:10,311 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 2759 transitions. Word has length 96 [2020-12-22 02:22:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:10,312 INFO L481 AbstractCegarLoop]: Abstraction has 1854 states and 2759 transitions. [2020-12-22 02:22:10,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 2759 transitions. [2020-12-22 02:22:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 02:22:10,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:10,317 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, 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] [2020-12-22 02:22:10,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:22:10,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1959550254, now seen corresponding path program 1 times [2020-12-22 02:22:10,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:10,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547196935] [2020-12-22 02:22:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:22:10,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547196935] [2020-12-22 02:22:10,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:10,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:22:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774389337] [2020-12-22 02:22:10,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:10,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:10,464 INFO L87 Difference]: Start difference. First operand 1854 states and 2759 transitions. Second operand 3 states. [2020-12-22 02:22:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:14,286 INFO L93 Difference]: Finished difference Result 5418 states and 8069 transitions. [2020-12-22 02:22:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:14,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 02:22:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:14,306 INFO L225 Difference]: With dead ends: 5418 [2020-12-22 02:22:14,306 INFO L226 Difference]: Without dead ends: 3566 [2020-12-22 02:22:14,309 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 02:22:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2020-12-22 02:22:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3138. [2020-12-22 02:22:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3138 states. [2020-12-22 02:22:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4061 transitions. [2020-12-22 02:22:14,382 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4061 transitions. Word has length 106 [2020-12-22 02:22:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:14,383 INFO L481 AbstractCegarLoop]: Abstraction has 3138 states and 4061 transitions. [2020-12-22 02:22:14,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4061 transitions. [2020-12-22 02:22:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-22 02:22:14,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:14,387 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, 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, 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 02:22:14,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:22:14,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2071979068, now seen corresponding path program 1 times [2020-12-22 02:22:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:14,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004044282] [2020-12-22 02:22:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:22:14,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004044282] [2020-12-22 02:22:14,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:14,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:14,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18916630] [2020-12-22 02:22:14,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:14,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:14,663 INFO L87 Difference]: Start difference. First operand 3138 states and 4061 transitions. Second operand 3 states. [2020-12-22 02:22:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:18,675 INFO L93 Difference]: Finished difference Result 7984 states and 10671 transitions. [2020-12-22 02:22:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:18,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2020-12-22 02:22:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:18,702 INFO L225 Difference]: With dead ends: 7984 [2020-12-22 02:22:18,702 INFO L226 Difference]: Without dead ends: 4848 [2020-12-22 02:22:18,709 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 02:22:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2020-12-22 02:22:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4848. [2020-12-22 02:22:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4848 states. [2020-12-22 02:22:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 6226 transitions. [2020-12-22 02:22:18,817 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 6226 transitions. Word has length 179 [2020-12-22 02:22:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:18,818 INFO L481 AbstractCegarLoop]: Abstraction has 4848 states and 6226 transitions. [2020-12-22 02:22:18,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 6226 transitions. [2020-12-22 02:22:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-22 02:22:18,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:18,821 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:18,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:22:18,821 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:18,822 INFO L82 PathProgramCache]: Analyzing trace with hash 851513907, now seen corresponding path program 1 times [2020-12-22 02:22:18,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:18,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161114648] [2020-12-22 02:22:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 02:22:19,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161114648] [2020-12-22 02:22:19,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:19,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168345169] [2020-12-22 02:22:19,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:19,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:19,143 INFO L87 Difference]: Start difference. First operand 4848 states and 6226 transitions. Second operand 3 states. [2020-12-22 02:22:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:23,838 INFO L93 Difference]: Finished difference Result 13517 states and 17385 transitions. [2020-12-22 02:22:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:23,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2020-12-22 02:22:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:23,882 INFO L225 Difference]: With dead ends: 13517 [2020-12-22 02:22:23,882 INFO L226 Difference]: Without dead ends: 8671 [2020-12-22 02:22:23,891 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 02:22:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8671 states. [2020-12-22 02:22:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8671 to 7395. [2020-12-22 02:22:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7395 states. [2020-12-22 02:22:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7395 states to 7395 states and 9035 transitions. [2020-12-22 02:22:24,139 INFO L78 Accepts]: Start accepts. Automaton has 7395 states and 9035 transitions. Word has length 185 [2020-12-22 02:22:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:24,140 INFO L481 AbstractCegarLoop]: Abstraction has 7395 states and 9035 