/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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:29:20,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:29:20,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:29:20,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:29:20,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:29:20,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:29:20,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:29:20,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:29:20,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:29:20,346 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:29:20,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:29:20,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:29:20,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:29:20,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:29:20,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:29:20,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:29:20,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:29:20,348 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:29:20,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:29:20,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:29:20,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:29:20,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:29:20,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:29:20,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:29:20,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:29:20,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:29:20,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:29:20,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:29:20,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:29:20,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:29:20,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:29:20,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:29:20,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:29:20,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:29:20,793 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:29:20,794 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:29:20,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2020-12-22 02:29:20,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1002c83ac/cdbff2ed5ccd4379ace58345f86959d1/FLAG7537fbd66 [2020-12-22 02:29:22,049 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:29:22,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2020-12-22 02:29:22,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1002c83ac/cdbff2ed5ccd4379ace58345f86959d1/FLAG7537fbd66 [2020-12-22 02:29:22,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1002c83ac/cdbff2ed5ccd4379ace58345f86959d1 [2020-12-22 02:29:22,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:29:22,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:29:22,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:29:22,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:29:22,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:29:22,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:22" (1/1) ... [2020-12-22 02:29:22,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5483eaeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:22, skipping insertion in model container [2020-12-22 02:29:22,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:22" (1/1) ... [2020-12-22 02:29:22,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:29:22,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:29:22,979 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_label33.c[2518,2531] [2020-12-22 02:29:24,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:29:24,089 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:29:24,138 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_label33.c[2518,2531] [2020-12-22 02:29:24,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:29:24,685 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:29:24,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24 WrapperNode [2020-12-22 02:29:24,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:29:24,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:29:24,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:29:24,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:29:24,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:24,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:29:25,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:29:25,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:29:25,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:29:25,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (1/1) ... [2020-12-22 02:29:25,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:29:25,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:29:25,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:29:25,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:29:25,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (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 02:29:26,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:29:26,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:29:26,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:29:26,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:29:31,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:29:31,375 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:29:31,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:29:31 BoogieIcfgContainer [2020-12-22 02:29:31,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:29:31,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:29:31,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:29:31,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:29:31,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:29:22" (1/3) ... [2020-12-22 02:29:31,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f70237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:29:31, skipping insertion in model container [2020-12-22 02:29:31,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:24" (2/3) ... [2020-12-22 02:29:31,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f70237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:29:31, skipping insertion in model container [2020-12-22 02:29:31,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:29:31" (3/3) ... [2020-12-22 02:29:31,418 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label33.c [2020-12-22 02:29:31,439 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:29:31,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:29:31,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:29:31,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:29:31,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:29:31,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:29:31,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:29:31,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:29:31,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:29:31,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:29:31,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:29:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:29:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 02:29:31,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:29:31,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:29:31,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:29:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:29:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2020-12-22 