/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:39:43,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:39:43,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:39:43,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:39:43,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:39:43,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:39:43,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:39:43,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:39:43,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:39:43,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:39:43,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:39:43,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:39:43,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:39:43,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:39:43,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:39:43,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:39:43,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:39:43,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:39:43,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:39:43,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:39:43,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:39:43,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:39:43,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:39:43,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:39:43,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:39:43,712 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:39:43,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:39:43,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:39:43,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:39:43,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:39:43,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:39:43,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:39:43,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:39:43,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:39:43,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:39:43,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:39:43,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:39:43,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:39:43,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:43,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:39:43,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:39:43,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:39:43,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:39:43,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:39:43,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:39:43,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:39:43,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:39:44,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:39:44,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:39:44,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:39:44,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:39:44,182 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:39:44,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:44,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e73fe4fe/8e54bb266d2942e1bcf8ba59ce1e19f3/FLAG24230f546 [2020-12-22 07:39:44,962 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:39:44,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:44,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e73fe4fe/8e54bb266d2942e1bcf8ba59ce1e19f3/FLAG24230f546 [2020-12-22 07:39:45,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e73fe4fe/8e54bb266d2942e1bcf8ba59ce1e19f3 [2020-12-22 07:39:45,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:39:45,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:39:45,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:45,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:39:45,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:39:45,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:45,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af25f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45, skipping insertion in model container [2020-12-22 07:39:45,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:45,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:39:45,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:39:45,655 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:45,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:45,677 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:39:45,824 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c[14373,14386] [2020-12-22 07:39:45,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:39:45,860 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:39:45,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45 WrapperNode [2020-12-22 07:39:45,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:39:45,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:45,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:39:45,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:39:45,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:45,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:39:46,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:39:46,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:39:46,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:39:46,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... [2020-12-22 07:39:46,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:39:46,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:39:46,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:39:46,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:39:46,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:39:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:39:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:39:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:39:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:39:47,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:39:47,262 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:39:47,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:47 BoogieIcfgContainer [2020-12-22 07:39:47,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:39:47,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:39:47,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:39:47,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:39:47,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:39:45" (1/3) ... [2020-12-22 07:39:47,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1a23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:47, skipping insertion in model container [2020-12-22 07:39:47,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:39:45" (2/3) ... [2020-12-22 07:39:47,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b1a23c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:39:47, skipping insertion in model container [2020-12-22 07:39:47,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:39:47" (3/3) ... [2020-12-22 07:39:47,273 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c [2020-12-22 07:39:47,283 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:39:47,290 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:39:47,310 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:39:47,339 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:39:47,339 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:39:47,339 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:39:47,340 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:39:47,340 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:39:47,340 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:39:47,340 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:39:47,340 