/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_floodmax.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:22:40,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:22:40,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:22:40,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:22:40,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:22:40,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:22:40,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:22:40,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:22:40,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:22:40,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:22:40,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:22:40,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:22:40,814 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:22:40,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:22:40,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:22:40,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:22:40,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:22:40,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:22:40,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:22:40,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:22:40,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:22:40,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:22:40,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:22:40,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:22:40,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:22:40,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:22:40,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:22:40,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:22:40,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:22:40,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:22:40,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:22:40,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:22:40,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:22:40,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:22:41,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:22:41,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:22:41,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:22:41,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:22:41,312 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:22:41,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:41,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be64ac310/a2d713741dc5400d95576dadd49a9b6f/FLAGa53d439ea [2020-12-22 07:22:42,241 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:22:42,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:42,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be64ac310/a2d713741dc5400d95576dadd49a9b6f/FLAGa53d439ea [2020-12-22 07:22:42,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be64ac310/a2d713741dc5400d95576dadd49a9b6f [2020-12-22 07:22:42,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:22:42,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:22:42,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:42,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:22:42,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:22:42,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:42" (1/1) ... [2020-12-22 07:22:42,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a089f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:42, skipping insertion in model container [2020-12-22 07:22:42,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:42" (1/1) ... [2020-12-22 07:22:42,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:22:42,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:22:42,985 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_floodmax.4.ufo.BOUNDED-8.pals.c[28192,28205] [2020-12-22 07:22:42,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:43,010 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:22:43,153 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_floodmax.4.ufo.BOUNDED-8.pals.c[28192,28205] [2020-12-22 07:22:43,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:43,188 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:22:43,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43 WrapperNode [2020-12-22 07:22:43,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:43,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:43,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:22:43,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:22:43,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:43,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:22:43,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:22:43,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:22:43,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... [2020-12-22 07:22:43,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:22:43,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:22:43,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:22:43,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:22:43,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:22:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:22:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:22:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:22:43,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:22:45,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:22:45,252 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:22:45,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:45 BoogieIcfgContainer [2020-12-22 07:22:45,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:22:45,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:22:45,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:22:45,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:22:45,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:22:42" (1/3) ... [2020-12-22 07:22:45,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3785226d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:45, skipping insertion in model container [2020-12-22 07:22:45,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:43" (2/3) ... [2020-12-22 07:22:45,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3785226d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:45, skipping insertion in model container [2020-12-22 07:22:45,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:45" (3/3) ... [2020-12-22 07:22:45,264 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:22:45,271 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:22:45,277 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:22:45,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:22:45,327 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:22:45,328 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:22:45,328 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:22:45,328 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:22:45,328 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:22:45,328 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:22:45,328 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:22:45,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:22:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states. [2020-12-22 07:22:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:45,367 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 07:22:45,367 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2110216456, now seen corresponding path program 1 times [2020-12-22 07:22:45,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:45,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086247673] [2020-12-22 07:22:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:45,874 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 07:22:45,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086247673] [2020-12-22 07:22:45,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:45,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:22:45,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718839677] [2020-12-22 07:22:45,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:22:45,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:22:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:22:45,900 INFO L87 Difference]: Start difference. First operand 304 states. Second operand 2 states. [2020-12-22 07:22:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:45,946 INFO L93 Difference]: Finished difference Result 417 states and 738 transitions. [2020-12-22 07:22:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:22:45,948 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:22:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:45,967 INFO L225 Difference]: With dead ends: 417 [2020-12-22 07:22:45,967 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:22:45,971 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 07:22:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:22:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:22:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:22:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 539 transitions. [2020-12-22 07:22:46,063 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 539 transitions. Word has length 77 [2020-12-22 07:22:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:46,064 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 539 transitions. [2020-12-22 07:22:46,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:22:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 539 transitions. [2020-12-22 07:22:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:46,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:46,077 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 07:22:46,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:22:46,078 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2050737334, now seen corresponding path program 1 times [2020-12-22 07:22:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:46,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888086767] [2020-12-22 07:22:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:46,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888086767] [2020-12-22 07:22:46,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:46,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:22:46,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245599393] [2020-12-22 