/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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:03:22,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:03:22,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:03:22,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:03:22,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:03:22,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:03:22,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:03:22,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:03:22,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:03:22,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:03:22,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:03:22,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:03:22,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:03:22,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:03:22,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:03:22,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:03:22,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:03:22,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:03:22,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:03:22,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:03:22,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:03:22,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:03:22,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:03:22,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:03:22,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:03:22,553 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:03:22,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:03:22,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:03:22,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:03:22,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:03:22,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:03:22,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:03:22,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:03:22,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:03:22,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:03:22,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:03:22,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:03:22,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:03:22,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:03:22,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:03:22,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:03:22,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:03:22,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:03:22,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:03:22,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:03:22,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:03:22,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:03:22,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:03:22,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:03:22,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:03:22,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:03:22,987 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:03:22,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:03:23,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f204dac0/5d7a80ed5527497ba447c80830e743ac/FLAGf6ebb47c6 [2020-12-22 08:03:23,863 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:03:23,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:03:23,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f204dac0/5d7a80ed5527497ba447c80830e743ac/FLAGf6ebb47c6 [2020-12-22 08:03:24,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f204dac0/5d7a80ed5527497ba447c80830e743ac [2020-12-22 08:03:24,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:03:24,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:03:24,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:03:24,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:03:24,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:03:24,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ba3fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24, skipping insertion in model container [2020-12-22 08:03:24,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:03:24,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:03:24,501 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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:03:24,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:03:24,556 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:03:24,613 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-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:03:24,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:03:24,667 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:03:24,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24 WrapperNode [2020-12-22 08:03:24,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:03:24,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:03:24,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:03:24,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:03:24,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:03:24,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:03:24,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:03:24,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:03:24,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... [2020-12-22 08:03:24,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:03:24,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:03:24,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:03:24,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:03:24,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:03:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:03:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:03:24,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:03:24,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:03:25,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:03:25,838 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:03:25,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:25 BoogieIcfgContainer [2020-12-22 08:03:25,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:03:25,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:03:25,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:03:25,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:03:25,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:03:24" (1/3) ... [2020-12-22 08:03:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56cf108d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:25, skipping insertion in model container [2020-12-22 08:03:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:03:24" (2/3) ... [2020-12-22 08:03:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56cf108d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:03:25, skipping insertion in model container [2020-12-22 08:03:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:03:25" (3/3) ... [2020-12-22 08:03:25,852 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:03:25,859 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:03:25,865 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:03:25,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:03:25,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:03:25,921 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:03:25,921 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:03:25,921 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:03:25,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:03:25,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:03:25,922 