transitions. [2020-12-22 02:22:24,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7395 states and 9035 transitions. [2020-12-22 02:22:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-22 02:22:24,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:24,144 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:24,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:22:24,144 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1071805537, now seen corresponding path program 1 times [2020-12-22 02:22:24,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:24,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129609654] [2020-12-22 02:22:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:22:24,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129609654] [2020-12-22 02:22:24,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:24,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:24,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533777899] [2020-12-22 02:22:24,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:24,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:24,390 INFO L87 Difference]: Start difference. First operand 7395 states and 9035 transitions. Second operand 3 states. [2020-12-22 02:22:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:29,270 INFO L93 Difference]: Finished difference Result 18619 states and 22991 transitions. [2020-12-22 02:22:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:29,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-12-22 02:22:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:29,327 INFO L225 Difference]: With dead ends: 18619 [2020-12-22 02:22:29,327 INFO L226 Difference]: Without dead ends: 11226 [2020-12-22 02:22:29,339 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 02:22:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2020-12-22 02:22:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 9940. [2020-12-22 02:22:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9940 states. [2020-12-22 02:22:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9940 states to 9940 states and 12127 transitions. [2020-12-22 02:22:29,535 INFO L78 Accepts]: Start accepts. Automaton has 9940 states and 12127 transitions. Word has length 198 [2020-12-22 02:22:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:29,536 INFO L481 AbstractCegarLoop]: Abstraction has 9940 states and 12127 transitions. [2020-12-22 02:22:29,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9940 states and 12127 transitions. [2020-12-22 02:22:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 02:22:29,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:29,541 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:29,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:22:29,542 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 830636259, now seen corresponding path program 1 times [2020-12-22 02:22:29,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:29,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129833266] [2020-12-22 02:22:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:22:29,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129833266] [2020-12-22 02:22:29,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:29,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175407294] [2020-12-22 02:22:29,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:29,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:29,852 INFO L87 Difference]: Start difference. First operand 9940 states and 12127 transitions. Second operand 3 states. [2020-12-22 02:22:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:35,298 INFO L93 Difference]: Finished difference Result 23731 states and 29277 transitions. [2020-12-22 02:22:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:35,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 247 [2020-12-22 02:22:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:35,335 INFO L225 Difference]: With dead ends: 23731 [2020-12-22 02:22:35,336 INFO L226 Difference]: Without dead ends: 12941 [2020-12-22 02:22:35,349 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 02:22:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2020-12-22 02:22:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 12933. [2020-12-22 02:22:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12933 states. [2020-12-22 02:22:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12933 states to 12933 states and 15428 transitions. [2020-12-22 02:22:35,576 INFO L78 Accepts]: Start accepts. Automaton has 12933 states and 15428 transitions. Word has length 247 [2020-12-22 02:22:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:35,577 INFO L481 AbstractCegarLoop]: Abstraction has 12933 states and 15428 transitions. [2020-12-22 02:22:35,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 12933 states and 15428 transitions. [2020-12-22 02:22:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 02:22:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:35,583 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:35,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:22:35,583 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash 571478886, now seen corresponding path program 1 times [2020-12-22 02:22:35,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:35,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567723070] [2020-12-22 02:22:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 02:22:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567723070] [2020-12-22 02:22:35,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950003562] [2020-12-22 02:22:35,994 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 02:22:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:22:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:22:36,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:22:36,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:22:36,739 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:22:36,939 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:22:37,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:22:37,239 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:22:37,364 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:22:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 196 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 02:22:38,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:22:38,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 02:22:38,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133854839] [2020-12-22 02:22:38,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:38,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:38,473 INFO L87 Difference]: Start difference. First operand 12933 states and 15428 transitions. Second operand 4 states. [2020-12-22 02:22:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:46,949 INFO L93 Difference]: Finished difference Result 33104 states and 40012 transitions. [2020-12-22 02:22:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:46,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2020-12-22 02:22:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:46,996 INFO L225 Difference]: With dead ends: 33104 [2020-12-22 02:22:46,997 INFO L226 Difference]: Without dead ends: 19748 [2020-12-22 02:22:47,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19748 states. [2020-12-22 02:22:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19748 to 19743. [2020-12-22 