/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.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:05:40,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:05:40,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:05:41,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:05:41,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:05:41,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:05:41,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:05:41,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:05:41,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:05:41,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:05:41,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:05:41,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:05:41,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:05:41,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:05:41,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:05:41,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:05:41,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:05:41,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:05:41,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:05:41,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:05:41,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:05:41,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:05:41,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:05:41,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:05:41,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:05:41,192 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:05:41,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:05:41,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:05:41,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:05:41,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:05:41,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:05:41,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:05:41,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:05:41,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:05:41,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:05:41,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:05:41,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:05:41,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:05:41,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:05:41,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:05:41,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:05:41,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:05:41,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:05:41,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:05:41,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:05:41,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:05:41,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:05:41,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:05:41,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:05:41,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:05:41,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:05:41,653 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:05:41,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:05:41,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9fc52a3/2a8a63060d744b2482f7c6c567a4a61e/FLAG57cbbe671 [2020-12-22 08:05:42,482 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:05:42,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:05:42,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9fc52a3/2a8a63060d744b2482f7c6c567a4a61e/FLAG57cbbe671 [2020-12-22 08:05:42,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c9fc52a3/2a8a63060d744b2482f7c6c567a4a61e [2020-12-22 08:05:42,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:05:42,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:05:42,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:42,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:05:42,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:05:42,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:42" (1/1) ... [2020-12-22 08:05:42,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@702e5f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:42, skipping insertion in model container [2020-12-22 08:05:42,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:42" (1/1) ... [2020-12-22 08:05:42,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:05:42,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:05:43,120 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.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6829,6842] [2020-12-22 08:05:43,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:43,172 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:05:43,238 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.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6829,6842] [2020-12-22 08:05:43,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:43,328 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:05:43,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43 WrapperNode [2020-12-22 08:05:43,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:43,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:43,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:05:43,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:05:43,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:43,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:05:43,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:05:43,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:05:43,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (1/1) ... [2020-12-22 08:05:43,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:05:43,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:05:43,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:05:43,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:05:43,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (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 08:05:43,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:05:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:05:43,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:05:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:05:44,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:05:44,494 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:05:44,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:44 BoogieIcfgContainer [2020-12-22 08:05:44,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:05:44,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:05:44,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:05:44,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:05:44,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:05:42" (1/3) ... [2020-12-22 08:05:44,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67674c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:44, skipping insertion in model container [2020-12-22 08:05:44,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:43" (2/3) ... [2020-12-22 08:05:44,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67674c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:44, skipping insertion in model container [2020-12-22 08:05:44,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:44" (3/3) ... [2020-12-22 08:05:44,507 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:05:44,514 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:05:44,520 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:05:44,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:05:44,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:05:44,572 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:05:44,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:05:44,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:05:44,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:05:44,573 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:05:44,573 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:05:44,573 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:05:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-12-22 08:05:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:05:44,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:44,607 