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:03:25,922 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:03:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-12-22 08:03:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:03:25,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:25,957 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] [2020-12-22 08:03:25,958 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2020-12-22 08:03:25,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:25,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839626376] [2020-12-22 08:03:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:26,428 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 08:03:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839626376] [2020-12-22 08:03:26,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:26,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:26,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594318782] [2020-12-22 08:03:26,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:26,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:26,457 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 3 states. [2020-12-22 08:03:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:26,619 INFO L93 Difference]: Finished difference Result 303 states and 512 transitions. [2020-12-22 08:03:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:26,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:03:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:26,638 INFO L225 Difference]: With dead ends: 303 [2020-12-22 08:03:26,638 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 08:03:26,642 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 08:03:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 08:03:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-12-22 08:03:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 08:03:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 327 transitions. [2020-12-22 08:03:26,721 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 327 transitions. Word has length 56 [2020-12-22 08:03:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:26,722 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 327 transitions. [2020-12-22 08:03:26,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 327 transitions. [2020-12-22 08:03:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:03:26,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:26,726 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] [2020-12-22 08:03:26,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:03:26,727 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2020-12-22 08:03:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:26,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118265692] [2020-12-22 08:03:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:26,897 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 08:03:26,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118265692] [2020-12-22 08:03:26,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:26,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:26,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486058692] [2020-12-22 08:03:26,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:26,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:26,902 INFO L87 Difference]: Start difference. First operand 208 states and 327 transitions. Second operand 3 states. [2020-12-22 08:03:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:27,003 INFO L93 Difference]: Finished difference Result 502 states and 811 transitions. [2020-12-22 08:03:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:27,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:03:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:27,012 INFO L225 Difference]: With dead ends: 502 [2020-12-22 08:03:27,012 INFO L226 Difference]: Without dead ends: 348 [2020-12-22 08:03:27,017 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 08:03:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-12-22 08:03:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2020-12-22 08:03:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 08:03:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 549 transitions. [2020-12-22 08:03:27,099 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 549 transitions. Word has length 58 [2020-12-22 08:03:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:27,102 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 549 transitions. [2020-12-22 08:03:27,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 549 transitions. [2020-12-22 08:03:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:03:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:27,110 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] [2020-12-22 08:03:27,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:03:27,110 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:27,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1017067947, now seen corresponding path program 1 times [2020-12-22 08:03:27,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:27,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386214578] [2020-12-22 08:03:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:27,246 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 08:03:27,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386214578] [2020-12-22 08:03:27,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:27,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:27,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719468569] [2020-12-22 08:03:27,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:27,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:27,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:27,249 INFO L87 Difference]: Start difference. First operand 344 states and 549 transitions. Second operand 3 states. [2020-12-22 08:03:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:27,310 INFO L93 Difference]: Finished difference Result 896 states and 1451 transitions. [2020-12-22 08:03:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:27,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:03:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:27,314 INFO L225 Difference]: With dead ends: 896 [2020-12-22 08:03:27,315 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 08:03:27,317 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 08:03:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 08:03:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2020-12-22 08:03:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-12-22 08:03:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 961 transitions. [2020-12-22 08:03:27,368 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 961 transitions. Word has length 60 [2020-12-22 08:03:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:27,369 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 961 transitions. [2020-12-22 08:03:27,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 961 transitions. [2020-12-22 08:03:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:03:27,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:27,374 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] [2020-12-22 08:03:27,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:03:27,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 291448600, now seen corresponding path program 1 times [2020-12-22 08:03:27,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:27,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446160426] [2020-12-22 08:03:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:27,539 