02:22:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19743 states. [2020-12-22 02:22:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19743 states to 19743 states and 22649 transitions. [2020-12-22 02:22:47,452 INFO L78 Accepts]: Start accepts. Automaton has 19743 states and 22649 transitions. Word has length 255 [2020-12-22 02:22:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:47,454 INFO L481 AbstractCegarLoop]: Abstraction has 19743 states and 22649 transitions. [2020-12-22 02:22:47,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19743 states and 22649 transitions. [2020-12-22 02:22:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-12-22 02:22:47,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:47,462 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, 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, 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] [2020-12-22 02:22:47,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 02:22:47,676 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1351221799, now seen corresponding path program 1 times [2020-12-22 02:22:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41169054] [2020-12-22 02:22:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:22:47,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41169054] [2020-12-22 02:22:47,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:47,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:22:47,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402426103] [2020-12-22 02:22:47,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:47,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:47,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:47,975 INFO L87 Difference]: Start difference. First operand 19743 states and 22649 transitions. Second operand 4 states. [2020-12-22 02:22:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:58,250 INFO L93 Difference]: Finished difference Result 52309 states and 60624 transitions. [2020-12-22 02:22:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:58,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 291 [2020-12-22 02:22:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:58,322 INFO L225 Difference]: With dead ends: 52309 [2020-12-22 02:22:58,323 INFO L226 Difference]: Without dead ends: 30859 [2020-12-22 02:22:58,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:22:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30859 states. [2020-12-22 02:22:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30859 to 27838. [2020-12-22 02:22:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27838 states. [2020-12-22 02:22:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27838 states to 27838 states and 31613 transitions. [2020-12-22 02:22:58,773 INFO L78 Accepts]: Start accepts. Automaton has 27838 states and 31613 transitions. Word has length 291 [2020-12-22 02:22:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:58,774 INFO L481 AbstractCegarLoop]: Abstraction has 27838 states and 31613 transitions. [2020-12-22 02:22:58,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 27838 states and 31613 transitions. [2020-12-22 02:22:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-12-22 02:22:58,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:58,790 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, 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, 3, 3, 3, 3, 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] [2020-12-22 02:22:58,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:22:58,793 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1311562389, now seen corresponding path program 1 times [2020-12-22 02:22:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:58,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265487958] [2020-12-22 02:22:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-22 02:22:59,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265487958] [2020-12-22 02:22:59,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:59,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719115779] [2020-12-22 02:22:59,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:59,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:59,324 INFO L87 Difference]: Start difference. First operand 27838 states and 31613 transitions. Second operand 3 states. [2020-12-22 02:23:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:05,267 INFO L93 Difference]: Finished difference Result 65035 states and 74426 transitions. [2020-12-22 02:23:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:23:05,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 359 [2020-12-22 02:23:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:05,345 INFO L225 Difference]: With dead ends: 65035 [2020-12-22 02:23:05,345 INFO L226 Difference]: Without dead ends: 35496 [2020-12-22 02:23:05,449 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 02:23:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35496 states. [2020-12-22 02:23:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35496 to 35068. [2020-12-22 02:23:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35068 states. [2020-12-22 02:23:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35068 states to 35068 states and 38937 transitions. [2020-12-22 02:23:05,937 INFO L78 Accepts]: Start accepts. Automaton has 35068 states and 38937 transitions. Word has length 359 [2020-12-22 02:23:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:05,938 INFO L481 AbstractCegarLoop]: Abstraction has 35068 states and 38937 transitions. [2020-12-22 02:23:05,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:23:05,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35068 states and 38937 transitions. [2020-12-22 02:23:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2020-12-22 02:23:05,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:05,953 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:23:05,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:23:05,954 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash 949518367, now seen corresponding path program 1 times [2020-12-22 02:23:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:05,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114194181] [2020-12-22 02:23:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 02:23:06,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114194181] [2020-12-22 02:23:06,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:06,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:06,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828154687] [2020-12-22 02:23:06,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:06,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:06,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:06,441 INFO L87 Difference]: Start difference. First operand 35068 states and 38937 transitions. Second operand 3 states. [2020-12-22 02:23:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:11,831 INFO L93 Difference]: Finished difference Result 78206 states and 87621 transitions. [2020-12-22 02:23:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:23:11,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 373 [2020-12-22 02:23:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:11,889 INFO L225 Difference]: With dead ends: 78206 [2020-12-22 02:23:11,890 INFO L226 Difference]: Without dead ends: 42290 [2020-12-22 02:23:11,921 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 