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] [2020-12-22 08:05:44,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1933157835, now seen corresponding path program 1 times [2020-12-22 08:05:44,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:44,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630612908] [2020-12-22 08:05:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:45,139 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 08:05:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630612908] [2020-12-22 08:05:45,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:45,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179704803] [2020-12-22 08:05:45,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:45,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:45,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:45,175 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-12-22 08:05:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:45,347 INFO L93 Difference]: Finished difference Result 288 states and 491 transitions. [2020-12-22 08:05:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:45,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:05:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:45,375 INFO L225 Difference]: With dead ends: 288 [2020-12-22 08:05:45,375 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 08:05:45,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:05:45,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 08:05:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-12-22 08:05:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 08:05:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 313 transitions. [2020-12-22 08:05:45,451 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 313 transitions. Word has length 57 [2020-12-22 08:05:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:45,452 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 313 transitions. [2020-12-22 08:05:45,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 313 transitions. [2020-12-22 08:05:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:05:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:45,456 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] [2020-12-22 08:05:45,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:05:45,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1883490782, now seen corresponding path program 1 times [2020-12-22 08:05:45,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170492613] [2020-12-22 08:05:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:45,683 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 08:05:45,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170492613] [2020-12-22 08:05:45,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:45,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887321554] [2020-12-22 08:05:45,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:45,689 INFO L87 Difference]: Start difference. First operand 199 states and 313 transitions. Second operand 3 states. [2020-12-22 08:05:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:45,784 INFO L93 Difference]: Finished difference Result 475 states and 769 transitions. [2020-12-22 08:05:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:45,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:05:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:45,793 INFO L225 Difference]: With dead ends: 475 [2020-12-22 08:05:45,793 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 08:05:45,795 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 08:05:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 08:05:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2020-12-22 08:05:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 08:05:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2020-12-22 08:05:45,880 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 59 [2020-12-22 08:05:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:45,883 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2020-12-22 08:05:45,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2020-12-22 08:05:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:05:45,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:45,890 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] [2020-12-22 08:05:45,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:05:45,891 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -111872728, now seen corresponding path program 1 times [2020-12-22 08:05:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:45,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648030284] [2020-12-22 08:05:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:46,054 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 08:05:46,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648030284] [2020-12-22 08:05:46,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:46,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275895189] [2020-12-22 08:05:46,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:46,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:46,064 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand 3 states. [2020-12-22 08:05:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:46,137 INFO L93 Difference]: Finished difference Result 603 states and 981 transitions. [2020-12-22 08:05:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:46,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:05:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:46,143 INFO L225 Difference]: With dead ends: 603 [2020-12-22 08:05:46,143 INFO L226 Difference]: Without dead ends: 458 [2020-12-22 08:05:46,144 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 08:05:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-22 08:05:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-12-22 08:05:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-22 08:05:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 735 transitions. [2020-12-22 08:05:46,183 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 735 transitions. Word has length 61 [2020-12-22 08:05:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:46,183 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 735 transitions. [2020-12-22 08:05:46,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 735 transitions. [2020-12-22 08:05:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:05:46,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:46,186 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] [2020-12-22 08:05:46,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:05:46,187 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1275396395, now seen corresponding path program 1 times [2020-12-22 08:05:46,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:46,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360840930] [2020-12-22 08:05:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:46,262 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 08:05:46,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360840930] [2020-12-22 08:05:46,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:46,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:46,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404876988] [2020-12-22 08:05:46,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:46,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:46,265 INFO L87 Difference]: Start difference. First operand 456 states and 735 transitions. Second operand 3 states. [2020-12-22 08:05:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:46,321 INFO L93 Difference]: Finished difference Result 1172 states and 1911 transitions. [2020-12-22 08:05:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:46,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:05:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:46,327 INFO L225 Difference]: With dead ends: 1172 [2020-12-22 08:05:46,328 INFO L226 Difference]: Without dead ends: 793 [2020-12-22 08:05:46,330 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 08:05:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-22 08:05:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 791. [2020-12-22 08:05:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-12-22 