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:39:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-12-22 07:39:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:47,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:47,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:47,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:47,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1418405445, now seen corresponding path program 1 times [2020-12-22 07:39:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:47,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414084591] [2020-12-22 07:39:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414084591] [2020-12-22 07:39:47,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:47,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:39:47,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560827762] [2020-12-22 07:39:47,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:39:47,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:39:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:47,659 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 2 states. [2020-12-22 07:39:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:47,693 INFO L93 Difference]: Finished difference Result 227 states and 388 transitions. [2020-12-22 07:39:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:39:47,694 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:39:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:47,707 INFO L225 Difference]: With dead ends: 227 [2020-12-22 07:39:47,708 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:47,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:39:47,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-12-22 07:39:47,764 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 37 [2020-12-22 07:39:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-12-22 07:39:47,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:39:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-12-22 07:39:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:39:47,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:47,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:47,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:39:47,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2058913401, now seen corresponding path program 1 times [2020-12-22 07:39:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:47,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582096544] [2020-12-22 07:39:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:47,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582096544] [2020-12-22 07:39:47,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:47,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:47,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287254937] [2020-12-22 07:39:48,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:48,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:48,005 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 5 states. [2020-12-22 07:39:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:48,221 INFO L93 Difference]: Finished difference Result 222 states and 378 transitions. [2020-12-22 07:39:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:39:48,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:39:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:48,229 INFO L225 Difference]: With dead ends: 222 [2020-12-22 07:39:48,230 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 07:39:48,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 07:39:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 07:39:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 07:39:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 211 transitions. [2020-12-22 07:39:48,263 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 211 transitions. Word has length 37 [2020-12-22 07:39:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,263 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 211 transitions. [2020-12-22 07:39:48,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 211 transitions. [2020-12-22 07:39:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:39:48,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:48,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:39:48,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -415118785, now seen corresponding path program 1 times [2020-12-22 07:39:48,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269805801] [2020-12-22 07:39:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:48,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269805801] [2020-12-22 07:39:48,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:48,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:48,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030471257] [2020-12-22 07:39:48,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:48,435 INFO L87 Difference]: Start difference. First operand 139 states and 211 transitions. Second operand 3 states. [2020-12-22 07:39:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:48,508 INFO L93 Difference]: Finished difference Result 287 states and 459 transitions. [2020-12-22 07:39:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:48,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:39:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:48,511 INFO L225 Difference]: With dead ends: 287 [2020-12-22 07:39:48,512 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 07:39:48,513 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 07:39:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 07:39:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-12-22 07:39:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-22 07:39:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-12-22 07:39:48,541 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 66 [2020-12-22 07:39:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,542 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-12-22 07:39:48,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-12-22 07:39:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:39:48,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:48,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:39:48,552 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash 928134868, now seen corresponding path program 1 times [2020-12-22 07:39:48,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012787827] [2020-12-22 07:39:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012787827] [2020-12-22 07:39:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122717995] [2020-12-22 07:39:48,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:48,710 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 3 states. [2020-12-22 07:39:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:48,764 INFO L93 Difference]: Finished difference Result 482 states and 776 transitions. [2020-12-22 07:39:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:48,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:39:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:48,770 INFO L225 Difference]: With dead ends: 482 [2020-12-22 07:39:48,770 INFO L226 Difference]: Without dead ends: 336 [2020-12-22 07:39:48,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-22 07:39:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2020-12-22 07:39:48,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-22 07:39:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 531 transitions. [2020-12-22 07:39:48,817 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 531 transitions. Word has length 68 [2020-12-22 07:39:48,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:48,817 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 