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 08:03:27,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446160426] [2020-12-22 08:03:27,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:27,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143503376] [2020-12-22 08:03:27,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:27,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:27,545 INFO L87 Difference]: Start difference. First operand 600 states and 961 transitions. Second operand 5 states. [2020-12-22 08:03:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:27,796 INFO L93 Difference]: Finished difference Result 2148 states and 3509 transitions. [2020-12-22 08:03:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:27,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:03:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:27,809 INFO L225 Difference]: With dead ends: 2148 [2020-12-22 08:03:27,809 INFO L226 Difference]: Without dead ends: 1602 [2020-12-22 08:03:27,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2020-12-22 08:03:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1089. [2020-12-22 08:03:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-12-22 08:03:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1754 transitions. [2020-12-22 08:03:27,912 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1754 transitions. Word has length 62 [2020-12-22 08:03:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:27,914 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1754 transitions. [2020-12-22 08:03:27,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1754 transitions. [2020-12-22 08:03:27,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:03:27,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:27,918 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] [2020-12-22 08:03:27,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:03:27,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash 382467820, now seen corresponding path program 1 times [2020-12-22 08:03:27,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:27,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106338200] [2020-12-22 08:03:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:28,024 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 08:03:28,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106338200] [2020-12-22 08:03:28,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:28,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689830111] [2020-12-22 08:03:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:28,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:28,029 INFO L87 Difference]: Start difference. First operand 1089 states and 1754 transitions. Second operand 4 states. [2020-12-22 08:03:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:28,208 INFO L93 Difference]: Finished difference Result 2874 states and 4692 transitions. [2020-12-22 08:03:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:28,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 08:03:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:28,220 INFO L225 Difference]: With dead ends: 2874 [2020-12-22 08:03:28,220 INFO L226 Difference]: Without dead ends: 1839 [2020-12-22 08:03:28,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2020-12-22 08:03:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1601. [2020-12-22 08:03:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2020-12-22 08:03:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2595 transitions. [2020-12-22 08:03:28,371 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2595 transitions. Word has length 63 [2020-12-22 08:03:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:28,371 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 2595 transitions. [2020-12-22 08:03:28,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2595 transitions. [2020-12-22 08:03:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:03:28,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:28,374 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] [2020-12-22 08:03:28,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:03:28,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1086345633, now seen corresponding path program 1 times [2020-12-22 08:03:28,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:28,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570891181] [2020-12-22 08:03:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:28,439 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 08:03:28,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570891181] [2020-12-22 08:03:28,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:28,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:28,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157402094] [2020-12-22 08:03:28,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:28,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:28,442 INFO L87 Difference]: Start difference. First operand 1601 states and 2595 transitions. Second operand 4 states. [2020-12-22 08:03:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:28,691 INFO L93 Difference]: Finished difference Result 4202 states and 6864 transitions. [2020-12-22 08:03:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:28,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:03:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:28,707 INFO L225 Difference]: With dead ends: 4202 [2020-12-22 08:03:28,707 INFO L226 Difference]: Without dead ends: 2655 [2020-12-22 08:03:28,711 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 08:03:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2020-12-22 08:03:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2336. [2020-12-22 08:03:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2020-12-22 08:03:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3787 transitions. [2020-12-22 08:03:28,912 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3787 transitions. Word has length 64 [2020-12-22 08:03:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:28,912 INFO L481 AbstractCegarLoop]: Abstraction has 2336 states and 3787 transitions. [2020-12-22 08:03:28,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3787 transitions. [2020-12-22 08:03:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:28,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:28,915 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] [2020-12-22 08:03:28,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:03:28,915 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1879078355, now seen corresponding path program 1 times [2020-12-22 08:03:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:28,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145031378] [2020-12-22 08:03:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:29,020 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 08:03:29,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145031378] [2020-12-22 08:03:29,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:29,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:29,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343997755] [2020-12-22 08:03:29,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:29,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:29,035 INFO L87 Difference]: Start difference. First operand 2336 states and 3787 transitions. Second operand 3 states. [2020-12-22 08:03:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:29,294 INFO L93 Difference]: Finished difference Result 5150 states and 8392 transitions. [2020-12-22 