/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/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:46,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:46,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:46,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:39:46,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:46,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:46,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:46,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:46,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:46,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:46,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:46,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:46,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:46,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:46,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:46,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:46,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:39:46,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:46,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:46,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:46,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:46,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:46,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:46,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:46,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:46,490 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:46,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:46,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:46,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:46,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:46,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:46,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:46,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:46,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:46,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:46,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:46,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:46,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:46,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:46,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:46,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:46,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:46,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:46,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:46,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:46,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:46,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:46,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:46,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:46,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:46,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:46,980 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:46,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:47,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39ac091a/25cb215a882d452382bda61d959c1a3f/FLAGf0c80e5a5 [2020-12-22 07:39:47,704 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:47,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:47,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39ac091a/25cb215a882d452382bda61d959c1a3f/FLAGf0c80e5a5 [2020-12-22 07:39:48,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39ac091a/25cb215a882d452382bda61d959c1a3f [2020-12-22 07:39:48,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:48,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:48,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:48,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:48,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:48,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@929e5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48, skipping insertion in model container [2020-12-22 07:39:48,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:48,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:48,467 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/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c[14511,14524] [2020-12-22 07:39:48,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:48,497 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:48,568 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/seq-mthreaded/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c[14511,14524] [2020-12-22 07:39:48,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:48,591 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:48,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48 WrapperNode [2020-12-22 07:39:48,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:48,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:48,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:48,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:48,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:48,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:48,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:48,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:48,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (1/1) ... [2020-12-22 07:39:48,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:48,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:48,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:48,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:48,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (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 07:39:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:48,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:49,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:49,844 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:49,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:49 BoogieIcfgContainer [2020-12-22 07:39:49,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:49,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:49,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:49,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:49,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:48" (1/3) ... [2020-12-22 07:39:49,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c0cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:49, skipping insertion in model container [2020-12-22 07:39:49,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:48" (2/3) ... [2020-12-22 07:39:49,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c0cb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:49, skipping insertion in model container [2020-12-22 07:39:49,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:49" (3/3) ... [2020-12-22 07:39:49,867 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:39:49,884 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:49,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:49,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:49,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:49,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:49,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:49,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:49,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:49,969 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:49,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:49,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 07:39:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:49,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:50,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2020-12-22 