531 transitions. [2020-12-22 07:39:48,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 531 transitions. [2020-12-22 07:39:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:39:48,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:48,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:48,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:39:48,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1295175881, now seen corresponding path program 1 times [2020-12-22 07:39:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:48,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24131149] [2020-12-22 07:39:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:48,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24131149] [2020-12-22 07:39:48,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:48,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626237100] [2020-12-22 07:39:48,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:48,930 INFO L87 Difference]: Start difference. First operand 334 states and 531 transitions. Second operand 3 states. [2020-12-22 07:39:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:48,976 INFO L93 Difference]: Finished difference Result 850 states and 1381 transitions. [2020-12-22 07:39:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:48,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:39:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:48,983 INFO L225 Difference]: With dead ends: 850 [2020-12-22 07:39:48,984 INFO L226 Difference]: Without dead ends: 576 [2020-12-22 07:39:48,986 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 07:39:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-12-22 07:39:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-12-22 07:39:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-12-22 07:39:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 923 transitions. [2020-12-22 07:39:49,033 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 923 transitions. Word has length 70 [2020-12-22 07:39:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:49,034 INFO L481 AbstractCegarLoop]: Abstraction has 574 states and 923 transitions. [2020-12-22 07:39:49,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 923 transitions. [2020-12-22 07:39:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:39:49,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:49,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:49,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:39:49,038 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash -367652834, now seen corresponding path program 1 times [2020-12-22 07:39:49,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:49,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683027362] [2020-12-22 07:39:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:49,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683027362] [2020-12-22 07:39:49,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:49,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:39:49,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428417450] [2020-12-22 07:39:49,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:39:49,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:39:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:49,187 INFO L87 Difference]: Start difference. First operand 574 states and 923 transitions. Second operand 5 states. [2020-12-22 07:39:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:49,427 INFO L93 Difference]: Finished difference Result 2176 states and 3592 transitions. [2020-12-22 07:39:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:39:49,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:39:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:49,438 INFO L225 Difference]: With dead ends: 2176 [2020-12-22 07:39:49,439 INFO L226 Difference]: Without dead ends: 1662 [2020-12-22 07:39:49,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:39:49,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2020-12-22 07:39:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1023. [2020-12-22 07:39:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2020-12-22 07:39:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1661 transitions. [2020-12-22 07:39:49,499 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1661 transitions. Word has length 72 [2020-12-22 07:39:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:49,500 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1661 transitions. [2020-12-22 07:39:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:39:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1661 transitions. [2020-12-22 07:39:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:39:49,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:49,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:49,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:39:49,503 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash -435168554, now seen corresponding path program 1 times [2020-12-22 07:39:49,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:49,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742813957] [2020-12-22 07:39:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:49,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742813957] [2020-12-22 07:39:49,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:49,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:49,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726962419] [2020-12-22 07:39:49,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:49,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:49,658 INFO L87 Difference]: Start difference. First operand 1023 states and 1661 transitions. Second operand 4 states. [2020-12-22 07:39:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:49,793 INFO L93 Difference]: Finished difference Result 2972 states and 4898 transitions. [2020-12-22 07:39:49,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:49,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:39:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:49,806 INFO L225 Difference]: With dead ends: 2972 [2020-12-22 07:39:49,807 INFO L226 Difference]: Without dead ends: 2009 [2020-12-22 07:39:49,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2020-12-22 07:39:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1507. [2020-12-22 07:39:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2020-12-22 07:39:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2459 transitions. [2020-12-22 07:39:49,886 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2459 transitions. Word has length 73 [2020-12-22 07:39:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:49,886 INFO L481 AbstractCegarLoop]: Abstraction has 1507 states and 2459 transitions. [2020-12-22 07:39:49,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2459 transitions. [2020-12-22 07:39:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:49,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:49,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:49,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:39:49,890 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash 152415701, now seen corresponding path program 1 times [2020-12-22 07:39:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513459764] [2020-12-22 07:39:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:49,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513459764] [2020-12-22 07:39:49,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:49,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723978246] [2020-12-22 07:39:49,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:49,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:49,975 INFO L87 Difference]: Start difference. First