02:23:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42290 states. [2020-12-22 02:23:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42290 to 33351. [2020-12-22 02:23:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33351 states. [2020-12-22 02:23:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33351 states to 33351 states and 36955 transitions. [2020-12-22 02:23:12,749 INFO L78 Accepts]: Start accepts. Automaton has 33351 states and 36955 transitions. Word has length 373 [2020-12-22 02:23:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:12,750 INFO L481 AbstractCegarLoop]: Abstraction has 33351 states and 36955 transitions. [2020-12-22 02:23:12,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:23:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33351 states and 36955 transitions. [2020-12-22 02:23:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-12-22 02:23:12,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:12,769 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, 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, 3, 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] [2020-12-22 02:23:12,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:23:12,769 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:12,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1352739045, now seen corresponding path program 1 times [2020-12-22 02:23:12,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:12,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300022727] [2020-12-22 02:23:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 02:23:13,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300022727] [2020-12-22 02:23:13,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:13,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435265214] [2020-12-22 02:23:13,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:13,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:13,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:13,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:13,221 INFO L87 Difference]: Start difference. First operand 33351 states and 36955 transitions. Second operand 3 states. [2020-12-22 02:23:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:19,273 INFO L93 Difference]: Finished difference Result 75240 states and 83937 transitions. [2020-12-22 02:23:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:23:19,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 400 [2020-12-22 02:23:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:19,322 INFO L225 Difference]: With dead ends: 75240 [2020-12-22 02:23:19,322 INFO L226 Difference]: Without dead ends: 42316 [2020-12-22 02:23:19,347 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 02:23:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42316 states. [2020-12-22 02:23:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42316 to 40595. [2020-12-22 02:23:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40595 states. [2020-12-22 02:23:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40595 states to 40595 states and 45283 transitions. [2020-12-22 02:23:20,189 INFO L78 Accepts]: Start accepts. Automaton has 40595 states and 45283 transitions. Word has length 400 [2020-12-22 02:23:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:20,190 INFO L481 AbstractCegarLoop]: Abstraction has 40595 states and 45283 transitions. [2020-12-22 02:23:20,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:23:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 40595 states and 45283 transitions. [2020-12-22 02:23:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-12-22 02:23:20,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:20,206 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, 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, 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, 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 02:23:20,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:23:20,206 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2097456585, now seen corresponding path program 1 times [2020-12-22 02:23:20,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:20,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475407277] [2020-12-22 02:23:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-12-22 02:23:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475407277] [2020-12-22 02:23:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237092265] [2020-12-22 02:23:20,940 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 02:23:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:23:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:23:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-22 02:23:21,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:23:21,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2020-12-22 02:23:21,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140461988] [2020-12-22 02:23:21,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:23:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:23:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:23:21,944 INFO L87 Difference]: Start difference. First operand 40595 states and 45283 transitions. Second operand 7 states. [2020-12-22 02:23:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:53,336 INFO L93 Difference]: Finished difference Result 114408 states and 127289 transitions. [2020-12-22 02:23:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 02:23:53,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 411 [2020-12-22 02:23:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:53,411 INFO L225 Difference]: With dead ends: 114408 [2020-12-22 02:23:53,411 INFO L226 Difference]: Without dead ends: 71237 [2020-12-22 02:23:53,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:23:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71237 states. [2020-12-22 02:23:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71237 to 60117. [2020-12-22 02:23:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60117 states. [2020-12-22 02:23:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60117 states to 60117 states and 65691 transitions. [2020-12-22 02:23:54,626 INFO L78 Accepts]: Start accepts. Automaton has 60117 states and 65691 transitions. Word has length 411 [2020-12-22 02:23:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:54,627 INFO L481 AbstractCegarLoop]: Abstraction has 60117 states and 65691 transitions. [2020-12-22 02:23:54,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:23:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 60117 states and 65691 transitions. [2020-12-22 02:23:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-12-22 02:23:54,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:54,646 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:23:54,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 02:23:54,861 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:54,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 500106253, now seen corresponding path program 1 times [2020-12-22 02:23:54,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:54,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506620237] [2020-12-22 02:23:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-22 02:23:55,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506620237] [2020-12-22 02:23:55,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:55,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:55,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937279014] [2020-12-22 