07:39:50,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118949803] [2020-12-22 07:39:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:50,354 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 07:39:50,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118949803] [2020-12-22 07:39:50,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:50,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239194346] [2020-12-22 07:39:50,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:50,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:50,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:50,389 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 2 states. [2020-12-22 07:39:50,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:50,449 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2020-12-22 07:39:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:50,451 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:50,471 INFO L225 Difference]: With dead ends: 233 [2020-12-22 07:39:50,474 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:39:50,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:39:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:39:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:39:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2020-12-22 07:39:50,558 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 37 [2020-12-22 07:39:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:50,559 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2020-12-22 07:39:50,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2020-12-22 07:39:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:50,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:50,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:50,569 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2020-12-22 07:39:50,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857524591] [2020-12-22 07:39:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:50,766 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 07:39:50,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857524591] [2020-12-22 07:39:50,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:50,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:50,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295562523] [2020-12-22 07:39:50,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:50,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:50,771 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand 5 states. [2020-12-22 07:39:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:50,889 INFO L93 Difference]: Finished difference Result 232 states and 394 transitions. [2020-12-22 07:39:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:50,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:50,891 INFO L225 Difference]: With dead ends: 232 [2020-12-22 07:39:50,892 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:39:50,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:39:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:39:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:39:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 219 transitions. [2020-12-22 07:39:50,903 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 219 transitions. Word has length 37 [2020-12-22 07:39:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:50,904 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 219 transitions. [2020-12-22 07:39:50,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 219 transitions. [2020-12-22 07:39:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:50,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:50,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:50,907 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2020-12-22 07:39:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343495238] [2020-12-22 07:39:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:51,106 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 07:39:51,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343495238] [2020-12-22 07:39:51,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:51,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:51,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112571916] [2020-12-22 07:39:51,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:51,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:51,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,109 INFO L87 Difference]: Start difference. First operand 144 states and 219 transitions. Second operand 3 states. [2020-12-22 07:39:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,166 INFO L93 Difference]: Finished difference Result 302 states and 483 transitions. [2020-12-22 07:39:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:39:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,169 INFO L225 Difference]: With dead ends: 302 [2020-12-22 07:39:51,169 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 07:39:51,170 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 07:39:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 07:39:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-12-22 07:39:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 07:39:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 334 transitions. [2020-12-22 07:39:51,187 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 334 transitions. Word has length 66 [2020-12-22 07:39:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:51,188 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 334 transitions. [2020-12-22 07:39:51,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 334 transitions. [2020-12-22 07:39:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:51,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:51,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:51,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:51,191 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2020-12-22 07:39:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:51,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556847444] [2020-12-22 07:39:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:51,308 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 07:39:51,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556847444] [2020-12-22 07:39:51,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:51,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:51,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744595096] [2020-12-22 07:39:51,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,313 INFO L87 Difference]: Start difference. First operand 215 states and 334 transitions. Second operand 3 states. [2020-12-22 07:39:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,360 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2020-12-22 07:39:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,364 INFO L225 Difference]: With dead ends: 509 [2020-12-22 07:39:51,364 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 07:39:51,365 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 07:39:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 07:39:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2020-12-22 07:39:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-12-22 07:39:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 555 transitions. [2020-12-22 07:39:51,386 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 555 transitions. Word has length 68 [2020-12-22 07:39:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:51,387 