08:03:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:29,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:03:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:29,314 INFO L225 Difference]: With dead ends: 5150 [2020-12-22 08:03:29,314 INFO L226 Difference]: Without dead ends: 3529 [2020-12-22 08:03:29,318 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 08:03:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2020-12-22 08:03:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3527. [2020-12-22 08:03:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3527 states. [2020-12-22 08:03:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 5708 transitions. [2020-12-22 08:03:29,547 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 5708 transitions. Word has length 65 [2020-12-22 08:03:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:29,547 INFO L481 AbstractCegarLoop]: Abstraction has 3527 states and 5708 transitions. [2020-12-22 08:03:29,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 5708 transitions. [2020-12-22 08:03:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:29,549 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] [2020-12-22 08:03:29,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:03:29,549 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -450865020, now seen corresponding path program 1 times [2020-12-22 08:03:29,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:29,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731051540] [2020-12-22 08:03:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:29,606 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 08:03:29,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731051540] [2020-12-22 08:03:29,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:29,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:29,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205843415] [2020-12-22 08:03:29,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:29,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:29,609 INFO L87 Difference]: Start difference. First operand 3527 states and 5708 transitions. Second operand 3 states. [2020-12-22 08:03:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:29,895 INFO L93 Difference]: Finished difference Result 6985 states and 11358 transitions. [2020-12-22 08:03:29,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:29,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:03:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:29,923 INFO L225 Difference]: With dead ends: 6985 [2020-12-22 08:03:29,924 INFO L226 Difference]: Without dead ends: 4965 [2020-12-22 08:03:29,930 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 08:03:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2020-12-22 08:03:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 4963. [2020-12-22 08:03:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4963 states. [2020-12-22 08:03:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 8011 transitions. [2020-12-22 08:03:30,278 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 8011 transitions. Word has length 65 [2020-12-22 08:03:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:30,278 INFO L481 AbstractCegarLoop]: Abstraction has 4963 states and 8011 transitions. [2020-12-22 08:03:30,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 8011 transitions. [2020-12-22 08:03:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:30,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:30,284 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] [2020-12-22 08:03:30,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:03:30,284 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 629635603, now seen corresponding path program 1 times [2020-12-22 08:03:30,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:30,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712881183] [2020-12-22 08:03:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:30,385 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 08:03:30,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712881183] [2020-12-22 08:03:30,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:30,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:30,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661580829] [2020-12-22 08:03:30,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:30,388 INFO L87 Difference]: Start difference. First operand 4963 states and 8011 transitions. Second operand 4 states. [2020-12-22 08:03:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:30,991 INFO L93 Difference]: Finished difference Result 13573 states and 22049 transitions. [2020-12-22 08:03:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:30,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:03:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:31,051 INFO L225 Difference]: With dead ends: 13573 [2020-12-22 08:03:31,051 INFO L226 Difference]: Without dead ends: 8744 [2020-12-22 08:03:31,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2020-12-22 08:03:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7677. [2020-12-22 08:03:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7677 states. [2020-12-22 08:03:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 12369 transitions. [2020-12-22 08:03:31,626 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 12369 transitions. Word has length 65 [2020-12-22 08:03:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:31,626 INFO L481 AbstractCegarLoop]: Abstraction has 7677 states and 12369 transitions. [2020-12-22 08:03:31,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 12369 transitions. [2020-12-22 08:03:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:31,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:31,631 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] [2020-12-22 08:03:31,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:03:31,632 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1734684554, now seen corresponding path program 1 times [2020-12-22 08:03:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:31,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862430927] [2020-12-22 08:03:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:31,685 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 08:03:31,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862430927] [2020-12-22 08:03:31,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:31,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:31,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765191675] [2020-12-22 08:03:31,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:31,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:31,692 INFO L87 Difference]: Start difference. First operand 7677 states and 12369 transitions. Second operand 3 states. [2020-12-22 08:03:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:32,299 INFO L93 Difference]: Finished difference Result 16751 states and 27364 transitions. [2020-12-22 08:03:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:32,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:03:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:32,349 INFO L225 Difference]: With dead ends: 16751 [2020-12-22 08:03:32,349 INFO L226 Difference]: Without dead ends: 11226 [2020-12-22 08:03:32,360 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 08:03:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11226 states. [2020-12-22 08:03:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11226 to 11224. [2020-12-22 08:03:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:03:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18145 