07:22:46,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:22:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:46,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:22:46,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:46,328 INFO L87 Difference]: Start difference. First operand 300 states and 539 transitions. Second operand 5 states. [2020-12-22 07:22:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:46,466 INFO L93 Difference]: Finished difference Result 412 states and 728 transitions. [2020-12-22 07:22:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:22:46,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:22:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:46,470 INFO L225 Difference]: With dead ends: 412 [2020-12-22 07:22:46,470 INFO L226 Difference]: Without dead ends: 300 [2020-12-22 07:22:46,472 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 07:22:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-22 07:22:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2020-12-22 07:22:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-12-22 07:22:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 497 transitions. [2020-12-22 07:22:46,500 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 497 transitions. Word has length 77 [2020-12-22 07:22:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:46,500 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 497 transitions. [2020-12-22 07:22:46,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:22:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 497 transitions. [2020-12-22 07:22:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:22:46,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:46,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:46,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:22:46,510 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:46,511 INFO L82 PathProgramCache]: Analyzing trace with hash 255571390, now seen corresponding path program 1 times [2020-12-22 07:22:46,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:46,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290455075] [2020-12-22 07:22:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:46,716 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 07:22:46,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290455075] [2020-12-22 07:22:46,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:46,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548273132] [2020-12-22 07:22:46,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:46,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:46,720 INFO L87 Difference]: Start difference. First operand 300 states and 497 transitions. Second operand 3 states. [2020-12-22 07:22:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:46,769 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2020-12-22 07:22:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:46,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:22:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:46,773 INFO L225 Difference]: With dead ends: 505 [2020-12-22 07:22:46,774 INFO L226 Difference]: Without dead ends: 397 [2020-12-22 07:22:46,775 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 07:22:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-22 07:22:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2020-12-22 07:22:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-22 07:22:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 655 transitions. [2020-12-22 07:22:46,796 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 655 transitions. Word has length 118 [2020-12-22 07:22:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:46,797 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 655 transitions. [2020-12-22 07:22:46,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 655 transitions. [2020-12-22 07:22:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:22:46,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:46,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:46,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:22:46,800 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1923540700, now seen corresponding path program 1 times [2020-12-22 07:22:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:46,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968210523] [2020-12-22 07:22:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:46,947 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 07:22:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968210523] [2020-12-22 07:22:46,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:46,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546090872] [2020-12-22 07:22:46,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:46,953 INFO L87 Difference]: Start difference. First operand 395 states and 655 transitions. Second operand 3 states. [2020-12-22 07:22:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:46,989 INFO L93 Difference]: Finished difference Result 593 states and 993 transitions. [2020-12-22 07:22:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:46,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:22:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:46,997 INFO L225 Difference]: With dead ends: 593 [2020-12-22 07:22:46,997 INFO L226 Difference]: Without dead ends: 485 [2020-12-22 07:22:46,999 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 07:22:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-12-22 07:22:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 483. [2020-12-22 07:22:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-12-22 07:22:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 805 transitions. [2020-12-22 07:22:47,031 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 805 transitions. Word has length 121 [2020-12-22 07:22:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 805 transitions. [2020-12-22 07:22:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 805 transitions. [2020-12-22 07:22:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:22:47,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:47,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:47,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:22:47,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1109580608, now seen corresponding path program 1 times [2020-12-22 07:22:47,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:47,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82005762] [2020-12-22 07:22:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:47,249 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 07:22:47,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82005762] [2020-12-22 07:22:47,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:47,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407174605] [2020-12-22 07:22:47,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:47,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:47,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:47,253 INFO L87 Difference]: Start difference. First operand 483 states and 805 transitions. Second operand 3 states. [2020-12-22 07:22:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:47,303 INFO L93 Difference]: Finished difference Result 1034 states and 1736 transitions. [2020-12-22 07:22:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:47,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:22:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:47,311 INFO L225 Difference]: With dead ends: 1034 [2020-12-22 07:22:47,311 INFO L226 Difference]: Without dead ends: 745 [2020-12-22 07:22:47,314 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 07:22:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-12-22 07:22:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2020-12-22 07:22:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-12-22 07:22:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1241 transitions. [2020-12-22 07:22:47,345 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1241 transitions. Word has length 121 [2020-12-22 07:22:47,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:47,345 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1241 transitions. [2020-12-22 07:22:47,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1241 transitions. [2020-12-22 07:22:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:22:47,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:47,351 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:47,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:22:47,351 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2073181113, now seen corresponding path program 1 times [2020-12-22 07:22:47,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:47,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909625174] [2020-12-22 07:22:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:47,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909625174] [2020-12-22 07:22:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:47,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514385598] [2020-12-22 07:22:47,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:47,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:47,473 INFO L87 Difference]: Start difference. First operand 743 states and 1241 transitions. Second operand 3 states. [2020-12-22 07:22:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:47,531 INFO L93 Difference]: Finished difference Result 1274 states and 2138 transitions. [2020-12-22 07:22:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:47,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:22:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:47,539 INFO L225 Difference]: With dead ends: 1274 [2020-12-22 07:22:47,540 INFO L226 Difference]: Without dead ends: 985 [2020-12-22 07:22:47,541 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 07:22:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-12-22 07:22:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 983. [2020-12-22 07:22:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 983 states. [2020-12-22 07:22:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1642 transitions. [2020-12-22 07:22:47,581 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1642 transitions. Word has length 124 [2020-12-22 07:22:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:47,582 INFO L481 AbstractCegarLoop]: Abstraction has 983 states and 1642 transitions. [2020-12-22 