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 555 transitions. [2020-12-22 07:39:51,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 555 transitions. [2020-12-22 07:39:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:51,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:51,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:51,389 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2020-12-22 07:39:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:51,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917337081] [2020-12-22 07:39:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:51,536 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 07:39:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917337081] [2020-12-22 07:39:51,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:51,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:51,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301746272] [2020-12-22 07:39:51,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:51,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:51,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:51,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,542 INFO L87 Difference]: Start difference. First operand 350 states and 555 transitions. Second operand 3 states. [2020-12-22 07:39:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,615 INFO L93 Difference]: Finished difference Result 898 states and 1453 transitions. [2020-12-22 07:39:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,621 INFO L225 Difference]: With dead ends: 898 [2020-12-22 07:39:51,622 INFO L226 Difference]: Without dead ends: 608 [2020-12-22 07:39:51,623 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 07:39:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-12-22 07:39:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 602. [2020-12-22 07:39:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:39:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 963 transitions. [2020-12-22 07:39:51,673 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 963 transitions. Word has length 70 [2020-12-22 07:39:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:51,676 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 963 transitions. [2020-12-22 07:39:51,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 963 transitions. [2020-12-22 07:39:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:51,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:51,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:51,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:39:51,679 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2020-12-22 07:39:51,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:51,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437485325] [2020-12-22 07:39:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:51,837 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 07:39:51,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437485325] [2020-12-22 07:39:51,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:51,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960614607] [2020-12-22 07:39:51,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:51,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:51,840 INFO L87 Difference]: Start difference. First operand 602 states and 963 transitions. Second operand 5 states. [2020-12-22 07:39:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:52,037 INFO L93 Difference]: Finished difference Result 2296 states and 3768 transitions. [2020-12-22 07:39:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:39:52,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:39:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:52,048 INFO L225 Difference]: With dead ends: 2296 [2020-12-22 07:39:52,048 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 07:39:52,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 07:39:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1077. [2020-12-22 07:39:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-12-22 07:39:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1739 transitions. [2020-12-22 07:39:52,096 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1739 transitions. Word has length 72 [2020-12-22 07:39:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:52,097 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 1739 transitions. [2020-12-22 07:39:52,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1739 transitions. [2020-12-22 07:39:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:52,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:52,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:52,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:39:52,099 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2020-12-22 07:39:52,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:52,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153488607] [2020-12-22 07:39:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:52,195 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 07:39:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153488607] [2020-12-22 07:39:52,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:52,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:52,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995200101] [2020-12-22 07:39:52,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:52,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:52,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:52,200 INFO L87 Difference]: Start difference. First operand 1077 states and 1739 transitions. Second operand 4 states. [2020-12-22 07:39:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:52,339 INFO L93 Difference]: Finished difference Result 3138 states and 5142 transitions. [2020-12-22 07:39:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:52,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:52,351 INFO L225 Difference]: With dead ends: 3138 [2020-12-22 07:39:52,352 INFO L226 Difference]: Without dead ends: 2121 [2020-12-22 07:39:52,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-12-22 07:39:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1590. [2020-12-22 07:39:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2020-12-22 07:39:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2581 transitions. [2020-12-22 07:39:52,424 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2581 transitions. Word has length 73 [2020-12-22 07:39:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:52,425 INFO L481 AbstractCegarLoop]: Abstraction has 1590 states and 2581 transitions. [2020-12-22 07:39:52,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2581 transitions. [2020-12-22 07:39:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:52,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:52,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:52,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:39:52,427 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2020-12-22 07:39:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:52,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738947780] [2020-12-22 07:39:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:52,491 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 07:39:52,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738947780] [2020-12-22 07:39:52,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:52,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:52,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940828153] [2020-12-22 