transitions. [2020-12-22 08:03:33,158 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18145 transitions. Word has length 65 [2020-12-22 08:03:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:33,159 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18145 transitions. [2020-12-22 08:03:33,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18145 transitions. [2020-12-22 08:03:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:03:33,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:33,160 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] [2020-12-22 08:03:33,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:03:33,160 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2027885532, now seen corresponding path program 1 times [2020-12-22 08:03:33,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:33,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888804389] [2020-12-22 08:03:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:33,323 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 08:03:33,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888804389] [2020-12-22 08:03:33,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:33,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:33,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942307615] [2020-12-22 08:03:33,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:33,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:33,328 INFO L87 Difference]: Start difference. First operand 11224 states and 18145 transitions. Second operand 5 states. [2020-12-22 08:03:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:34,500 INFO L93 Difference]: Finished difference Result 26414 states and 42938 transitions. [2020-12-22 08:03:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:34,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:03:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:34,542 INFO L225 Difference]: With dead ends: 26414 [2020-12-22 08:03:34,543 INFO L226 Difference]: Without dead ends: 15271 [2020-12-22 08:03:34,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15271 states. [2020-12-22 08:03:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15271 to 11224. [2020-12-22 08:03:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11224 states. [2020-12-22 08:03:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11224 states to 11224 states and 18020 transitions. [2020-12-22 08:03:35,417 INFO L78 Accepts]: Start accepts. Automaton has 11224 states and 18020 transitions. Word has length 67 [2020-12-22 08:03:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:35,418 INFO L481 AbstractCegarLoop]: Abstraction has 11224 states and 18020 transitions. [2020-12-22 08:03:35,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 11224 states and 18020 transitions. [2020-12-22 08:03:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:03:35,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:35,419 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 08:03:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:03:35,420 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1776446511, now seen corresponding path program 1 times [2020-12-22 08:03:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736223343] [2020-12-22 08:03:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:35,616 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 08:03:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736223343] [2020-12-22 08:03:35,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:35,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96343641] [2020-12-22 08:03:35,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:35,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:35,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:35,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:35,619 INFO L87 Difference]: Start difference. First operand 11224 states and 18020 transitions. Second operand 5 states. [2020-12-22 08:03:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:37,319 INFO L93 Difference]: Finished difference Result 35257 states and 57017 transitions. [2020-12-22 08:03:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:37,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 08:03:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:37,382 INFO L225 Difference]: With dead ends: 35257 [2020-12-22 08:03:37,383 INFO L226 Difference]: Without dead ends: 24114 [2020-12-22 08:03:37,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24114 states. [2020-12-22 08:03:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24114 to 16142. [2020-12-22 08:03:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16142 states. [2020-12-22 08:03:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16142 states to 16142 states and 25907 transitions. [2020-12-22 08:03:38,890 INFO L78 Accepts]: Start accepts. Automaton has 16142 states and 25907 transitions. Word has length 70 [2020-12-22 08:03:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:38,890 INFO L481 AbstractCegarLoop]: Abstraction has 16142 states and 25907 transitions. [2020-12-22 08:03:38,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 16142 states and 25907 transitions. [2020-12-22 08:03:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:03:38,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:38,891 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] [2020-12-22 08:03:38,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:03:38,892 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash 762823713, now seen corresponding path program 1 times [2020-12-22 08:03:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:38,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82956578] [2020-12-22 08:03:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:39,023 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 08:03:39,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82956578] [2020-12-22 08:03:39,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720834036] [2020-12-22 08:03:39,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:39,026 INFO L87 Difference]: Start difference. First operand 16142 states and 25907 transitions. Second operand 5 states. [2020-12-22 08:03:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:40,828 INFO L93 Difference]: Finished difference Result 32386 states and 51688 transitions. [2020-12-22 08:03:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:03:40,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 08:03:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:40,927 INFO L225 Difference]: With dead ends: 32386 [2020-12-22 08:03:40,927 INFO L226 Difference]: Without dead ends: 32384 [2020-12-22 08:03:40,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:03:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2020-12-22 08:03:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 16766. [2020-12-22 08:03:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16766 states. [2020-12-22 08:03:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 26522 transitions. [2020-12-22 08:03:42,685 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 26522 transitions. Word has length 71 [2020-12-22 08:03:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:42,685 INFO L481 AbstractCegarLoop]: Abstraction has 16766 states and 26522 transitions. [2020-12-22 08:03:42,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 26522 transitions. [2020-12-22 08:03:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:03:42,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:42,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:42,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:03:42,689 