08:05:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1277 transitions. [2020-12-22 08:05:46,374 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1277 transitions. Word has length 61 [2020-12-22 08:05:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:46,375 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1277 transitions. [2020-12-22 08:05:46,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1277 transitions. [2020-12-22 08:05:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:05:46,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:46,418 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 08:05:46,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:05:46,419 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1280827262, now seen corresponding path program 1 times [2020-12-22 08:05:46,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:46,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787327256] [2020-12-22 08:05:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:46,519 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 08:05:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787327256] [2020-12-22 08:05:46,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:46,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:46,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458343142] [2020-12-22 08:05:46,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:46,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:46,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:46,522 INFO L87 Difference]: Start difference. First operand 791 states and 1277 transitions. Second operand 5 states. [2020-12-22 08:05:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:46,729 INFO L93 Difference]: Finished difference Result 2945 states and 4837 transitions. [2020-12-22 08:05:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:46,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:05:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:46,743 INFO L225 Difference]: With dead ends: 2945 [2020-12-22 08:05:46,743 INFO L226 Difference]: Without dead ends: 2231 [2020-12-22 08:05:46,746 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 08:05:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-12-22 08:05:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1452. [2020-12-22 08:05:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2020-12-22 08:05:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2348 transitions. [2020-12-22 08:05:46,848 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2348 transitions. Word has length 63 [2020-12-22 08:05:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:46,848 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 2348 transitions. [2020-12-22 08:05:46,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2348 transitions. [2020-12-22 08:05:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:05:46,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:46,851 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 08:05:46,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:05:46,851 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1113443658, now seen corresponding path program 1 times [2020-12-22 08:05:46,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:46,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369824500] [2020-12-22 08:05:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:46,958 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 08:05:46,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369824500] [2020-12-22 08:05:46,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:46,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463273607] [2020-12-22 08:05:46,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:46,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:46,963 INFO L87 Difference]: Start difference. First operand 1452 states and 2348 transitions. Second operand 4 states. [2020-12-22 08:05:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:47,180 INFO L93 Difference]: Finished difference Result 3856 states and 6322 transitions. [2020-12-22 08:05:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:47,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:05:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:47,194 INFO L225 Difference]: With dead ends: 3856 [2020-12-22 08:05:47,194 INFO L226 Difference]: Without dead ends: 2483 [2020-12-22 08:05:47,198 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 08:05:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2020-12-22 08:05:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2147. [2020-12-22 08:05:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-12-22 08:05:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3491 transitions. [2020-12-22 08:05:47,360 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3491 transitions. Word has length 64 [2020-12-22 08:05:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:47,361 INFO L481 AbstractCegarLoop]: Abstraction has 2147 states and 3491 transitions. [2020-12-22 08:05:47,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3491 transitions. [2020-12-22 08:05:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:05:47,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:47,364 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 08:05:47,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:05:47,365 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1248232611, now seen corresponding path program 1 times [2020-12-22 08:05:47,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:47,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348765252] [2020-12-22 08:05:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:47,498 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 08:05:47,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348765252] [2020-12-22 08:05:47,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:47,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533947412] [2020-12-22 08:05:47,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:47,501 INFO L87 Difference]: Start difference. First operand 2147 states and 3491 transitions. Second operand 3 states. [2020-12-22 08:05:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:47,680 INFO L93 Difference]: Finished difference Result 4165 states and 6807 transitions. [2020-12-22 08:05:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:47,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:05:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:47,696 INFO L225 Difference]: With dead ends: 4165 [2020-12-22 08:05:47,697 INFO L226 Difference]: Without dead ends: 3011 [2020-12-22 08:05:47,703 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 08:05:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2020-12-22 08:05:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 3009. [2020-12-22 08:05:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-12-22 08:05:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4878 transitions. [2020-12-22 08:05:47,933 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4878 transitions. Word has length 64 [2020-12-22 08:05:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:47,933 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 4878 transitions. [2020-12-22 08:05:47,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4878 transitions. [2020-12-22 08:05:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:05:47,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:47,936 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 08:05:47,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:05:47,937 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 616386787, now seen corresponding path program 1 times [2020-12-22 08:05:47,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:47,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911803191] [2020-12-22 08:05:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:48,000 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 08:05:48,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911803191] [2020-12-22 08:05:48,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:48,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99674352] [2020-12-22 