07:39:52,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:52,494 INFO L87 Difference]: Start difference. First operand 1590 states and 2581 transitions. Second operand 4 states. [2020-12-22 07:39:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:52,648 INFO L93 Difference]: Finished difference Result 4612 states and 7546 transitions. [2020-12-22 07:39:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:52,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:39:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:52,665 INFO L225 Difference]: With dead ends: 4612 [2020-12-22 07:39:52,665 INFO L226 Difference]: Without dead ends: 3082 [2020-12-22 07:39:52,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2020-12-22 07:39:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2324. [2020-12-22 07:39:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2020-12-22 07:39:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3771 transitions. [2020-12-22 07:39:52,783 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3771 transitions. Word has length 74 [2020-12-22 07:39:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:52,784 INFO L481 AbstractCegarLoop]: Abstraction has 2324 states and 3771 transitions. [2020-12-22 07:39:52,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3771 transitions. [2020-12-22 07:39:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:39:52,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:52,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:52,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:39:52,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2020-12-22 07:39:52,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:52,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178403305] [2020-12-22 07:39:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:52,872 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 07:39:52,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178403305] [2020-12-22 07:39:52,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:52,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:52,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935694915] [2020-12-22 07:39:52,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:52,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:52,875 INFO L87 Difference]: Start difference. First operand 2324 states and 3771 transitions. Second operand 4 states. [2020-12-22 07:39:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:53,053 INFO L93 Difference]: Finished difference Result 6704 states and 10946 transitions. [2020-12-22 07:39:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:53,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:39:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:53,076 INFO L225 Difference]: With dead ends: 6704 [2020-12-22 07:39:53,077 INFO L226 Difference]: Without dead ends: 4440 [2020-12-22 07:39:53,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2020-12-22 07:39:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3366. [2020-12-22 07:39:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3366 states. [2020-12-22 07:39:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5455 transitions. [2020-12-22 07:39:53,263 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 5455 transitions. Word has length 75 [2020-12-22 07:39:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:53,264 INFO L481 AbstractCegarLoop]: Abstraction has 3366 states and 5455 transitions. [2020-12-22 07:39:53,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 5455 transitions. [2020-12-22 07:39:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:53,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:53,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:53,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:39:53,267 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2020-12-22 07:39:53,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798447991] [2020-12-22 07:39:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,320 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 07:39:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798447991] [2020-12-22 07:39:53,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728592030] [2020-12-22 07:39:53,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:53,323 INFO L87 Difference]: Start difference. First operand 3366 states and 5455 transitions. Second operand 3 states. [2020-12-22 07:39:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:53,485 INFO L93 Difference]: Finished difference Result 7652 states and 12412 transitions. [2020-12-22 07:39:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:53,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:53,515 INFO L225 Difference]: With dead ends: 7652 [2020-12-22 07:39:53,515 INFO L226 Difference]: Without dead ends: 5262 [2020-12-22 07:39:53,521 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 07:39:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2020-12-22 07:39:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5260. [2020-12-22 07:39:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5260 states. [2020-12-22 07:39:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 8462 transitions. [2020-12-22 07:39:53,804 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 8462 transitions. Word has length 76 [2020-12-22 07:39:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 5260 states and 8462 transitions. [2020-12-22 07:39:53,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 8462 transitions. [2020-12-22 07:39:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:53,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:53,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:53,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:53,807 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2020-12-22 07:39:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037826170] [2020-12-22 07:39:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,859 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 07:39:53,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037826170] [2020-12-22 07:39:53,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:53,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735303378] [2020-12-22 07:39:53,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:53,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:53,862 INFO L87 Difference]: Start difference. First operand 5260 states and 8462 transitions. Second operand 3 states. [2020-12-22 07:39:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:54,102 INFO L93 Difference]: Finished difference Result 11472 states and 18516 transitions. [2020-12-22 07:39:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:54,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:54,145 INFO L225 Difference]: With dead ends: 11472 [2020-12-22 07:39:54,145 INFO L226 Difference]: Without dead ends: 7772 [2020-12-22 07:39:54,153 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 07:39:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2020-12-22 07:39:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7770. [2020-12-22 07:39:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7770 states. [2020-12-22 07:39:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 12446 transitions. [2020-12-22 07:39:54,533 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 12446 transitions. Word has length 76 [2020-12-22 07:39:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:54,533 INFO L481 AbstractCegarLoop]: Abstraction has 7770 states