operand 1507 states and 2459 transitions. Second operand 3 states. [2020-12-22 07:39:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:50,082 INFO L93 Difference]: Finished difference Result 2973 states and 4868 transitions. [2020-12-22 07:39:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:50,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:50,094 INFO L225 Difference]: With dead ends: 2973 [2020-12-22 07:39:50,094 INFO L226 Difference]: Without dead ends: 2147 [2020-12-22 07:39:50,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2020-12-22 07:39:50,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 2145. [2020-12-22 07:39:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2020-12-22 07:39:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3484 transitions. [2020-12-22 07:39:50,187 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3484 transitions. Word has length 74 [2020-12-22 07:39:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:50,188 INFO L481 AbstractCegarLoop]: Abstraction has 2145 states and 3484 transitions. [2020-12-22 07:39:50,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3484 transitions. [2020-12-22 07:39:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:50,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:50,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:39:50,190 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1935815765, now seen corresponding path program 1 times [2020-12-22 07:39:50,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074727416] [2020-12-22 07:39:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:50,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074727416] [2020-12-22 07:39:50,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:50,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:50,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663569080] [2020-12-22 07:39:50,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:50,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:50,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:50,301 INFO L87 Difference]: Start difference. First operand 2145 states and 3484 transitions. Second operand 4 states. [2020-12-22 07:39:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:50,548 INFO L93 Difference]: Finished difference Result 6648 states and 10865 transitions. [2020-12-22 07:39:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:50,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:39:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:50,575 INFO L225 Difference]: With dead ends: 6648 [2020-12-22 07:39:50,575 INFO L226 Difference]: Without dead ends: 4593 [2020-12-22 07:39:50,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2020-12-22 07:39:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 3357. [2020-12-22 07:39:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3357 states. [2020-12-22 07:39:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3357 states to 3357 states and 5442 transitions. [2020-12-22 07:39:50,796 INFO L78 Accepts]: Start accepts. Automaton has 3357 states and 5442 transitions. Word has length 74 [2020-12-22 07:39:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:50,800 INFO L481 AbstractCegarLoop]: Abstraction has 3357 states and 5442 transitions. [2020-12-22 07:39:50,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3357 states and 5442 transitions. [2020-12-22 07:39:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:50,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:50,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:39:50,803 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2130170379, now seen corresponding path program 1 times [2020-12-22 07:39:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:50,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819563695] [2020-12-22 07:39:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:50,881 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 07:39:50,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819563695] [2020-12-22 07:39:50,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:50,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177652205] [2020-12-22 07:39:50,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:50,883 INFO L87 Difference]: Start difference. First operand 3357 states and 5442 transitions. Second operand 3 states. [2020-12-22 07:39:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,043 INFO L93 Difference]: Finished difference Result 6689 states and 10862 transitions. [2020-12-22 07:39:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,071 INFO L225 Difference]: With dead ends: 6689 [2020-12-22 07:39:51,072 INFO L226 Difference]: Without dead ends: 4777 [2020-12-22 07:39:51,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2020-12-22 07:39:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4775. [2020-12-22 07:39:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2020-12-22 07:39:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 7690 transitions. [2020-12-22 07:39:51,319 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 7690 transitions. Word has length 74 [2020-12-22 07:39:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:51,320 INFO L481 AbstractCegarLoop]: Abstraction has 4775 states and 7690 transitions. [2020-12-22 07:39:51,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 7690 transitions. [2020-12-22 07:39:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:39:51,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:51,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:51,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:39:51,322 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:51,322 INFO L82 PathProgramCache]: Analyzing trace with hash -478186893, now seen corresponding path program 1 times [2020-12-22 07:39:51,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:51,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211209514] [2020-12-22 07:39:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:51,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211209514] [2020-12-22 07:39:51,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:51,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:51,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001374932] [2020-12-22 07:39:51,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:51,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,386 INFO L87 Difference]: Start difference. First operand 4775 states and 7690 transitions. Second operand 3 states. [2020-12-22 07:39:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:51,669 INFO L93 Difference]: Finished difference Result 10486 states and 17043 transitions. [2020-12-22 07:39:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:51,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 07:39:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:51,730 INFO L225 Difference]: With dead ends: 10486 [2020-12-22 07:39:51,731 INFO L226 Difference]: Without dead ends: 7079 [2020-12-22 07:39:51,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2020-12-22 07:39:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7077. [2020-12-22 07:39:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7077 states. [2020-12-22 07:39:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 11375 transitions. [2020-12-22 07:39:52,116 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 11375 transitions. Word has length 74 [2020-12-22 07:39:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:52,116 INFO L481 AbstractCegarLoop]: Abstraction has 7077 states and 11375 transitions. [2020-12-22 07:39:52,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 11375 transitions. [2020-12-22 