08:05:48,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:48,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:48,004 INFO L87 Difference]: Start difference. First operand 3009 states and 4878 transitions. Second operand 3 states. [2020-12-22 08:05:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:48,264 INFO L93 Difference]: Finished difference Result 6431 states and 10590 transitions. [2020-12-22 08:05:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:48,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:05:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:48,288 INFO L225 Difference]: With dead ends: 6431 [2020-12-22 08:05:48,288 INFO L226 Difference]: Without dead ends: 4345 [2020-12-22 08:05:48,293 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 08:05:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2020-12-22 08:05:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 4343. [2020-12-22 08:05:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4343 states. [2020-12-22 08:05:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 7079 transitions. [2020-12-22 08:05:48,590 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 7079 transitions. Word has length 64 [2020-12-22 08:05:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:48,590 INFO L481 AbstractCegarLoop]: Abstraction has 4343 states and 7079 transitions. [2020-12-22 08:05:48,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 7079 transitions. [2020-12-22 08:05:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:05:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:48,594 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 08:05:48,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:05:48,595 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash -214961207, now seen corresponding path program 1 times [2020-12-22 08:05:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:48,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830407408] [2020-12-22 08:05:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:48,692 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 08:05:48,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830407408] [2020-12-22 08:05:48,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794159314] [2020-12-22 08:05:48,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:48,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:48,695 INFO L87 Difference]: Start difference. First operand 4343 states and 7079 transitions. Second operand 4 states. [2020-12-22 08:05:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:49,188 INFO L93 Difference]: Finished difference Result 12351 states and 20249 transitions. [2020-12-22 08:05:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:49,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:05:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:49,248 INFO L225 Difference]: With dead ends: 12351 [2020-12-22 08:05:49,249 INFO L226 Difference]: Without dead ends: 8090 [2020-12-22 08:05:49,259 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 08:05:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2020-12-22 08:05:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 6911. [2020-12-22 08:05:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6911 states. [2020-12-22 08:05:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6911 states to 6911 states and 11221 transitions. [2020-12-22 08:05:49,751 INFO L78 Accepts]: Start accepts. Automaton has 6911 states and 11221 transitions. Word has length 65 [2020-12-22 08:05:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:49,751 INFO L481 AbstractCegarLoop]: Abstraction has 6911 states and 11221 transitions. [2020-12-22 08:05:49,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6911 states and 11221 transitions. [2020-12-22 08:05:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:05:49,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:49,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:49,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:05:49,757 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1872749021, now seen corresponding path program 1 times [2020-12-22 08:05:49,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:49,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931546847] [2020-12-22 08:05:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:49,893 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 08:05:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931546847] [2020-12-22 08:05:49,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:49,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064203500] [2020-12-22 08:05:49,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:49,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:49,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:49,900 INFO L87 Difference]: Start difference. First operand 6911 states and 11221 transitions. Second operand 4 states. [2020-12-22 08:05:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:50,783 INFO L93 Difference]: Finished difference Result 19177 states and 31299 transitions. [2020-12-22 08:05:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:50,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 08:05:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:50,828 INFO L225 Difference]: With dead ends: 19177 [2020-12-22 08:05:50,829 INFO L226 Difference]: Without dead ends: 12348 [2020-12-22 08:05:50,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 08:05:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12348 states. [2020-12-22 08:05:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12348 to 10779. [2020-12-22 08:05:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:05:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17427 transitions. [2020-12-22 08:05:51,479 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17427 transitions. Word has length 66 [2020-12-22 08:05:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:51,479 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17427 transitions. [2020-12-22 08:05:51,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17427 transitions. [2020-12-22 08:05:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:05:51,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:51,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:51,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:05:51,481 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1396799506, now seen corresponding path program 1 times [2020-12-22 08:05:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:51,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182877844] [2020-12-22 08:05:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:51,641 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 08:05:51,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182877844] [2020-12-22 08:05:51,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:51,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:51,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957892197] [2020-12-22 08:05:51,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:51,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:51,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:51,646 INFO L87 Difference]: Start difference. First operand 10779 states and 17427 transitions. Second operand 5 states. [2020-12-22 08:05:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:52,788 INFO L93 Difference]: Finished difference Result 25359 states and 41228 transitions. [2020-12-22 08:05:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:52,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:05:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:52,830 INFO L225 Difference]: With dead ends: 25359 [2020-12-22 08:05:52,830 INFO L226 Difference]: Without dead ends: 14662 [2020-12-22 08:05:52,850 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 08:05:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14662 states. [2020-12-22 08:05:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14662 to 10779. [2020-12-22 08:05:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:05:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17302 transitions. [2020-12-22 