02:29:31,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:29:31,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537418555] [2020-12-22 02:29:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:29:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:29:31,946 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 02:29:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537418555] [2020-12-22 02:29:31,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:29:31,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:29:31,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679490972] [2020-12-22 02:29:31,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:29:31,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:29:31,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:29:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:29:31,990 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:29:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:29:37,039 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2020-12-22 02:29:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:29:37,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 02:29:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:29:37,072 INFO L225 Difference]: With dead ends: 1642 [2020-12-22 02:29:37,073 INFO L226 Difference]: Without dead ends: 975 [2020-12-22 02:29:37,082 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 02:29:37,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-12-22 02:29:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2020-12-22 02:29:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2020-12-22 02:29:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2020-12-22 02:29:37,296 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 16 [2020-12-22 02:29:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:29:37,297 INFO L481 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2020-12-22 02:29:37,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:29:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2020-12-22 02:29:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 02:29:37,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:29:37,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:29:37,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:29:37,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:29:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:29:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash 855980798, now seen corresponding path program 1 times [2020-12-22 02:29:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:29:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702956402] [2020-12-22 02:29:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:29:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:29:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:29:37,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702956402] [2020-12-22 02:29:37,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:29:37,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:29:37,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589195060] [2020-12-22 02:29:37,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:29:37,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:29:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:29:37,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:29:37,744 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand 4 states. [2020-12-22 02:29:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:29:45,285 INFO L93 Difference]: Finished difference Result 3735 states and 5654 transitions. [2020-12-22 02:29:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:29:45,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-12-22 02:29:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:29:45,304 INFO L225 Difference]: With dead ends: 3735 [2020-12-22 02:29:45,304 INFO L226 Difference]: Without dead ends: 2765 [2020-12-22 02:29:45,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:29:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2020-12-22 02:29:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2724. [2020-12-22 02:29:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2724 states. [2020-12-22 02:29:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3797 transitions. [2020-12-22 02:29:45,396 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3797 transitions. Word has length 86 [2020-12-22 02:29:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:29:45,397 INFO L481 AbstractCegarLoop]: Abstraction has 2724 states and 3797 transitions. [2020-12-22 02:29:45,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:29:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3797 transitions. [2020-12-22 02:29:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 02:29:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:29:45,403 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:29:45,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:29:45,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:29:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:29:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1101270044, now seen corresponding path program 1 times [2020-12-22 02:29:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:29:45,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257417453] [2020-12-22 02:29:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:29:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:29:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:29:45,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257417453] [2020-12-22 02:29:45,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:29:45,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:29:45,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049403325] [2020-12-22 02:29:45,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:29:45,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:29:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:29:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:29:45,683 INFO L87 Difference]: Start difference. First operand 2724 states and 3797 transitions. Second operand 3 states. [2020-12-22 02:29:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:29:51,269 INFO L93 Difference]: Finished difference Result 6325 states and 8834 transitions. [2020-12-22 02:29:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:29:51,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 02:29:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:29:51,295 INFO L225 Difference]: With dead ends: 6325 [2020-12-22 02:29:51,295 INFO L226 Difference]: Without dead ends: 3603 [2020-12-22 02:29:51,301 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 02:29:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2020-12-22 02:29:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 3583. [2020-12-22 02:29:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3583 states. [2020-12-22 02:29:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4873 transitions. [2020-12-22 02:29:51,401 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4873 transitions. Word has length 121 [2020-12-22 02:29:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:29:51,402 INFO L481 AbstractCegarLoop]: Abstraction has 3583 states and 4873 transitions. [2020-12-22 02:29:51,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:29:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4873 transitions. [2020-12-22 02:29:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 02:29:51,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:29:51,405 