and 12446 transitions. [2020-12-22 07:39:54,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 12446 transitions. [2020-12-22 07:39:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:39:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:54,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:54,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:54,535 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash -116701437, now seen corresponding path program 1 times [2020-12-22 07:39:54,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:54,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100247330] [2020-12-22 07:39:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:54,585 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 07:39:54,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100247330] [2020-12-22 07:39:54,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:54,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:54,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321655151] [2020-12-22 07:39:54,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:54,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:54,588 INFO L87 Difference]: Start difference. First operand 7770 states and 12446 transitions. Second operand 3 states. [2020-12-22 07:39:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:54,988 INFO L93 Difference]: Finished difference Result 17197 states and 27794 transitions. [2020-12-22 07:39:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:54,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:39:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:55,023 INFO L225 Difference]: With dead ends: 17197 [2020-12-22 07:39:55,024 INFO L226 Difference]: Without dead ends: 11540 [2020-12-22 07:39:55,036 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 07:39:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2020-12-22 07:39:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 11538. [2020-12-22 07:39:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11538 states. [2020-12-22 07:39:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 18443 transitions. [2020-12-22 07:39:55,613 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 18443 transitions. Word has length 76 [2020-12-22 07:39:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:55,613 INFO L481 AbstractCegarLoop]: Abstraction has 11538 states and 18443 transitions. [2020-12-22 07:39:55,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 18443 transitions. [2020-12-22 07:39:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:39:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:55,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:55,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:55,615 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2020-12-22 07:39:55,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110571567] [2020-12-22 07:39:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:55,742 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 07:39:55,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110571567] [2020-12-22 07:39:55,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:55,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208141885] [2020-12-22 07:39:55,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:55,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:55,745 INFO L87 Difference]: Start difference. First operand 11538 states and 18443 transitions. Second operand 4 states. [2020-12-22 07:39:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:56,663 INFO L93 Difference]: Finished difference Result 34109 states and 54457 transitions. [2020-12-22 07:39:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:56,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:39:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:56,734 INFO L225 Difference]: With dead ends: 34109 [2020-12-22 07:39:56,735 INFO L226 Difference]: Without dead ends: 22580 [2020-12-22 07:39:56,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22580 states. [2020-12-22 07:39:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22580 to 22578. [2020-12-22 07:39:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22578 states. [2020-12-22 07:39:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22578 states to 22578 states and 35802 transitions. [2020-12-22 07:39:58,126 INFO L78 Accepts]: Start accepts. Automaton has 22578 states and 35802 transitions. Word has length 77 [2020-12-22 07:39:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:58,127 INFO L481 AbstractCegarLoop]: Abstraction has 22578 states and 35802 transitions. [2020-12-22 07:39:58,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 22578 states and 35802 transitions. [2020-12-22 07:39:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:58,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:58,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:58,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:58,133 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1502774817, now seen corresponding path program 1 times [2020-12-22 07:39:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061757952] [2020-12-22 07:39:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:58,194 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 07:39:58,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061757952] [2020-12-22 07:39:58,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:58,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:58,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96632585] [2020-12-22 07:39:58,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:58,197 INFO L87 Difference]: Start difference. First operand 22578 states and 35802 transitions. Second operand 3 states. [2020-12-22 07:39:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:59,669 INFO L93 Difference]: Finished difference Result 54911 states and 87576 transitions. [2020-12-22 07:39:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:59,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:59,851 INFO L225 Difference]: With dead ends: 54911 [2020-12-22 07:39:59,852 INFO L226 Difference]: Without dead ends: 32462 [2020-12-22 07:39:59,893 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 07:39:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32462 states. [2020-12-22 07:40:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32462 to 31186. [2020-12-22 07:40:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31186 states. [2020-12-22 07:40:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31186 states to 31186 states and 49355 transitions. [2020-12-22 07:40:01,442 INFO L78 Accepts]: Start accepts. Automaton has 31186 states and 49355 transitions. Word has length 78 [2020-12-22 07:40:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:01,442 INFO L481 AbstractCegarLoop]: Abstraction has 31186 states and 49355 transitions. [2020-12-22 07:40:01,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 31186 states and 49355 transitions. [2020-12-22 07:40:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:40:01,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:01,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:01,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:40:01,446 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -225322511, now seen corresponding path program 1 times [2020-12-22 07:40:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:01,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014981089] [2020-12-22 07:40:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:01,487 