07:39:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:39:52,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:52,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:52,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:39:52,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1704077331, now seen corresponding path program 1 times [2020-12-22 07:39:52,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:52,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198809190] [2020-12-22 07:39:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:52,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198809190] [2020-12-22 07:39:52,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:52,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:52,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637363037] [2020-12-22 07:39:52,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:52,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:52,242 INFO L87 Difference]: Start difference. First operand 7077 states and 11375 transitions. Second operand 4 states. [2020-12-22 07:39:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:52,889 INFO L93 Difference]: Finished difference Result 22184 states and 35744 transitions. [2020-12-22 07:39:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:52,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:39:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:52,928 INFO L225 Difference]: With dead ends: 22184 [2020-12-22 07:39:52,928 INFO L226 Difference]: Without dead ends: 15193 [2020-12-22 07:39:52,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:52,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2020-12-22 07:39:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 11092. [2020-12-22 07:39:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11092 states. [2020-12-22 07:39:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 17724 transitions. [2020-12-22 07:39:53,549 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 17724 transitions. Word has length 75 [2020-12-22 07:39:53,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:53,549 INFO L481 AbstractCegarLoop]: Abstraction has 11092 states and 17724 transitions. [2020-12-22 07:39:53,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 17724 transitions. [2020-12-22 07:39:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:39:53,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:53,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:53,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:39:53,552 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 931672261, now seen corresponding path program 1 times [2020-12-22 07:39:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:53,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620820665] [2020-12-22 07:39:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:53,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620820665] [2020-12-22 07:39:53,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:53,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:39:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111791279] [2020-12-22 07:39:53,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:39:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:53,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:39:53,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:39:53,753 INFO L87 Difference]: Start difference. First operand 11092 states and 17724 transitions. Second operand 4 states. [2020-12-22 07:39:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:54,622 INFO L93 Difference]: Finished difference Result 32771 states and 52300 transitions. [2020-12-22 07:39:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:39:54,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:39:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:54,676 INFO L225 Difference]: With dead ends: 32771 [2020-12-22 07:39:54,677 INFO L226 Difference]: Without dead ends: 21688 [2020-12-22 07:39:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:39:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21688 states. [2020-12-22 07:39:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21688 to 21686. [2020-12-22 07:39:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21686 states. [2020-12-22 07:39:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21686 states to 21686 states and 34364 transitions. [2020-12-22 07:39:55,674 INFO L78 Accepts]: Start accepts. Automaton has 21686 states and 34364 transitions. Word has length 77 [2020-12-22 07:39:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:55,676 INFO L481 AbstractCegarLoop]: Abstraction has 21686 states and 34364 transitions. [2020-12-22 07:39:55,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:39:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21686 states and 34364 transitions. [2020-12-22 07:39:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:55,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:55,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:55,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:39:55,679 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:55,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1466579386, now seen corresponding path program 1 times [2020-12-22 07:39:55,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:55,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637913311] [2020-12-22 07:39:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637913311] [2020-12-22 07:39:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:55,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020920585] [2020-12-22 07:39:55,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:55,736 INFO L87 Difference]: Start difference. First operand 21686 states and 34364 transitions. Second operand 3 states. [2020-12-22 07:39:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:56,957 INFO L93 Difference]: Finished difference Result 52581 states and 83824 transitions. [2020-12-22 07:39:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:39:56,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:39:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:57,038 INFO L225 Difference]: With dead ends: 52581 [2020-12-22 07:39:57,039 INFO L226 Difference]: Without dead ends: 31024 [2020-12-22 07:39:57,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2020-12-22 07:39:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 30112. [2020-12-22 07:39:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30112 states. [2020-12-22 07:39:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30112 states to 30112 states and 47587 transitions. [2020-12-22 07:39:58,464 INFO L78 Accepts]: Start accepts. Automaton has 30112 states and 47587 transitions. Word has length 78 [2020-12-22 07:39:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:39:58,464 INFO L481 AbstractCegarLoop]: Abstraction has 30112 states and 47587 transitions. [2020-12-22 07:39:58,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:39:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30112 states and 47587 transitions. [2020-12-22 07:39:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:39:58,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:39:58,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:39:58,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:39:58,467 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:39:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:39:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash 295226641, now seen corresponding path program 1 times [2020-12-22 07:39:58,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:39:58,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145403336] [2020-12-22 