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:29:51,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:29:51,406 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:29:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:29:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 582217397, now seen corresponding path program 1 times [2020-12-22 02:29:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:29:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081671599] [2020-12-22 02:29:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:29:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:29:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:29:51,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081671599] [2020-12-22 02:29:51,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:29:51,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:29:51,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965687480] [2020-12-22 02:29:51,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:29:51,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:29:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:29:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:29:51,630 INFO L87 Difference]: Start difference. First operand 3583 states and 4873 transitions. Second operand 3 states. [2020-12-22 02:29:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:29:55,926 INFO L93 Difference]: Finished difference Result 9293 states and 12695 transitions. [2020-12-22 02:29:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:29:55,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 02:29:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:29:55,954 INFO L225 Difference]: With dead ends: 9293 [2020-12-22 02:29:55,954 INFO L226 Difference]: Without dead ends: 4853 [2020-12-22 02:29:55,963 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 02:29:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4853 states. [2020-12-22 02:29:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4853 to 4001. [2020-12-22 02:29:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2020-12-22 02:29:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 4911 transitions. [2020-12-22 02:29:56,076 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 4911 transitions. Word has length 127 [2020-12-22 02:29:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:29:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 4001 states and 4911 transitions. [2020-12-22 02:29:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:29:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 4911 transitions. [2020-12-22 02:29:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 02:29:56,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:29:56,080 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:29:56,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:29:56,081 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:29:56,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:29:56,082 INFO L82 PathProgramCache]: Analyzing trace with hash -387388432, now seen corresponding path program 1 times [2020-12-22 02:29:56,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:29:56,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376614524] [2020-12-22 02:29:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:29:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:29:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 02:29:56,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376614524] [2020-12-22 02:29:56,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:29:56,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:29:56,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396958497] [2020-12-22 02:29:56,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:29:56,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:29:56,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:29:56,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:29:56,276 INFO L87 Difference]: Start difference. First operand 4001 states and 4911 transitions. Second operand 3 states. [2020-12-22 02:30:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:01,332 INFO L93 Difference]: Finished difference Result 10125 states and 12629 transitions. [2020-12-22 02:30:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:01,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 02:30:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:01,361 INFO L225 Difference]: With dead ends: 10125 [2020-12-22 02:30:01,361 INFO L226 Difference]: Without dead ends: 6126 [2020-12-22 02:30:01,370 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 02:30:01,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2020-12-22 02:30:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3978. [2020-12-22 02:30:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3978 states. [2020-12-22 02:30:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4876 transitions. [2020-12-22 02:30:01,565 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4876 transitions. Word has length 170 [2020-12-22 02:30:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:01,567 INFO L481 AbstractCegarLoop]: Abstraction has 3978 states and 4876 transitions. [2020-12-22 02:30:01,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4876 transitions. [2020-12-22 02:30:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 02:30:01,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:01,574 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:30:01,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:30:01,575 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1143517189, now seen corresponding path program 1 times [2020-12-22 02:30:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:01,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887292871] [2020-12-22 02:30:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:30:01,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887292871] [2020-12-22 02:30:01,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212997587] [2020-12-22 02:30:01,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:01,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:01,858 INFO L87 Difference]: Start difference. First operand 3978 states and 4876 transitions. Second operand 3 states. [2020-12-22 02:30:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:06,523 INFO L93 Difference]: Finished difference Result 10511 states and 13139 transitions. [2020-12-22 02:30:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:06,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2020-12-22 02:30:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:06,565 INFO L225 Difference]: With dead ends: 10511 [2020-12-22 02:30:06,566 INFO L226 Difference]: Without dead ends: 6535 [2020-12-22 02:30:06,575 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 02:30:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2020-12-22 02:30:06,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6535. [2020-12-22 02:30:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6535 states. [2020-12-22 02:30:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 7879 transitions. [2020-12-22 02:30:06,747 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 7879 transitions. Word has length 177 [2020-12-22 02:30:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:06,748 INFO L481 AbstractCegarLoop]: Abstraction has 6535 states and 7879 transitions. [2020-12-22 02:30:06,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 7879 transitions. [2020-12-22 02:30:06,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 