02:23:55,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:55,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:55,616 INFO L87 Difference]: Start difference. First operand 60117 states and 65691 transitions. Second operand 3 states. [2020-12-22 02:24:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:02,783 INFO L93 Difference]: Finished difference Result 138115 states and 151440 transitions. [2020-12-22 02:24:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:24:02,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-12-22 02:24:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:03,033 INFO L225 Difference]: With dead ends: 138115 [2020-12-22 02:24:03,033 INFO L226 Difference]: Without dead ends: 77998 [2020-12-22 02:24:03,053 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 02:24:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77998 states. [2020-12-22 02:24:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77998 to 77138. [2020-12-22 02:24:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77138 states. [2020-12-22 02:24:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77138 states to 77138 states and 84055 transitions. [2020-12-22 02:24:04,218 INFO L78 Accepts]: Start accepts. Automaton has 77138 states and 84055 transitions. Word has length 497 [2020-12-22 02:24:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 77138 states and 84055 transitions. [2020-12-22 02:24:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:24:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 77138 states and 84055 transitions. [2020-12-22 02:24:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-12-22 02:24:04,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:04,252 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:24:04,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:24:04,253 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 300395610, now seen corresponding path program 1 times [2020-12-22 02:24:04,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:04,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025121618] [2020-12-22 02:24:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-12-22 02:24:04,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025121618] [2020-12-22 02:24:04,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:24:04,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:24:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857206909] [2020-12-22 02:24:04,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:24:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:24:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:24:04,980 INFO L87 Difference]: Start difference. First operand 77138 states and 84055 transitions. Second operand 3 states. [2020-12-22 02:24:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:13,307 INFO L93 Difference]: Finished difference Result 165773 states and 180647 transitions. [2020-12-22 02:24:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:24:13,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-12-22 02:24:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:13,445 INFO L225 Difference]: With dead ends: 165773 [2020-12-22 02:24:13,445 INFO L226 Difference]: Without dead ends: 89058 [2020-12-22 02:24:13,499 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 02:24:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89058 states. [2020-12-22 02:24:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89058 to 85635. [2020-12-22 02:24:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85635 states. [2020-12-22 02:24:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85635 states to 85635 states and 93335 transitions. [2020-12-22 02:24:14,850 INFO L78 Accepts]: Start accepts. Automaton has 85635 states and 93335 transitions. Word has length 497 [2020-12-22 02:24:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:14,851 INFO L481 AbstractCegarLoop]: Abstraction has 85635 states and 93335 transitions. [2020-12-22 02:24:14,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:24:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 85635 states and 93335 transitions. [2020-12-22 02:24:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-12-22 02:24:14,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:14,867 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, 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, 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] [2020-12-22 02:24:14,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:24:14,867 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1953857705, now seen corresponding path program 1 times [2020-12-22 02:24:14,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:14,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892647683] [2020-12-22 02:24:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:24:15,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892647683] [2020-12-22 02:24:15,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:24:15,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:24:15,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140753637] [2020-12-22 02:24:15,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:24:15,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:24:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:24:15,657 INFO L87 Difference]: Start difference. First operand 85635 states and 93335 transitions. Second operand 3 states. [2020-12-22 02:24:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:22,557 INFO L93 Difference]: Finished difference Result 158916 states and 173068 transitions. [2020-12-22 02:24:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:24:22,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-12-22 02:24:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:22,648 INFO L225 Difference]: With dead ends: 158916 [2020-12-22 02:24:22,648 INFO L226 Difference]: Without dead ends: 74133 [2020-12-22 02:24:22,683 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 02:24:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74133 states. [2020-12-22 02:24:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74133 to 73278. [2020-12-22 02:24:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73278 states. [2020-12-22 02:24:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73278 states to 73278 states and 79132 transitions. [2020-12-22 02:24:24,002 INFO L78 Accepts]: Start accepts. Automaton has 73278 states and 79132 transitions. Word has length 500 [2020-12-22 02:24:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:24,007 INFO L481 AbstractCegarLoop]: Abstraction has 73278 states and 79132 transitions. [2020-12-22 02:24:24,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:24:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 73278 states and 79132 transitions. [2020-12-22 02:24:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-12-22 02:24:24,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:24,038 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, 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, 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] [2020-12-22 02:24:24,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:24:24,040 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1039151023, now seen corresponding path program 1 times [2020-12-22 02:24:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589009449] [2020-12-22 