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 07:40:01,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014981089] [2020-12-22 07:40:01,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:01,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:01,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004227079] [2020-12-22 07:40:01,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:01,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:01,492 INFO L87 Difference]: Start difference. First operand 31186 states and 49355 transitions. Second operand 3 states. [2020-12-22 07:40:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:03,375 INFO L93 Difference]: Finished difference Result 93520 states and 148003 transitions. [2020-12-22 07:40:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:03,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:03,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:03,555 INFO L225 Difference]: With dead ends: 93520 [2020-12-22 07:40:03,556 INFO L226 Difference]: Without dead ends: 62362 [2020-12-22 07:40:03,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62362 states. [2020-12-22 07:40:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62362 to 31188. [2020-12-22 07:40:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31188 states. [2020-12-22 07:40:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31188 states to 31188 states and 49357 transitions. [2020-12-22 07:40:05,342 INFO L78 Accepts]: Start accepts. Automaton has 31188 states and 49357 transitions. Word has length 78 [2020-12-22 07:40:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:05,342 INFO L481 AbstractCegarLoop]: Abstraction has 31188 states and 49357 transitions. [2020-12-22 07:40:05,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 31188 states and 49357 transitions. [2020-12-22 07:40:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:40:05,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:05,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:05,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:40:05,344 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash -577611119, now seen corresponding path program 1 times [2020-12-22 07:40:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501374226] [2020-12-22 07:40:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:05,435 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 07:40:05,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501374226] [2020-12-22 07:40:05,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:05,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:05,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371530703] [2020-12-22 07:40:05,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:05,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:05,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:05,437 INFO L87 Difference]: Start difference. First operand 31188 states and 49357 transitions. Second operand 4 states. [2020-12-22 07:40:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:07,144 INFO L93 Difference]: Finished difference Result 92206 states and 145749 transitions. [2020-12-22 07:40:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:07,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:40:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:07,280 INFO L225 Difference]: With dead ends: 92206 [2020-12-22 07:40:07,280 INFO L226 Difference]: Without dead ends: 61048 [2020-12-22 07:40:07,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61048 states. [2020-12-22 07:40:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61048 to 61046. [2020-12-22 07:40:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61046 states. [2020-12-22 07:40:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61046 states to 61046 states and 95880 transitions. [2020-12-22 07:40:09,684 INFO L78 Accepts]: Start accepts. Automaton has 61046 states and 95880 transitions. Word has length 79 [2020-12-22 07:40:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:09,684 INFO L481 AbstractCegarLoop]: Abstraction has 61046 states and 95880 transitions. [2020-12-22 07:40:09,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61046 states and 95880 transitions. [2020-12-22 07:40:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:09,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:09,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:09,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:40:09,687 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1003564987, now seen corresponding path program 1 times [2020-12-22 07:40:09,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:09,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178857295] [2020-12-22 07:40:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:09,747 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 07:40:09,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178857295] [2020-12-22 07:40:09,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:09,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298208506] [2020-12-22 07:40:09,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:09,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:09,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:09,752 INFO L87 Difference]: Start difference. First operand 61046 states and 95880 transitions. Second operand 3 states. [2020-12-22 07:40:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:12,264 INFO L93 Difference]: Finished difference Result 148150 states and 233536 transitions. [2020-12-22 07:40:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:12,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:12,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:12,417 INFO L225 Difference]: With dead ends: 148150 [2020-12-22 07:40:12,417 INFO L226 Difference]: Without dead ends: 87384 [2020-12-22 07:40:12,469 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 07:40:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87384 states. [2020-12-22 07:40:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87384 to 84054. [2020-12-22 07:40:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84054 states. [2020-12-22 07:40:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84054 states to 84054 states and 131502 transitions. [2020-12-22 07:40:15,727 INFO L78 Accepts]: Start accepts. Automaton has 84054 states and 131502 transitions. Word has length 80 [2020-12-22 07:40:15,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:15,728 INFO L481 AbstractCegarLoop]: Abstraction has 84054 states and 131502 transitions. [2020-12-22 07:40:15,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 84054 states and 131502 transitions. [2020-12-22 07:40:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:15,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:15,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:15,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:15,730 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:15,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1064997795, now seen corresponding path program 1 times [2020-12-22 07:40:15,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:15,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585599834] [2020-12-22 07:40:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:15,761 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 07:40:15,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585599834] [2020-12-22 