08:05:53,631 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17302 transitions. Word has length 68 [2020-12-22 08:05:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:53,632 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17302 transitions. [2020-12-22 08:05:53,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17302 transitions. [2020-12-22 08:05:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:05:53,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:53,633 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 08:05:53,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:05:53,634 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash -164512453, now seen corresponding path program 1 times [2020-12-22 08:05:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:53,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157442368] [2020-12-22 08:05:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:53,741 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 08:05:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157442368] [2020-12-22 08:05:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298691908] [2020-12-22 08:05:53,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:53,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:53,744 INFO L87 Difference]: Start difference. First operand 10779 states and 17302 transitions. Second operand 4 states. [2020-12-22 08:05:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:55,344 INFO L93 Difference]: Finished difference Result 31699 states and 50901 transitions. [2020-12-22 08:05:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:55,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 08:05:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:55,498 INFO L225 Difference]: With dead ends: 31699 [2020-12-22 08:05:55,499 INFO L226 Difference]: Without dead ends: 20929 [2020-12-22 08:05:55,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20929 states. [2020-12-22 08:05:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20929 to 20927. [2020-12-22 08:05:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20927 states. [2020-12-22 08:05:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20927 states to 20927 states and 33387 transitions. [2020-12-22 08:05:56,695 INFO L78 Accepts]: Start accepts. Automaton has 20927 states and 33387 transitions. Word has length 71 [2020-12-22 08:05:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:56,695 INFO L481 AbstractCegarLoop]: Abstraction has 20927 states and 33387 transitions. [2020-12-22 08:05:56,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20927 states and 33387 transitions. [2020-12-22 08:05:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:05:56,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:56,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:56,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:05:56,697 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash 667892135, now seen corresponding path program 1 times [2020-12-22 08:05:56,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:56,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137961893] [2020-12-22 08:05:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:56,736 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 08:05:56,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137961893] [2020-12-22 08:05:56,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:56,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:56,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073089502] [2020-12-22 08:05:56,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:56,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:56,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:56,739 INFO L87 Difference]: Start difference. First operand 20927 states and 33387 transitions. Second operand 3 states. [2020-12-22 08:05:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:58,867 INFO L93 Difference]: Finished difference Result 62743 states and 100099 transitions. [2020-12-22 08:05:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:58,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:05:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:58,994 INFO L225 Difference]: With dead ends: 62743 [2020-12-22 08:05:58,995 INFO L226 Difference]: Without dead ends: 41844 [2020-12-22 08:05:59,039 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 08:05:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41844 states. [2020-12-22 08:06:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41844 to 20929. [2020-12-22 08:06:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20929 states. [2020-12-22 08:06:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 33389 transitions. [2020-12-22 08:06:01,016 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 33389 transitions. Word has length 72 [2020-12-22 08:06:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:01,017 INFO L481 AbstractCegarLoop]: Abstraction has 20929 states and 33389 transitions. [2020-12-22 08:06:01,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 33389 transitions. [2020-12-22 08:06:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:06:01,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:01,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:01,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:06:01,019 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -808520295, now seen corresponding path program 1 times [2020-12-22 08:06:01,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:01,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213298049] [2020-12-22 08:06:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:01,125 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 08:06:01,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213298049] [2020-12-22 08:06:01,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:01,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660659305] [2020-12-22 08:06:01,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:01,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:01,129 INFO L87 Difference]: Start difference. First operand 20929 states and 33389 transitions. Second operand 3 states. [2020-12-22 08:06:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:03,553 INFO L93 Difference]: Finished difference Result 61383 states and 97998 transitions. [2020-12-22 08:06:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:03,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:06:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:03,659 INFO L225 Difference]: With dead ends: 61383 [2020-12-22 08:06:03,660 INFO L226 Difference]: Without dead ends: 40610 [2020-12-22 08:06:03,697 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 08:06:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2020-12-22 08:06:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 40608. [2020-12-22 08:06:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40608 states. [2020-12-22 08:06:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40608 states to 40608 states and 64369 transitions. [2020-12-22 08:06:06,725 INFO L78 Accepts]: Start accepts. Automaton has 40608 states and 64369 transitions. Word has length 73 [2020-12-22 08:06:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:06,725 INFO L481 AbstractCegarLoop]: Abstraction has 40608 states and 64369 transitions. [2020-12-22 08:06:06,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 40608 states and 64369 transitions. [2020-12-22 08:06:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:06:06,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:06,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:06,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:06:06,727 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1547459556, now seen corresponding path program 1 times [2020-12-22 08:06:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:06,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198161254] [2020-12-22 08:06:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:06,881 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 08:06:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198161254] [2020-12-22 