02:24:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:24:24,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589009449] [2020-12-22 02:24:24,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:24:24,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:24:24,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61011269] [2020-12-22 02:24:24,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:24:24,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:24:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:24:24,803 INFO L87 Difference]: Start difference. First operand 73278 states and 79132 transitions. Second operand 3 states. [2020-12-22 02:24:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:32,346 INFO L93 Difference]: Finished difference Result 152535 states and 164871 transitions. [2020-12-22 02:24:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:24:32,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 527 [2020-12-22 02:24:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:32,446 INFO L225 Difference]: With dead ends: 152535 [2020-12-22 02:24:32,446 INFO L226 Difference]: Without dead ends: 79683 [2020-12-22 02:24:32,477 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 02:24:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79683 states. [2020-12-22 02:24:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79683 to 73277. [2020-12-22 02:24:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73277 states. [2020-12-22 02:24:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73277 states to 73277 states and 78788 transitions. [2020-12-22 02:24:33,833 INFO L78 Accepts]: Start accepts. Automaton has 73277 states and 78788 transitions. Word has length 527 [2020-12-22 02:24:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:33,834 INFO L481 AbstractCegarLoop]: Abstraction has 73277 states and 78788 transitions. [2020-12-22 02:24:33,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:24:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 73277 states and 78788 transitions. [2020-12-22 02:24:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-12-22 02:24:33,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:33,854 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 02:24:33,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:24:33,855 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1528915042, now seen corresponding path program 1 times [2020-12-22 02:24:33,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:33,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803192327] [2020-12-22 02:24:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 698 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 02:24:34,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803192327] [2020-12-22 02:24:34,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:24:34,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:24:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045813511] [2020-12-22 02:24:34,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:24:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:24:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:24:34,705 INFO L87 Difference]: Start difference. First operand 73277 states and 78788 transitions. Second operand 4 states. [2020-12-22 02:24:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:48,786 INFO L93 Difference]: Finished difference Result 172960 states and 186177 transitions. [2020-12-22 02:24:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:24:48,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 557 [2020-12-22 02:24:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:48,955 INFO L225 Difference]: With dead ends: 172960 [2020-12-22 02:24:48,955 INFO L226 Difference]: Without dead ends: 100110 [2020-12-22 02:24:49,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:24:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100110 states. [2020-12-22 02:24:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100110 to 86911. [2020-12-22 02:24:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86911 states. [2020-12-22 02:24:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86911 states to 86911 states and 93419 transitions. [2020-12-22 02:24:50,532 INFO L78 Accepts]: Start accepts. Automaton has 86911 states and 93419 transitions. Word has length 557 [2020-12-22 02:24:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:50,536 INFO L481 AbstractCegarLoop]: Abstraction has 86911 states and 93419 transitions. [2020-12-22 02:24:50,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:24:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 86911 states and 93419 transitions. [2020-12-22 02:24:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2020-12-22 02:24:50,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:50,571 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, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:50,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:24:50,572 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1481817610, now seen corresponding path program 1 times [2020-12-22 02:24:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:50,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315009818] [2020-12-22 02:24:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2020-12-22 02:24:51,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315009818] [2020-12-22 02:24:51,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:24:51,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:24:51,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463282356] [2020-12-22 02:24:51,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:24:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:51,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:24:51,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:24:51,347 INFO L87 Difference]: Start difference. First operand 86911 states and 93419 transitions. Second operand 4 states. [2020-12-22 02:25:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:25:03,558 INFO L93 Difference]: Finished difference Result 213432 states and 229563 transitions. [2020-12-22 02:25:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:25:03,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 571 [2020-12-22 02:25:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:25:03,763 INFO L225 Difference]: With dead ends: 213432 [2020-12-22 02:25:03,763 INFO L226 Difference]: Without dead ends: 127373 [2020-12-22 02:25:03,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:25:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127373 states. [2020-12-22 02:25:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127373 to 108634. [2020-12-22 02:25:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108634 states. [2020-12-22 02:25:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108634 states to 108634 states and 116353 transitions. [2020-12-22 02:25:05,575 INFO L78 Accepts]: Start accepts. Automaton has 108634 states and 116353 transitions. Word has length 571 [2020-12-22 02:25:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:25:05,576 INFO L481 AbstractCegarLoop]: Abstraction has 108634 states and 116353 transitions. [2020-12-22 02:25:05,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:25:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 108634 states and 116353 transitions. [2020-12-22 02:25:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2020-12-22 