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1613729099, now seen corresponding path program 1 times [2020-12-22 08:03:42,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:42,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674123218] [2020-12-22 08:03:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:03:42,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674123218] [2020-12-22 08:03:42,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:42,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944349435] [2020-12-22 08:03:42,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:42,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:42,801 INFO L87 Difference]: Start difference. First operand 16766 states and 26522 transitions. Second operand 5 states. [2020-12-22 08:03:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:44,281 INFO L93 Difference]: Finished difference Result 24558 states and 39250 transitions. [2020-12-22 08:03:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:44,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:03:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:44,333 INFO L225 Difference]: With dead ends: 24558 [2020-12-22 08:03:44,333 INFO L226 Difference]: Without dead ends: 19386 [2020-12-22 08:03:44,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19386 states. [2020-12-22 08:03:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19386 to 18334. [2020-12-22 08:03:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18334 states. [2020-12-22 08:03:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18334 states to 18334 states and 28980 transitions. [2020-12-22 08:03:46,000 INFO L78 Accepts]: Start accepts. Automaton has 18334 states and 28980 transitions. Word has length 93 [2020-12-22 08:03:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:46,000 INFO L481 AbstractCegarLoop]: Abstraction has 18334 states and 28980 transitions. [2020-12-22 08:03:46,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 18334 states and 28980 transitions. [2020-12-22 08:03:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:03:46,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:46,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:46,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:03:46,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash 351294822, now seen corresponding path program 1 times [2020-12-22 08:03:46,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:46,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874087531] [2020-12-22 08:03:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 08:03:46,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874087531] [2020-12-22 08:03:46,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:46,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:46,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697225249] [2020-12-22 08:03:46,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:46,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:46,119 INFO L87 Difference]: Start difference. First operand 18334 states and 28980 transitions. Second operand 5 states. [2020-12-22 08:03:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:47,506 INFO L93 Difference]: Finished difference Result 25592 states and 40770 transitions. [2020-12-22 08:03:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:47,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:03:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:47,547 INFO L225 Difference]: With dead ends: 25592 [2020-12-22 08:03:47,548 INFO L226 Difference]: Without dead ends: 20420 [2020-12-22 08:03:47,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20420 states. [2020-12-22 08:03:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20420 to 19998. [2020-12-22 08:03:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19998 states. [2020-12-22 08:03:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 31664 transitions. [2020-12-22 08:03:49,026 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 31664 transitions. Word has length 93 [2020-12-22 08:03:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:49,026 INFO L481 AbstractCegarLoop]: Abstraction has 19998 states and 31664 transitions. [2020-12-22 08:03:49,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 31664 transitions. [2020-12-22 08:03:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:03:49,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:49,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:49,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:03:49,029 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1758122900, now seen corresponding path program 1 times [2020-12-22 08:03:49,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:49,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410156566] [2020-12-22 08:03:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:03:49,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410156566] [2020-12-22 08:03:49,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:49,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:49,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661209417] [2020-12-22 08:03:49,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:49,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:49,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:49,125 INFO L87 Difference]: Start difference. First operand 19998 states and 31664 transitions. Second operand 5 states. [2020-12-22 08:03:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:51,160 INFO L93 Difference]: Finished difference Result 28944 states and 46288 transitions. [2020-12-22 08:03:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:51,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:03:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:51,206 INFO L225 Difference]: With dead ends: 28944 [2020-12-22 08:03:51,207 INFO L226 Difference]: Without dead ends: 23732 [2020-12-22 08:03:51,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23732 states. [2020-12-22 08:03:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23732 to 21670. [2020-12-22 08:03:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21670 states. [2020-12-22 08:03:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21670 states to 21670 states and 34380 transitions. [2020-12-22 08:03:52,798 INFO L78 Accepts]: Start accepts. Automaton has 21670 states and 34380 transitions. Word has length 93 [2020-12-22 08:03:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:52,798 INFO L481 AbstractCegarLoop]: Abstraction has 21670 states and 34380 transitions. [2020-12-22 08:03:52,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21670 states and 34380 transitions. [2020-12-22 08:03:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:03:52,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:52,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:52,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:03:52,802 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1270260760, now seen corresponding path program 1 times [2020-12-22 08:03:52,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:52,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719168868] [2020-12-22 08:03:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:03:52,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719168868] [2020-12-22 08:03:52,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:52,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:52,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37459123] [2020-12-22 