07:39:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:39:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:39:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:39:58,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145403336] [2020-12-22 07:39:58,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:39:58,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:39:58,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838551591] [2020-12-22 07:39:58,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:39:58,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:39:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:39:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:39:58,547 INFO L87 Difference]: Start difference. First operand 30112 states and 47587 transitions. Second operand 3 states. [2020-12-22 07:40:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:00,039 INFO L93 Difference]: Finished difference Result 90298 states and 142699 transitions. [2020-12-22 07:40:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:00,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:40:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:00,198 INFO L225 Difference]: With dead ends: 90298 [2020-12-22 07:40:00,198 INFO L226 Difference]: Without dead ends: 60214 [2020-12-22 07:40:00,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60214 states. [2020-12-22 07:40:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60214 to 30114. [2020-12-22 07:40:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30114 states. [2020-12-22 07:40:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30114 states to 30114 states and 47589 transitions. [2020-12-22 07:40:01,727 INFO L78 Accepts]: Start accepts. Automaton has 30114 states and 47589 transitions. Word has length 78 [2020-12-22 07:40:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:01,728 INFO L481 AbstractCegarLoop]: Abstraction has 30114 states and 47589 transitions. [2020-12-22 07:40:01,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30114 states and 47589 transitions. [2020-12-22 07:40:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:40:01,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:01,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:01,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:40:01,733 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash -57061967, now seen corresponding path program 1 times [2020-12-22 07:40:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:01,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984277981] [2020-12-22 07:40:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:01,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984277981] [2020-12-22 07:40:01,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:01,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:01,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607126936] [2020-12-22 07:40:01,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:01,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:01,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:01,997 INFO L87 Difference]: Start difference. First operand 30114 states and 47589 transitions. Second operand 4 states. [2020-12-22 07:40:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:04,173 INFO L93 Difference]: Finished difference Result 88984 states and 140445 transitions. [2020-12-22 07:40:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:04,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:40:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:04,316 INFO L225 Difference]: With dead ends: 88984 [2020-12-22 07:40:04,316 INFO L226 Difference]: Without dead ends: 58900 [2020-12-22 07:40:04,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58900 states. [2020-12-22 07:40:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58900 to 58898. [2020-12-22 07:40:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58898 states. [2020-12-22 07:40:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58898 states to 58898 states and 92344 transitions. [2020-12-22 07:40:06,724 INFO L78 Accepts]: Start accepts. Automaton has 58898 states and 92344 transitions. Word has length 79 [2020-12-22 07:40:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:06,725 INFO L481 AbstractCegarLoop]: Abstraction has 58898 states and 92344 transitions. [2020-12-22 07:40:06,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 58898 states and 92344 transitions. [2020-12-22 07:40:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:06,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:06,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:06,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:40:06,726 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:06,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1163177193, now seen corresponding path program 1 times [2020-12-22 07:40:06,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:06,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145343221] [2020-12-22 07:40:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:06,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145343221] [2020-12-22 07:40:06,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:06,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:06,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234656679] [2020-12-22 07:40:06,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:06,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:06,778 INFO L87 Difference]: Start difference. First operand 58898 states and 92344 transitions. Second operand 3 states. [2020-12-22 07:40:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:09,782 INFO L93 Difference]: Finished difference Result 142466 states and 224208 transitions. [2020-12-22 07:40:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:09,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:09,920 INFO L225 Difference]: With dead ends: 142466 [2020-12-22 07:40:09,920 INFO L226 Difference]: Without dead ends: 83848 [2020-12-22 07:40:09,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83848 states. [2020-12-22 07:40:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83848 to 81542. [2020-12-22 07:40:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81542 states. [2020-12-22 07:40:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81542 states to 81542 states and 127246 transitions. [2020-12-22 07:40:13,132 INFO L78 Accepts]: Start accepts. Automaton has 81542 states and 127246 transitions. Word has length 80 [2020-12-22 07:40:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:13,132 INFO L481 AbstractCegarLoop]: Abstraction has 81542 states and 127246 transitions. [2020-12-22 07:40:13,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81542 states and 127246 transitions. [2020-12-22 07:40:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:40:13,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:13,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:13,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:40:13,134 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -544448643, now seen corresponding path program 1 times [2020-12-22 07:40:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:13,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805465813] [2020-12-22 07:40:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:13,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805465813] [2020-12-22 07:40:13,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:13,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:13,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920394442] [2020-12-22 07:40:13,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:13,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:13,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:13,170 INFO