07:40:15,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:15,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:15,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667275251] [2020-12-22 07:40:15,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:15,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:15,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:15,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:15,763 INFO L87 Difference]: Start difference. First operand 84054 states and 131502 transitions. Second operand 3 states. [2020-12-22 07:40:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:20,439 INFO L93 Difference]: Finished difference Result 252086 states and 394386 transitions. [2020-12-22 07:40:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:20,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:20,935 INFO L225 Difference]: With dead ends: 252086 [2020-12-22 07:40:20,935 INFO L226 Difference]: Without dead ends: 168076 [2020-12-22 07:40:20,993 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 07:40:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168076 states. [2020-12-22 07:40:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168076 to 84058. [2020-12-22 07:40:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2020-12-22 07:40:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 131506 transitions. [2020-12-22 07:40:24,993 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 131506 transitions. Word has length 80 [2020-12-22 07:40:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:24,993 INFO L481 AbstractCegarLoop]: Abstraction has 84058 states and 131506 transitions. [2020-12-22 07:40:24,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 131506 transitions. [2020-12-22 07:40:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:40:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:24,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:24,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:24,995 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1530707325, now seen corresponding path program 1 times [2020-12-22 07:40:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:24,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958880398] [2020-12-22 07:40:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:25,096 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 07:40:25,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958880398] [2020-12-22 07:40:25,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:25,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:25,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846144064] [2020-12-22 07:40:25,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:25,099 INFO L87 Difference]: Start difference. First operand 84058 states and 131506 transitions. Second operand 4 states. [2020-12-22 07:40:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:30,336 INFO L93 Difference]: Finished difference Result 248426 states and 388114 transitions. [2020-12-22 07:40:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:30,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:40:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:30,830 INFO L225 Difference]: With dead ends: 248426 [2020-12-22 07:40:30,830 INFO L226 Difference]: Without dead ends: 164416 [2020-12-22 07:40:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164416 states. [2020-12-22 07:40:36,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164416 to 164414. [2020-12-22 07:40:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164414 states. [2020-12-22 07:40:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164414 states to 164414 states and 255112 transitions. [2020-12-22 07:40:37,604 INFO L78 Accepts]: Start accepts. Automaton has 164414 states and 255112 transitions. Word has length 81 [2020-12-22 07:40:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:37,604 INFO L481 AbstractCegarLoop]: Abstraction has 164414 states and 255112 transitions. [2020-12-22 07:40:37,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 164414 states and 255112 transitions. [2020-12-22 07:40:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:37,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:37,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:37,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:37,616 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1063976855, now seen corresponding path program 1 times [2020-12-22 07:40:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:37,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355294452] [2020-12-22 07:40:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:37,682 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 07:40:37,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355294452] [2020-12-22 07:40:37,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:37,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480820347] [2020-12-22 07:40:37,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:37,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:37,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:37,685 INFO L87 Difference]: Start difference. First operand 164414 states and 255112 transitions. Second operand 3 states. [2020-12-22 07:40:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:45,673 INFO L93 Difference]: Finished difference Result 399850 states and 623434 transitions. [2020-12-22 07:40:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:45,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:46,200 INFO L225 Difference]: With dead ends: 399850 [2020-12-22 07:40:46,200 INFO L226 Difference]: Without dead ends: 236000 [2020-12-22 07:40:46,309 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 07:40:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236000 states. [2020-12-22 07:40:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236000 to 225918. [2020-12-22 07:40:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225918 states. [2020-12-22 07:40:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225918 states to 225918 states and 348560 transitions. [2020-12-22 07:40:55,960 INFO L78 Accepts]: Start accepts. Automaton has 225918 states and 348560 transitions. Word has length 82 [2020-12-22 07:40:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:55,961 INFO L481 AbstractCegarLoop]: Abstraction has 225918 states and 348560 transitions. [2020-12-22 07:40:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 225918 states and 348560 transitions. [2020-12-22 07:40:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:55,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:55,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:55,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:55,964 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1085594423, now seen corresponding path program 1 times [2020-12-22 07:40:55,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:55,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553224806] [2020-12-22 07:40:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:56,016 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 07:40:56,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553224806] [2020-12-22 07:40:56,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:56,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556780690] [2020-12-22 07:40:56,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:56,019 INFO L87 Difference]: Start difference. First operand 225918 states and 348560 transitions. Second operand 3 states. [2020-12-22 07:41:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:11,215 INFO L93 Difference]: Finished difference