02:25:05,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:25:05,587 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:25:05,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:25:05,588 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:25:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:25:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1255310396, now seen corresponding path program 1 times [2020-12-22 02:25:05,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:25:05,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548459822] [2020-12-22 02:25:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:25:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:25:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 506 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-12-22 02:25:06,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548459822] [2020-12-22 02:25:06,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:25:06,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:25:06,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447547675] [2020-12-22 02:25:06,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:25:06,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:25:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:25:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:25:06,558 INFO L87 Difference]: Start difference. First operand 108634 states and 116353 transitions. Second operand 4 states. [2020-12-22 02:25:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:25:18,608 INFO L93 Difference]: Finished difference Result 233903 states and 250263 transitions. [2020-12-22 02:25:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:25:18,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 584 [2020-12-22 02:25:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:25:18,760 INFO L225 Difference]: With dead ends: 233903 [2020-12-22 02:25:18,760 INFO L226 Difference]: Without dead ends: 126971 [2020-12-22 02:25:18,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:25:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126971 states. [2020-12-22 02:25:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126971 to 114165. [2020-12-22 02:25:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114165 states. [2020-12-22 02:25:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114165 states to 114165 states and 122192 transitions. [2020-12-22 02:25:21,203 INFO L78 Accepts]: Start accepts. Automaton has 114165 states and 122192 transitions. Word has length 584 [2020-12-22 02:25:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:25:21,204 INFO L481 AbstractCegarLoop]: Abstraction has 114165 states and 122192 transitions. [2020-12-22 02:25:21,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:25:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 114165 states and 122192 transitions. [2020-12-22 02:25:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2020-12-22 02:25:21,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:25:21,236 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, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:25:21,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:25:21,236 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:25:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:25:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1606148972, now seen corresponding path program 1 times [2020-12-22 02:25:21,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:25:21,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171917252] [2020-12-22 02:25:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:25:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:25:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 767 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 02:25:22,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171917252] [2020-12-22 02:25:22,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:25:22,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:25:22,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081385442] [2020-12-22 02:25:22,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:25:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:25:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:25:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:25:22,297 INFO L87 Difference]: Start difference. First operand 114165 states and 122192 transitions. Second operand 3 states. [2020-12-22 02:25:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:25:30,131 INFO L93 Difference]: Finished difference Result 238573 states and 255623 transitions. [2020-12-22 02:25:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:25:30,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 599 [2020-12-22 02:25:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:25:30,311 INFO L225 Difference]: With dead ends: 238573 [2020-12-22 02:25:30,311 INFO L226 Difference]: Without dead ends: 125685 [2020-12-22 02:25:30,382 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 02:25:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125685 states. [2020-12-22 02:25:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125685 to 122253. [2020-12-22 02:25:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122253 states. [2020-12-22 02:25:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122253 states to 122253 states and 130807 transitions. [2020-12-22 02:25:32,177 INFO L78 Accepts]: Start accepts. Automaton has 122253 states and 130807 transitions. Word has length 599 [2020-12-22 02:25:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:25:32,177 INFO L481 AbstractCegarLoop]: Abstraction has 122253 states and 130807 transitions. [2020-12-22 02:25:32,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:25:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 122253 states and 130807 transitions. [2020-12-22 02:25:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-12-22 02:25:32,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:25:32,196 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 3, 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] [2020-12-22 02:25:32,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:25:32,196 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:25:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:25:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1623756611, now seen corresponding path program 1 times [2020-12-22 02:25:32,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:25:32,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449465936] [2020-12-22 02:25:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:25:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:25:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1359 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2020-12-22 02:25:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449465936] [2020-12-22 02:25:33,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:25:33,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:25:33,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977572640] [2020-12-22 02:25:33,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:25:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:25:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:25:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:25:33,288 INFO L87 Difference]: Start difference. First operand 122253 states and 130807 transitions. Second operand 3 states.