08:03:52,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:52,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:52,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:52,887 INFO L87 Difference]: Start difference. First operand 21670 states and 34380 transitions. Second operand 4 states. [2020-12-22 08:03:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:54,932 INFO L93 Difference]: Finished difference Result 31922 states and 51155 transitions. [2020-12-22 08:03:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:54,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 08:03:54,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:54,970 INFO L225 Difference]: With dead ends: 31922 [2020-12-22 08:03:54,970 INFO L226 Difference]: Without dead ends: 25038 [2020-12-22 08:03:54,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25038 states. [2020-12-22 08:03:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25038 to 24210. [2020-12-22 08:03:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24210 states. [2020-12-22 08:03:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24210 states to 24210 states and 38482 transitions. [2020-12-22 08:03:56,750 INFO L78 Accepts]: Start accepts. Automaton has 24210 states and 38482 transitions. Word has length 94 [2020-12-22 08:03:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:56,750 INFO L481 AbstractCegarLoop]: Abstraction has 24210 states and 38482 transitions. [2020-12-22 08:03:56,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24210 states and 38482 transitions. [2020-12-22 08:03:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:03:56,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:56,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:56,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:03:56,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:56,755 INFO L82 PathProgramCache]: Analyzing trace with hash 36164624, now seen corresponding path program 1 times [2020-12-22 08:03:56,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:56,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285392006] [2020-12-22 08:03:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:03:56,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285392006] [2020-12-22 08:03:56,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:56,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915016916] [2020-12-22 08:03:56,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:56,819 INFO L87 Difference]: Start difference. First operand 24210 states and 38482 transitions. Second operand 3 states. [2020-12-22 08:03:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:59,452 INFO L93 Difference]: Finished difference Result 49303 states and 78944 transitions. [2020-12-22 08:03:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:59,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:03:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:59,510 INFO L225 Difference]: With dead ends: 49303 [2020-12-22 08:03:59,510 INFO L226 Difference]: Without dead ends: 40359 [2020-12-22 08:03:59,524 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 08:03:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40359 states. [2020-12-22 08:04:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40359 to 40300. [2020-12-22 08:04:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40300 states. [2020-12-22 08:04:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40300 states to 40300 states and 64214 transitions. [2020-12-22 08:04:02,753 INFO L78 Accepts]: Start accepts. Automaton has 40300 states and 64214 transitions. Word has length 94 [2020-12-22 08:04:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:02,753 INFO L481 AbstractCegarLoop]: Abstraction has 40300 states and 64214 transitions. [2020-12-22 08:04:02,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 40300 states and 64214 transitions. [2020-12-22 08:04:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:04:02,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:02,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:02,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:04:02,757 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:02,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1988921020, now seen corresponding path program 1 times [2020-12-22 08:04:02,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:02,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830639463] [2020-12-22 08:04:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:04:02,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830639463] [2020-12-22 08:04:02,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:02,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:02,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608763999] [2020-12-22 08:04:02,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:02,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:02,921 INFO L87 Difference]: Start difference. First operand 40300 states and 64214 transitions. Second operand 4 states. [2020-12-22 08:04:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:06,455 INFO L93 Difference]: Finished difference Result 57260 states and 91609 transitions. [2020-12-22 08:04:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:06,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 08:04:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:06,518 INFO L225 Difference]: With dead ends: 57260 [2020-12-22 08:04:06,518 INFO L226 Difference]: Without dead ends: 45534 [2020-12-22 08:04:06,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45534 states. [2020-12-22 08:04:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45534 to 43058. [2020-12-22 08:04:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43058 states. [2020-12-22 08:04:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43058 states to 43058 states and 68570 transitions. [2020-12-22 08:04:10,069 INFO L78 Accepts]: Start accepts. Automaton has 43058 states and 68570 transitions. Word has length 95 [2020-12-22 08:04:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:10,069 INFO L481 AbstractCegarLoop]: Abstraction has 43058 states and 68570 transitions. [2020-12-22 08:04:10,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 43058 states and 68570 transitions. [2020-12-22 08:04:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:04:10,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:10,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:10,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:04:10,073 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1437742065, now seen corresponding path program 1 times [2020-12-22 08:04:10,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:10,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109755057] [2020-12-22 08:04:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:04:10,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109755057] [2020-12-22 08:04:10,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:10,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:10,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056681245] [2020-12-22 08:04:10,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:10,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:10,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:10,133 INFO L87 Difference]: Start difference. First operand 43058 states and 68570 transitions. Second operand 3 states. [2020-12-22 08:04:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:15,557 INFO L93 Difference]: Finished difference Result 87287 states and 139480 transitions. [2020-12-22 