08:06:06,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:06,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:06,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772050818] [2020-12-22 08:06:06,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:06,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:06,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:06,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:06,885 INFO L87 Difference]: Start difference. First operand 40608 states and 64369 transitions. Second operand 5 states. [2020-12-22 08:06:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:12,626 INFO L93 Difference]: Finished difference Result 119148 states and 188934 transitions. [2020-12-22 08:06:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:12,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 08:06:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:12,792 INFO L225 Difference]: With dead ends: 119148 [2020-12-22 08:06:12,793 INFO L226 Difference]: Without dead ends: 78554 [2020-12-22 08:06:12,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78554 states. [2020-12-22 08:06:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78554 to 78552. [2020-12-22 08:06:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78552 states. [2020-12-22 08:06:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78552 states to 78552 states and 123683 transitions. [2020-12-22 08:06:18,240 INFO L78 Accepts]: Start accepts. Automaton has 78552 states and 123683 transitions. Word has length 73 [2020-12-22 08:06:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:18,241 INFO L481 AbstractCegarLoop]: Abstraction has 78552 states and 123683 transitions. [2020-12-22 08:06:18,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 78552 states and 123683 transitions. [2020-12-22 08:06:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:06:18,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:18,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:18,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:06:18,243 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1975872346, now seen corresponding path program 1 times [2020-12-22 08:06:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:18,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907471105] [2020-12-22 08:06:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:18,326 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 08:06:18,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907471105] [2020-12-22 08:06:18,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:18,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369887154] [2020-12-22 08:06:18,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:18,329 INFO L87 Difference]: Start difference. First operand 78552 states and 123683 transitions. Second operand 4 states. [2020-12-22 08:06:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:29,195 INFO L93 Difference]: Finished difference Result 230583 states and 363068 transitions. [2020-12-22 08:06:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:29,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 08:06:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:29,685 INFO L225 Difference]: With dead ends: 230583 [2020-12-22 08:06:29,685 INFO L226 Difference]: Without dead ends: 152087 [2020-12-22 08:06:29,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152087 states. [2020-12-22 08:06:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152087 to 152085. [2020-12-22 08:06:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152085 states. [2020-12-22 08:06:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152085 states to 152085 states and 237673 transitions. [2020-12-22 08:06:40,654 INFO L78 Accepts]: Start accepts. Automaton has 152085 states and 237673 transitions. Word has length 73 [2020-12-22 08:06:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:40,655 INFO L481 AbstractCegarLoop]: Abstraction has 152085 states and 237673 transitions. [2020-12-22 08:06:40,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 152085 states and 237673 transitions. [2020-12-22 08:06:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:06:40,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:40,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:40,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:06:40,659 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2004902810, now seen corresponding path program 1 times [2020-12-22 08:06:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:40,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818582905] [2020-12-22 08:06:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:40,691 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 08:06:40,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818582905] [2020-12-22 08:06:40,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:40,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:40,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723309896] [2020-12-22 08:06:40,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:40,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:40,693 INFO L87 Difference]: Start difference. First operand 152085 states and 237673 transitions. Second operand 3 states. [2020-12-22 08:07:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:01,666 INFO L93 Difference]: Finished difference Result 456103 states and 712786 transitions. [2020-12-22 08:07:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:01,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:07:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:02,350 INFO L225 Difference]: With dead ends: 456103 [2020-12-22 08:07:02,353 INFO L226 Difference]: Without dead ends: 304109 [2020-12-22 08:07:02,538 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 08:07:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304109 states. [2020-12-22 08:07:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304109 to 152095. [2020-12-22 08:07:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152095 states. [2020-12-22 08:07:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152095 states to 152095 states and 237683 transitions. [2020-12-22 08:07:16,299 INFO L78 Accepts]: Start accepts. Automaton has 152095 states and 237683 transitions. Word has length 74 [2020-12-22 08:07:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:16,299 INFO L481 AbstractCegarLoop]: Abstraction has 152095 states and 237683 transitions. [2020-12-22 08:07:16,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 152095 states and 237683 transitions. [2020-12-22 08:07:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:07:16,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:16,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:16,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:07:16,303 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997191, now seen corresponding path program 1 times [2020-12-22 08:07:16,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:16,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93378567] [2020-12-22 08:07:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:16,399 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 08:07:16,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93378567] [2020-12-22 08:07:16,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:16,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545055484] [2020-12-22 08:07:16,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:16,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:16,402 INFO L87 Difference]: Start difference. First operand 152095 states and 237683 transitions. Second operand 4 states. [2020-12-22 08:07:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:40,559 INFO L93 Difference]: Finished difference Result 446123 states and 697112 transitions. [2020-12-22 08:07:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:40,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 08:07:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:41,273 INFO L225 Difference]: With dead ends: 446123 [2020-12-22 08:07:41,273 INFO L226 Difference]: Without dead ends: 294129 [2020-12-22 08:07:41,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294129 states.