02:30:06,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:06,754 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:30:06,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:30:06,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash -18097380, now seen corresponding path program 1 times [2020-12-22 02:30:06,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:06,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048449151] [2020-12-22 02:30:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 02:30:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048449151] [2020-12-22 02:30:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421093157] [2020-12-22 02:30:07,119 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 02:30:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:30:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:30:07,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:30:07,597 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:30:07,861 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:30:08,101 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:30:08,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:30:08,484 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:30:08,629 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:30:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 02:30:09,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:30:09,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 02:30:09,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278826136] [2020-12-22 02:30:09,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:30:09,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:30:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:30:09,732 INFO L87 Difference]: Start difference. First operand 6535 states and 7879 transitions. Second operand 4 states. [2020-12-22 02:30:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:17,994 INFO L93 Difference]: Finished difference Result 16907 states and 20637 transitions. [2020-12-22 02:30:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:30:18,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 240 [2020-12-22 02:30:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:18,104 INFO L225 Difference]: With dead ends: 16907 [2020-12-22 02:30:18,107 INFO L226 Difference]: Without dead ends: 9524 [2020-12-22 02:30:18,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 238 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 02:30:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2020-12-22 02:30:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9522. [2020-12-22 02:30:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9522 states. [2020-12-22 02:30:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 11083 transitions. [2020-12-22 02:30:18,348 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 11083 transitions. Word has length 240 [2020-12-22 02:30:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:18,349 INFO L481 AbstractCegarLoop]: Abstraction has 9522 states and 11083 transitions. [2020-12-22 02:30:18,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:30:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 11083 transitions. [2020-12-22 02:30:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-22 02:30:18,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:18,355 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:30:18,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 02:30:18,569 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1769951557, now seen corresponding path program 1 times [2020-12-22 02:30:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:18,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449293417] [2020-12-22 02:30:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-22 02:30:18,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449293417] [2020-12-22 02:30:18,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:18,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:18,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122084199] [2020-12-22 02:30:18,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:18,858 INFO L87 Difference]: Start difference. First operand 9522 states and 11083 transitions. Second operand 3 states. [2020-12-22 02:30:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:24,942 INFO L93 Difference]: Finished difference Result 24594 states and 28966 transitions. [2020-12-22 02:30:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:24,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2020-12-22 02:30:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:24,982 INFO L225 Difference]: With dead ends: 24594 [2020-12-22 02:30:24,983 INFO L226 Difference]: Without dead ends: 14648 [2020-12-22 02:30:25,007 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 02:30:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14648 states. [2020-12-22 02:30:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14648 to 9522. [2020-12-22 02:30:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9522 states. [2020-12-22 02:30:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 11053 transitions. [2020-12-22 02:30:25,249 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 11053 transitions. Word has length 276 [2020-12-22 02:30:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:25,250 INFO L481 AbstractCegarLoop]: Abstraction has 9522 states and 11053 transitions. [2020-12-22 02:30:25,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 11053 transitions. [2020-12-22 02:30:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-22 02:30:25,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:25,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:30:25,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:30:25,258 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1196123638, now seen corresponding path program 1 times [2020-12-22 02:30:25,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:25,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041497302] [2020-12-22 02:30:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 02:30:25,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041497302] [2020-12-22 02:30:25,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:25,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:25,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970104970] [2020-12-22 02:30:25,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:25,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:25,482 INFO L87 Difference]: Start difference. First operand 9522 states and 11053 transitions. Second operand 3 states. [2020-12-22 02:30:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:31,497 INFO L93 Difference]: Finished difference Result 25846 states and 30175 transitions. [2020-12-22 02:30:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:31,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 288 [2020-12-22 02:30:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:31,543 INFO L225 Difference]: With dead ends: 25846 [2020-12-22 02:30:31,544 INFO L226 Difference]: Without dead ends: 16751 [2020-12-22 02:30:31,560 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 02:30:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16751 states. [2020-12-22 02:30:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16751 to 15470. [2020-12-22 02:30:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15470 states. [2020-12-22 02:30:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15470 states to 15470 states and 17643 transitions. [2020-12-22 02:30:31,841 INFO L78 Accepts]: Start accepts. Automaton has 15470 states and 17643 transitions. Word has length 288 [2020-12-22 02:30:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:31,842 INFO L481 AbstractCegarLoop]: Abstraction has 15470 states and 17643 transitions. [2020-12-22 02:30:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15470 states and 17643 transitions. [2020-12-22 02:30:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-12-22 02:30:31,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:31,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:30:31,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:30:31,850 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -440189519, now seen corresponding path program 1 times [2020-12-22 02:30:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:31,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773396404] [2020-12-22 02:30:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-22 02:30:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773396404] [2020-12-22 02:30:32,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:32,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:32,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879271632] [2020-12-22 02:30:32,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:32,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:32,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:32,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:32,183 INFO L87 Difference]: Start difference. First operand 15470 states and 17643 transitions. Second operand 3 states. [2020-12-22 02:30:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:38,663 INFO L93 Difference]: Finished difference Result 36039 states and 41656 transitions. [2020-12-22 02:30:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:38,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2020-12-22 02:30:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:38,723 INFO L225 Difference]: With dead ends: 36039 [2020-12-22 02:30:38,723 INFO L226 Difference]: Without dead ends: 19721 [2020-12-22 02:30:38,753 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 02:30:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19721 states. [2020-12-22 02:30:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19721 to 15888. [2020-12-22 02:30:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15888 states. [2020-12-22 02:30:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 17958 transitions. [2020-12-22 02:30:39,178 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 17958 transitions. Word has length 303 [2020-12-22 02:30:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:39,179 INFO L481 AbstractCegarLoop]: Abstraction has 15888 states and 17958 transitions. [2020-12-22 02:30:39,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 17958 transitions. [2020-12-22 02:30:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-12-22 02:30:39,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:39,190 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:39,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:30:39,191 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1663624910, now seen corresponding path program 1 times [2020-12-22 02:30:39,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:39,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525049611] [2020-12-22 02:30:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-12-22 02:30:39,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525049611] [2020-12-22 02:30:39,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:39,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:39,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812915552] [2020-12-22 02:30:39,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:39,502 INFO L87 Difference]: Start difference. First operand 15888 states and 17958 transitions. Second operand 3 states. [2020-12-22 02:30:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:46,219 INFO L93 Difference]: Finished difference Result 40756 states and 46103 transitions. [2020-12-22 02:30:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:46,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-12-22 02:30:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:46,291 INFO L225 Difference]: With dead ends: 40756 [2020-12-22 02:30:46,291 INFO L226 Difference]: Without dead ends: 25295 [2020-12-22 02:30:46,323 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 02:30:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2020-12-22 02:30:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 24841. [2020-12-22 02:30:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24841 states. [2020-12-22 02:30:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24841 states to 24841 states and 27993 transitions. [2020-12-22 02:30:46,963 INFO L78 Accepts]: Start accepts. Automaton has 24841 states and 27993 transitions. Word has length 337 [2020-12-22 02:30:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:46,965 INFO L481 AbstractCegarLoop]: Abstraction has 24841 states and 27993 transitions. [2020-12-22 02:30:46,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24841 states and 27993 transitions. [2020-12-22 02:30:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-12-22 02:30:46,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:46,982 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 02:30:46,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:30:46,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash 856661093, now seen corresponding path program 1 times [2020-12-22 02:30:46,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:46,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701330192] [2020-12-22 02:30:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 389 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-22 02:30:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701330192] [2020-12-22 02:30:47,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:47,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168846443] [2020-12-22 02:30:47,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:47,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:47,518 INFO L87 Difference]: Start difference. First operand 24841 states and 27993 transitions. Second operand 3 states. [2020-12-22 02:30:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:30:55,748 INFO L93 Difference]: Finished difference Result 59068 states and 66804 transitions. [2020-12-22 02:30:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:30:55,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-12-22 02:30:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:30:55,800 INFO L225 Difference]: With dead ends: 59068 [2020-12-22 02:30:55,801 INFO L226 Difference]: Without dead ends: 32952 [2020-12-22 02:30:55,824 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 02:30:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32952 states. [2020-12-22 02:30:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32952 to 32942. [2020-12-22 02:30:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32942 states. [2020-12-22 02:30:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32942 states to 32942 states and 36513 transitions. [2020-12-22 02:30:56,493 INFO L78 Accepts]: Start accepts. Automaton has 32942 states and 36513 transitions. Word has length 343 [2020-12-22 02:30:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:30:56,495 INFO L481 AbstractCegarLoop]: Abstraction has 32942 states and 36513 transitions. [2020-12-22 