L87 Difference]: Start difference. First operand 81542 states and 127246 transitions. Second operand 3 states. [2020-12-22 07:40:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:18,051 INFO L93 Difference]: Finished difference Result 244550 states and 381618 transitions. [2020-12-22 07:40:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:18,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:40:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:18,335 INFO L225 Difference]: With dead ends: 244550 [2020-12-22 07:40:18,335 INFO L226 Difference]: Without dead ends: 163052 [2020-12-22 07:40:18,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163052 states. [2020-12-22 07:40:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163052 to 81546. [2020-12-22 07:40:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81546 states. [2020-12-22 07:40:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81546 states to 81546 states and 127250 transitions. [2020-12-22 07:40:22,126 INFO L78 Accepts]: Start accepts. Automaton has 81546 states and 127250 transitions. Word has length 80 [2020-12-22 07:40:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:22,126 INFO L481 AbstractCegarLoop]: Abstraction has 81546 states and 127250 transitions. [2020-12-22 07:40:22,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 81546 states and 127250 transitions. [2020-12-22 07:40:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:40:22,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:22,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:22,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:40:22,129 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2051256477, now seen corresponding path program 1 times [2020-12-22 07:40:22,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:22,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482875369] [2020-12-22 07:40:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482875369] [2020-12-22 07:40:22,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:22,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:40:22,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964130770] [2020-12-22 07:40:22,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:40:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:40:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:40:22,239 INFO L87 Difference]: Start difference. First operand 81546 states and 127250 transitions. Second operand 4 states. [2020-12-22 07:40:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:27,884 INFO L93 Difference]: Finished difference Result 240890 states and 375346 transitions. [2020-12-22 07:40:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:40:27,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:40:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:28,187 INFO L225 Difference]: With dead ends: 240890 [2020-12-22 07:40:28,188 INFO L226 Difference]: Without dead ends: 159392 [2020-12-22 07:40:28,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:40:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159392 states. [2020-12-22 07:40:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159392 to 159390. [2020-12-22 07:40:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159390 states. [2020-12-22 07:40:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159390 states to 159390 states and 246600 transitions. [2020-12-22 07:40:34,580 INFO L78 Accepts]: Start accepts. Automaton has 159390 states and 246600 transitions. Word has length 81 [2020-12-22 07:40:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:34,580 INFO L481 AbstractCegarLoop]: Abstraction has 159390 states and 246600 transitions. [2020-12-22 07:40:34,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:40:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 159390 states and 246600 transitions. [2020-12-22 07:40:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:34,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:34,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:34,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:40:34,583 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:34,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2106822348, now seen corresponding path program 1 times [2020-12-22 07:40:34,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:34,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665663344] [2020-12-22 07:40:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:34,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665663344] [2020-12-22 07:40:34,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:34,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:34,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321760583] [2020-12-22 07:40:34,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:34,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:34,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:34,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:34,636 INFO L87 Difference]: Start difference. First operand 159390 states and 246600 transitions. Second operand 3 states. [2020-12-22 07:40:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:40:42,480 INFO L93 Difference]: Finished difference Result 386314 states and 600650 transitions. [2020-12-22 07:40:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:40:42,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:40:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:40:43,149 INFO L225 Difference]: With dead ends: 386314 [2020-12-22 07:40:43,149 INFO L226 Difference]: Without dead ends: 227488 [2020-12-22 07:40:43,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227488 states. [2020-12-22 07:40:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227488 to 220286. [2020-12-22 07:40:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220286 states. [2020-12-22 07:40:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220286 states to 220286 states and 338608 transitions. [2020-12-22 07:40:52,275 INFO L78 Accepts]: Start accepts. Automaton has 220286 states and 338608 transitions. Word has length 82 [2020-12-22 07:40:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:40:52,275 INFO L481 AbstractCegarLoop]: Abstraction has 220286 states and 338608 transitions. [2020-12-22 07:40:52,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:40:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 220286 states and 338608 transitions. [2020-12-22 07:40:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:40:52,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:40:52,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:40:52,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:40:52,277 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:40:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:40:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash -565045271, now seen corresponding path program 1 times [2020-12-22 07:40:52,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:40:52,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604205724] [2020-12-22 07:40:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:40:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:40:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:40:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604205724] [2020-12-22 07:40:52,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:40:52,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:40:52,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97050220] [2020-12-22 07:40:52,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:40:52,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:40:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:40:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:40:52,321 