Result 677330 states and 1045134 transitions. [2020-12-22 07:41:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:11,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:12,517 INFO L225 Difference]: With dead ends: 677330 [2020-12-22 07:41:12,517 INFO L226 Difference]: Without dead ends: 451744 [2020-12-22 07:41:12,768 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 07:41:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451744 states. [2020-12-22 07:41:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451744 to 225926. [2020-12-22 07:41:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225926 states. [2020-12-22 07:41:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225926 states to 225926 states and 348568 transitions. [2020-12-22 07:41:25,311 INFO L78 Accepts]: Start accepts. Automaton has 225926 states and 348568 transitions. Word has length 82 [2020-12-22 07:41:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:25,312 INFO L481 AbstractCegarLoop]: Abstraction has 225926 states and 348568 transitions. [2020-12-22 07:41:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 225926 states and 348568 transitions. [2020-12-22 07:41:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:25,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:25,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:25,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:25,315 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 762927108, now seen corresponding path program 1 times [2020-12-22 07:41:25,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654562710] [2020-12-22 07:41:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:25,468 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 07:41:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654562710] [2020-12-22 07:41:25,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:25,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643225815] [2020-12-22 07:41:25,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:25,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:25,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:25,470 INFO L87 Difference]: Start difference. First operand 225926 states and 348568 transitions. Second operand 5 states. [2020-12-22 07:41:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:42,594 INFO L93 Difference]: Finished difference Result 639120 states and 985393 transitions. [2020-12-22 07:41:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:42,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:41:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:43,614 INFO L225 Difference]: With dead ends: 639120 [2020-12-22 07:41:43,615 INFO L226 Difference]: Without dead ends: 413282 [2020-12-22 07:41:43,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413282 states. [2020-12-22 07:42:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413282 to 413280. [2020-12-22 07:42:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413280 states. [2020-12-22 07:42:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413280 states to 413280 states and 631969 transitions. [2020-12-22 07:42:03,705 INFO L78 Accepts]: Start accepts. Automaton has 413280 states and 631969 transitions. Word has length 83 [2020-12-22 07:42:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:03,708 INFO L481 AbstractCegarLoop]: Abstraction has 413280 states and 631969 transitions. [2020-12-22 07:42:03,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:42:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 413280 states and 631969 transitions. [2020-12-22 07:42:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:03,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:03,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:42:03,723 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1633117801, now seen corresponding path program 1 times [2020-12-22 07:42:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:03,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581345136] [2020-12-22 07:42:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:03,838 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 07:42:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581345136] [2020-12-22 07:42:03,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:03,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:03,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911595117] [2020-12-22 07:42:03,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:03,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:03,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:03,852 INFO L87 Difference]: Start difference. First operand 413280 states and 631969 transitions. Second operand 4 states. [2020-12-22 07:42:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:18,507 INFO L93 Difference]: Finished difference Result 734762 states and 1121587 transitions. [2020-12-22 07:42:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:18,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:42:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:19,240 INFO L225 Difference]: With dead ends: 734762 [2020-12-22 07:42:19,240 INFO L226 Difference]: Without dead ends: 321556 [2020-12-22 07:42:19,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321556 states. [2020-12-22 07:42:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321556 to 321556. [2020-12-22 07:42:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321556 states. [2020-12-22 07:42:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321556 states to 321556 states and 489721 transitions. [2020-12-22 07:42:35,021 INFO L78 Accepts]: Start accepts. Automaton has 321556 states and 489721 transitions. Word has length 83 [2020-12-22 07:42:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:35,022 INFO L481 AbstractCegarLoop]: Abstraction has 321556 states and 489721 transitions. [2020-12-22 07:42:35,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 321556 states and 489721 transitions. [2020-12-22 07:42:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:42:35,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:35,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:35,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:35,028 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash 960344718, now seen corresponding path program 1 times [2020-12-22 07:42:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:35,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273748725] [2020-12-22 07:42:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:35,150 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 07:42:35,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273748725] [2020-12-22 07:42:35,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:35,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669958814] [2020-12-22 07:42:35,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:35,152 INFO L87 Difference]: Start difference. First operand 321556 states and 489721 transitions. Second operand 4 states. [2020-12-22 07:42:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:59,497 INFO L93 Difference]: Finished difference Result 845180 states and 1286070 transitions. [2020-12-22 07:42:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:59,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:42:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:01,018 INFO L225 Difference]: With dead ends: 845180 [2020-12-22 07:43:01,018 INFO L226 Difference]: Without dead ends: 523756 [2020-12-22 07:43:01,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523756 states.