02:30:56,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:30:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32942 states and 36513 transitions. [2020-12-22 02:30:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-12-22 02:30:56,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:30:56,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 02:30:56,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:30:56,503 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:30:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:30:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1626126166, now seen corresponding path program 1 times [2020-12-22 02:30:56,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:30:56,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697566693] [2020-12-22 02:30:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:30:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:30:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-22 02:30:56,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697566693] [2020-12-22 02:30:56,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:30:56,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:30:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62994664] [2020-12-22 02:30:56,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:30:56,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:30:56,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:30:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:30:56,893 INFO L87 Difference]: Start difference. First operand 32942 states and 36513 transitions. Second operand 3 states. [2020-12-22 02:31:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:03,977 INFO L93 Difference]: Finished difference Result 76558 states and 85463 transitions. [2020-12-22 02:31:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:03,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-12-22 02:31:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:04,031 INFO L225 Difference]: With dead ends: 76558 [2020-12-22 02:31:04,031 INFO L226 Difference]: Without dead ends: 42330 [2020-12-22 02:31:04,059 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 02:31:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42330 states. [2020-12-22 02:31:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42330 to 41042. [2020-12-22 02:31:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41042 states. [2020-12-22 02:31:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41042 states to 41042 states and 45563 transitions. [2020-12-22 02:31:04,985 INFO L78 Accepts]: Start accepts. Automaton has 41042 states and 45563 transitions. Word has length 345 [2020-12-22 02:31:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:04,986 INFO L481 AbstractCegarLoop]: Abstraction has 41042 states and 45563 transitions. [2020-12-22 02:31:04,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 41042 states and 45563 transitions. [2020-12-22 02:31:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-12-22 02:31:04,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:04,997 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:04,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:31:04,997 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash -582910584, now seen corresponding path program 1 times [2020-12-22 02:31:04,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:04,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367525220] [2020-12-22 02:31:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 609 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-22 02:31:05,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367525220] [2020-12-22 02:31:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:05,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961475084] [2020-12-22 02:31:05,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:05,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:05,590 INFO L87 Difference]: Start difference. First operand 41042 states and 45563 transitions. Second operand 3 states. [2020-12-22 02:31:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:12,479 INFO L93 Difference]: Finished difference Result 90210 states and 100567 transitions. [2020-12-22 02:31:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:12,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 419 [2020-12-22 02:31:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:12,586 INFO L225 Difference]: With dead ends: 90210 [2020-12-22 02:31:12,586 INFO L226 Difference]: Without dead ends: 49595 [2020-12-22 02:31:12,621 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 02:31:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49595 states. [2020-12-22 02:31:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49595 to 47863. [2020-12-22 02:31:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47863 states. [2020-12-22 02:31:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47863 states to 47863 states and 53513 transitions. [2020-12-22 02:31:13,789 INFO L78 Accepts]: Start accepts. Automaton has 47863 states and 53513 transitions. Word has length 419 [2020-12-22 02:31:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:13,790 INFO L481 AbstractCegarLoop]: Abstraction has 47863 states and 53513 transitions. [2020-12-22 02:31:13,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 47863 states and 53513 transitions. [2020-12-22 02:31:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-12-22 02:31:13,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:13,802 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1] [2020-12-22 02:31:13,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:31:13,802 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:13,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:13,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1854218627, now seen corresponding path program 1 times [2020-12-22 02:31:13,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:13,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28715912] [2020-12-22 02:31:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-22 02:31:14,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28715912] [2020-12-22 02:31:14,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:14,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:31:14,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795048196] [2020-12-22 02:31:14,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:31:14,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:14,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:31:14,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:31:14,373 INFO L87 Difference]: Start difference. First operand 47863 states and 53513 transitions. Second operand 4 states. [2020-12-22 02:31:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:25,549 INFO L93 Difference]: Finished difference Result 122581 states and 136920 transitions. [2020-12-22 02:31:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:31:25,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2020-12-22 02:31:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:25,658 INFO L225 Difference]: With dead ends: 122581 [2020-12-22 02:31:25,658 INFO L226 Difference]: Without dead ends: 74295 [2020-12-22 02:31:25,695 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 02:31:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74295 states. [2020-12-22 02:31:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74295 to 64079. [2020-12-22 02:31:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64079 states. [2020-12-22 02:31:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64079 