INFO L87 Difference]: Start difference. First operand 220286 states and 338608 transitions. Second operand 3 states. [2020-12-22 07:41:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:07,352 INFO L93 Difference]: Finished difference Result 660434 states and 1015278 transitions. [2020-12-22 07:41:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:07,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:08,357 INFO L225 Difference]: With dead ends: 660434 [2020-12-22 07:41:08,358 INFO L226 Difference]: Without dead ends: 440480 [2020-12-22 07:41:08,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440480 states. [2020-12-22 07:41:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440480 to 220294. [2020-12-22 07:41:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220294 states. [2020-12-22 07:41:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220294 states to 220294 states and 338616 transitions. [2020-12-22 07:41:20,875 INFO L78 Accepts]: Start accepts. Automaton has 220294 states and 338616 transitions. Word has length 82 [2020-12-22 07:41:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:20,876 INFO L481 AbstractCegarLoop]: Abstraction has 220294 states and 338616 transitions. [2020-12-22 07:41:20,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 220294 states and 338616 transitions. [2020-12-22 07:41:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:20,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:20,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:20,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:41:20,878 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1283476260, now seen corresponding path program 1 times [2020-12-22 07:41:20,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:20,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469435139] [2020-12-22 07:41:20,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:21,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469435139] [2020-12-22 07:41:21,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:21,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613667734] [2020-12-22 07:41:21,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:21,409 INFO L87 Difference]: Start difference. First operand 220294 states and 338616 transitions. Second operand 5 states. [2020-12-22 07:41:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:38,225 INFO L93 Difference]: Finished difference Result 622528 states and 956257 transitions. [2020-12-22 07:41:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:38,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:41:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:39,123 INFO L225 Difference]: With dead ends: 622528 [2020-12-22 07:41:39,124 INFO L226 Difference]: Without dead ends: 402322 [2020-12-22 07:41:39,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:39,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402322 states. [2020-12-22 07:41:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402322 to 402320. [2020-12-22 07:41:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402320 states. [2020-12-22 07:41:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402320 states to 402320 states and 612785 transitions. [2020-12-22 07:41:59,207 INFO L78 Accepts]: Start accepts. Automaton has 402320 states and 612785 transitions. Word has length 83 [2020-12-22 07:41:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:59,208 INFO L481 AbstractCegarLoop]: Abstraction has 402320 states and 612785 transitions. [2020-12-22 07:41:59,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 402320 states and 612785 transitions. [2020-12-22 07:41:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:41:59,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:59,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:41:59,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:41:59,228 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2141300343, now seen corresponding path program 1 times [2020-12-22 07:41:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:59,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609288445] [2020-12-22 07:41:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:59,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609288445] [2020-12-22 07:41:59,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:59,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826213349] [2020-12-22 07:41:59,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:59,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:59,365 INFO L87 Difference]: Start difference. First operand 402320 states and 612785 transitions. Second operand 4 states. [2020-12-22 07:42:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:13,883 INFO L93 Difference]: Finished difference Result 715506 states and 1087835 transitions. [2020-12-22 07:42:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:13,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:42:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:14,556 INFO L225 Difference]: With dead ends: 715506 [2020-12-22 07:42:14,556 INFO L226 Difference]: Without dead ends: 313260 [2020-12-22 07:42:14,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313260 states. [2020-12-22 07:42:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313260 to 313260. [2020-12-22 07:42:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313260 states. [2020-12-22 07:42:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313260 states to 313260 states and 475153 transitions. [2020-12-22 07:42:29,841 INFO L78 Accepts]: Start accepts. Automaton has 313260 states and 475153 transitions. Word has length 83 [2020-12-22 07:42:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:29,842 INFO L481 AbstractCegarLoop]: Abstraction has 313260 states and 475153 transitions. [2020-12-22 07:42:29,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:42:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 313260 states and 475153 transitions. [2020-12-22 07:42:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:42:29,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:29,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:42:29,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:42:29,844 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1610663161, now seen corresponding path program 1 times [2020-12-22 07:42:29,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:29,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516922884] [2020-12-22 07:42:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:42:29,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516922884] [2020-12-22 07:42:29,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:29,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:42:29,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629897297] [2020-12-22 07:42:29,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:42:29,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:29,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:42:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:42:29,980 INFO L87 Difference]: Start difference. First operand 313260 states and 475153 transitions. Second operand 4 states. [2020-12-22 07:42:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:54,515 INFO L93 Difference]: Finished difference Result 823108 states and 1247342 transitions. [2020-12-22 07:42:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:54,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:42:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:55,941 INFO L225 Difference]: With dead ends: 823108 [2020-12-22 07:42:55,941 INFO L226 Difference]: Without dead ends: 509980 [2020-12-22 07:42:56,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509980 states.