08:04:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:15,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:04:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:15,666 INFO L225 Difference]: With dead ends: 87287 [2020-12-22 08:04:15,666 INFO L226 Difference]: Without dead ends: 70167 [2020-12-22 08:04:15,689 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 08:04:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70167 states. [2020-12-22 08:04:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70167 to 70066. [2020-12-22 08:04:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70066 states. [2020-12-22 08:04:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70066 states to 70066 states and 111450 transitions. [2020-12-22 08:04:21,611 INFO L78 Accepts]: Start accepts. Automaton has 70066 states and 111450 transitions. Word has length 95 [2020-12-22 08:04:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:21,611 INFO L481 AbstractCegarLoop]: Abstraction has 70066 states and 111450 transitions. [2020-12-22 08:04:21,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 70066 states and 111450 transitions. [2020-12-22 08:04:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:04:21,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:21,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:21,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:04:21,616 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1035854142, now seen corresponding path program 1 times [2020-12-22 08:04:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:21,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788151193] [2020-12-22 08:04:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:21,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788151193] [2020-12-22 08:04:21,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:21,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888070428] [2020-12-22 08:04:21,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:21,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:21,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:21,684 INFO L87 Difference]: Start difference. First operand 70066 states and 111450 transitions. Second operand 3 states. [2020-12-22 08:04:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:32,791 INFO L93 Difference]: Finished difference Result 206536 states and 328555 transitions. [2020-12-22 08:04:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:32,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:04:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:33,071 INFO L225 Difference]: With dead ends: 206536 [2020-12-22 08:04:33,072 INFO L226 Difference]: Without dead ends: 136540 [2020-12-22 08:04:33,150 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 08:04:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136540 states. [2020-12-22 08:04:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136540 to 136538. [2020-12-22 08:04:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136538 states. [2020-12-22 08:04:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136538 states to 136538 states and 215845 transitions. [2020-12-22 08:04:44,377 INFO L78 Accepts]: Start accepts. Automaton has 136538 states and 215845 transitions. Word has length 95 [2020-12-22 08:04:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:44,377 INFO L481 AbstractCegarLoop]: Abstraction has 136538 states and 215845 transitions. [2020-12-22 08:04:44,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 136538 states and 215845 transitions. [2020-12-22 08:04:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:04:44,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:44,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:44,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:04:44,384 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1015816888, now seen corresponding path program 1 times [2020-12-22 08:04:44,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:44,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718893779] [2020-12-22 08:04:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:44,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718893779] [2020-12-22 08:04:44,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:44,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:44,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250377709] [2020-12-22 08:04:44,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:44,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:44,454 INFO L87 Difference]: Start difference. First operand 136538 states and 215845 transitions. Second operand 3 states. [2020-12-22 08:05:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:06,181 INFO L93 Difference]: Finished difference Result 401922 states and 635406 transitions. [2020-12-22 08:05:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:06,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:05:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:06,752 INFO L225 Difference]: With dead ends: 401922 [2020-12-22 08:05:06,752 INFO L226 Difference]: Without dead ends: 265521 [2020-12-22 08:05:06,909 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 08:05:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265521 states. [2020-12-22 08:05:27,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265521 to 265519. [2020-12-22 08:05:27,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265519 states. [2020-12-22 08:05:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265519 states to 265519 states and 416931 transitions. [2020-12-22 08:05:28,960 INFO L78 Accepts]: Start accepts. Automaton has 265519 states and 416931 transitions. Word has length 95 [2020-12-22 08:05:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:28,961 INFO L481 AbstractCegarLoop]: Abstraction has 265519 states and 416931 transitions. [2020-12-22 08:05:28,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 265519 states and 416931 transitions. [2020-12-22 08:05:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 08:05:28,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:28,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:28,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:05:28,969 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash 393120711, now seen corresponding path program 1 times [2020-12-22 08:05:28,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:28,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954724412] [2020-12-22 08:05:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:05:29,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954724412] [2020-12-22 08:05:29,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:29,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:29,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386182269] [2020-12-22 08:05:29,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:29,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:29,071 INFO L87 Difference]: Start difference. First operand 265519 states and 416931 transitions. Second operand 3 states. [2020-12-22 08:05:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:50,225 INFO L93 Difference]: Finished difference Result 507275 states and 798803 transitions. [2020-12-22 08:05:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:50,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 08:05:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:50,756 INFO L225 Difference]: With dead ends: 507275 [2020-12-22 08:05:50,756 INFO L226 Difference]: Without dead ends: 242017 [2020-12-22 08:05:50,955 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 08:05:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242017 states.