states to 64079 states and 71792 transitions. [2020-12-22 02:31:27,011 INFO L78 Accepts]: Start accepts. Automaton has 64079 states and 71792 transitions. Word has length 420 [2020-12-22 02:31:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:27,011 INFO L481 AbstractCegarLoop]: Abstraction has 64079 states and 71792 transitions. [2020-12-22 02:31:27,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:31:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 64079 states and 71792 transitions. [2020-12-22 02:31:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-12-22 02:31:27,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:27,027 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 02:31:27,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:31:27,028 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 984617223, now seen corresponding path program 1 times [2020-12-22 02:31:27,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:27,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534093409] [2020-12-22 02:31:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-12-22 02:31:27,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534093409] [2020-12-22 02:31:27,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:27,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:27,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117507592] [2020-12-22 02:31:27,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:27,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:27,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:27,919 INFO L87 Difference]: Start difference. First operand 64079 states and 71792 transitions. Second operand 3 states. [2020-12-22 02:31:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:36,031 INFO L93 Difference]: Finished difference Result 139236 states and 155991 transitions. [2020-12-22 02:31:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:36,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 440 [2020-12-22 02:31:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:36,162 INFO L225 Difference]: With dead ends: 139236 [2020-12-22 02:31:36,162 INFO L226 Difference]: Without dead ends: 75158 [2020-12-22 02:31:36,205 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 02:31:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75158 states. [2020-12-22 02:31:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75158 to 58093. [2020-12-22 02:31:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58093 states. [2020-12-22 02:31:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58093 states to 58093 states and 65119 transitions. [2020-12-22 02:31:37,569 INFO L78 Accepts]: Start accepts. Automaton has 58093 states and 65119 transitions. Word has length 440 [2020-12-22 02:31:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:37,570 INFO L481 AbstractCegarLoop]: Abstraction has 58093 states and 65119 transitions. [2020-12-22 02:31:37,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 58093 states and 65119 transitions. [2020-12-22 02:31:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-12-22 02:31:37,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:37,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:37,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:31:37,592 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1085398361, now seen corresponding path program 1 times [2020-12-22 02:31:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:37,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311260701] [2020-12-22 02:31:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 296 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:38,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311260701] [2020-12-22 02:31:38,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848519142] [2020-12-22 02:31:38,621 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 02:31:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:38,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:31:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:31:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 214 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 02:31:40,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:31:40,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2020-12-22 02:31:40,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947222481] [2020-12-22 02:31:40,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:31:40,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:31:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:31:40,471 INFO L87 Difference]: Start difference. First operand 58093 states and 65119 transitions. Second operand 7 states. [2020-12-22 02:32:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:06,123 INFO L93 Difference]: Finished difference Result 150691 states and 168810 transitions. [2020-12-22 02:32:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 02:32:06,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 451 [2020-12-22 02:32:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:06,227 INFO L225 Difference]: With dead ends: 150691 [2020-12-22 02:32:06,228 INFO L226 Difference]: Without dead ends: 91748 [2020-12-22 02:32:06,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:32:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91748 states. [2020-12-22 02:32:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91748 to 84076. [2020-12-22 02:32:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84076 states. [2020-12-22 02:32:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84076 states to 84076 states and 93579 transitions. [2020-12-22 02:32:07,664 INFO L78 Accepts]: Start accepts. Automaton has 84076 states and 93579 transitions. Word has length 451 [2020-12-22 02:32:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:07,665 INFO L481 AbstractCegarLoop]: Abstraction has 84076 states and 93579 transitions. [2020-12-22 02:32:07,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:32:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 84076 states and 93579 transitions. [2020-12-22 02:32:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-12-22 02:32:07,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:07,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-12-22 02:32:08,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 02:32:08,161 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash 503973094, now seen corresponding path program 1 times [2020-12-22 02:32:08,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:08,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996118314] [2020-12-22 02:32:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 02:32:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996118314] [2020-12-22 02:32:08,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:08,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:32:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103795229] [2020-12-22 02:32:08,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:08,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:08,831 INFO L87 Difference]: Start difference. First operand 84076 states and 93579 transitions. Second operand 4 states. [2020-12-22 02:32:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:24,169 INFO L93 Difference]: Finished difference Result 203546 states and 225985 transitions. [2020-12-22 02:32:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:32:24,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-12-22 02:32:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:24,415 INFO L225 Difference]: With dead ends: 203546 [2020-12-22 02:32:24,416 INFO L226 Difference]: Without dead ends: 116064 [2020-12-22 02:32:24,510 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 02:32:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116064 states. [2020-12-22 02:32:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116064 to 112596. [2020-12-22 02:32:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112596 states. [2020-12-22 02:32:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112596 states to 112596 states and 124522 transitions. [2020-12-22 02:32:26,936 INFO L78 Accepts]: Start accepts. Automaton has 112596 states and 124522 transitions. Word has length 460 [2020-12-22 02:32:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:26,937 INFO L481 AbstractCegarLoop]: Abstraction has 112596 states and 124522 transitions. [2020-12-22 02:32:26,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:32:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 112596 states and 124522 transitions. [2020-12-22 02:32:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-12-22 02:32:26,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:26,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:26,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:32:26,957 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash 295544723, now seen corresponding path program 1 times [2020-12-22 02:32:26,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:26,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677474842] [2020-12-22 02:32:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:32:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677474842] [2020-12-22 02:32:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:32:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560069491] [2020-12-22 02:32:27,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:27,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:27,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:27,796 INFO L87 Difference]: Start difference. First operand 112596 states and 124522 transitions. Second operand 4 states. [2020-12-22 02:32:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:42,611 INFO L93 Difference]: Finished difference Result 250333 states and 277106 transitions. [2020-12-22 02:32:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:32:42,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-12-22 02:32:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:42,854 INFO L225 Difference]: With dead ends: 250333 [2020-12-22 02:32:42,854 INFO L226 Difference]: Without dead ends: 138162 [2020-12-22 02:32:42,918 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 02:32:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138162 states. [2020-12-22 02:32:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138162 to 121110. [2020-12-22 02:32:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121110 states. [2020-12-22 02:32:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121110 states to 121110 states and 134245 transitions. [2020-12-22 02:32:45,280 INFO L78 Accepts]: Start accepts. Automaton has 121110 states and 134245 transitions. Word has length 494 [2020-12-22 02:32:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:45,280 INFO L481 AbstractCegarLoop]: Abstraction has 121110 states and 134245 transitions. [2020-12-22 02:32:45,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:32:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 121110 states and 134245 transitions. [2020-12-22 02:32:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-12-22 02:32:45,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:45,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:32:45,297 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1617166263, now seen corresponding path program 1 times [2020-12-22 02:32:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:45,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014637150] [2020-12-22 02:32:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 257 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 02:32:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014637150] [2020-12-22 02:32:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601335998] [2020-12-22 02:32:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:32:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:32:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:32:47,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:32:47,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 02:32:47,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:32:47,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-12-22 02:32:47,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729347207] [2020-12-22 02:32:47,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:47,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:47,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:47,510 INFO L87 Difference]: Start difference. First operand 121110 states and 134245 transitions. Second operand 4 states. [2020-12-22 02:33:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:00,251 INFO L93 Difference]: Finished difference Result 243922 states and 270301 transitions. [2020-12-22 02:33:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:00,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-12-22 02:33:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:00,484 INFO L225 Difference]: With dead ends: 243922 [2020-12-22 02:33:00,484 INFO L226 Difference]: Without dead ends: 124089 [2020-12-22 02:33:00,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 232 SyntacticMatches, 0 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 02:33:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124089 states. [2020-12-22 02:33:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124089 to 123658. [2020-12-22 02:33:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123658 states. [2020-12-22 02:33:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123658 states to 123658 states and 136806 transitions. [2020-12-22 02:33:02,918 INFO L78 Accepts]: Start accepts. Automaton has 123658 states and 136806 transitions. Word has length 507 [2020-12-22 02:33:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:02,919 INFO L481 AbstractCegarLoop]: Abstraction has 123658 states and 136806 transitions. [2020-12-22 02:33:02,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 123658 states and 136806 transitions. [2020-12-22 02:33:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2020-12-22 02:33:02,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:02,941 INFO L422 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:03,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:33:03,155 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1547645957, now seen corresponding path program 1 times [2020-12-22 02:33:03,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:03,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783988067] [2020-12-22 02:33:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 617 proven. 0 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 02:33:04,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783988067] [2020-12-22 02:33:04,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:04,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:33:04,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119022974] [2020-12-22 02:33:04,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:04,307 INFO L87 Difference]: Start difference. First operand 123658 states and 136806 transitions. Second operand 3 states.