07:22:47,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1642 transitions. [2020-12-22 07:22:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:22:47,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:47,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:47,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:22:47,584 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1914082347, now seen corresponding path program 1 times [2020-12-22 07:22:47,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:47,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391348522] [2020-12-22 07:22:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:47,706 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 07:22:47,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391348522] [2020-12-22 07:22:47,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:47,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:47,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585899293] [2020-12-22 07:22:47,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:47,709 INFO L87 Difference]: Start difference. First operand 983 states and 1642 transitions. Second operand 3 states. [2020-12-22 07:22:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:47,772 INFO L93 Difference]: Finished difference Result 2454 states and 4107 transitions. [2020-12-22 07:22:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:47,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:22:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:47,783 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:22:47,783 INFO L226 Difference]: Without dead ends: 1678 [2020-12-22 07:22:47,786 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 07:22:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2020-12-22 07:22:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1676. [2020-12-22 07:22:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2020-12-22 07:22:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2788 transitions. [2020-12-22 07:22:47,854 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2788 transitions. Word has length 124 [2020-12-22 07:22:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:47,855 INFO L481 AbstractCegarLoop]: Abstraction has 1676 states and 2788 transitions. [2020-12-22 07:22:47,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2788 transitions. [2020-12-22 07:22:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:22:47,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:47,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:47,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:22:47,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1459354075, now seen corresponding path program 1 times [2020-12-22 07:22:47,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:47,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608545055] [2020-12-22 07:22:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:48,012 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 07:22:48,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608545055] [2020-12-22 07:22:48,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:48,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:48,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593426144] [2020-12-22 07:22:48,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:48,016 INFO L87 Difference]: Start difference. First operand 1676 states and 2788 transitions. Second operand 3 states. [2020-12-22 07:22:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:48,093 INFO L93 Difference]: Finished difference Result 3061 states and 5111 transitions. [2020-12-22 07:22:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:48,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:22:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:48,112 INFO L225 Difference]: With dead ends: 3061 [2020-12-22 07:22:48,112 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 07:22:48,115 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 07:22:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 07:22:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 07:22:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 07:22:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3791 transitions. [2020-12-22 07:22:48,235 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3791 transitions. Word has length 127 [2020-12-22 07:22:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:48,236 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3791 transitions. [2020-12-22 07:22:48,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3791 transitions. [2020-12-22 07:22:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:22:48,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:48,238 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:48,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:22:48,239 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1832413193, now seen corresponding path program 1 times [2020-12-22 07:22:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:48,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867376587] [2020-12-22 07:22:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:48,431 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 07:22:48,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867376587] [2020-12-22 07:22:48,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:48,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669349704] [2020-12-22 07:22:48,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:48,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:48,440 INFO L87 Difference]: Start difference. First operand 2283 states and 3791 transitions. Second operand 3 states. [2020-12-22 07:22:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:48,557 INFO L93 Difference]: Finished difference Result 6166 states and 10210 transitions. [2020-12-22 07:22:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:48,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:22:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:48,585 INFO L225 Difference]: With dead ends: 6166 [2020-12-22 07:22:48,585 INFO L226 Difference]: Without dead ends: 4103 [2020-12-22 07:22:48,593 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 07:22:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2020-12-22 07:22:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 4101. [2020-12-22 07:22:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4101 states. [2020-12-22 07:22:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6743 transitions. [2020-12-22 07:22:48,768 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6743 transitions. Word has length 127 [2020-12-22 07:22:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:48,769 INFO L481 AbstractCegarLoop]: Abstraction has 4101 states and 6743 transitions. [2020-12-22 07:22:48,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6743 transitions. [2020-12-22 07:22:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:22:48,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:48,771 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:48,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:22:48,772 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1181394736, now seen corresponding path program 1 times [2020-12-22 07:22:48,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:48,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573469170] [2020-12-22 07:22:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:48,895 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 07:22:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573469170] [2020-12-22 07:22:48,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:48,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:48,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228753571] [2020-12-22 07:22:48,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:48,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:48,901 INFO L87 Difference]: Start difference. First operand 4101 states and 6743 transitions. Second operand 3 states. [2020-12-22 07:22:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:49,036 INFO L93 Difference]: Finished difference Result 7700 states and 12696 transitions. [2020-12-22 07:22:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:49,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 07:22:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:49,070 INFO L225 Difference]: With dead ends: 7700 [2020-12-22 07:22:49,071 INFO L226 Difference]: Without dead ends: 5637 [2020-12-22 07:22:49,077 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 07:22:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5637 states. [2020-12-22 07:22:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5637 to 5635. [2020-12-22 07:22:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5635 states. [2020-12-22 07:22:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 9228 transitions. [2020-12-22 07:22:49,312 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 9228 transitions. Word has length 130 [2020-12-22 07:22:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:49,312 INFO L481 AbstractCegarLoop]: Abstraction has 5635 states and 9228 transitions. [2020-12-22 07:22:49,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 9228 transitions. [2020-12-22 07:22:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:22:49,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:49,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:49,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:22:49,315 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -163814164, now seen corresponding path program 1 times [2020-12-22 07:22:49,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:49,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040748721] [2020-12-22 07:22:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:49,485 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 07:22:49,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040748721] [2020-12-22 07:22:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:49,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880112041] [2020-12-22 07:22:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:49,490 INFO L87 Difference]: Start difference. First operand 5635 states and 9228 transitions. Second operand 6 states. [2020-12-22 07:22:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:50,585 INFO L93 Difference]: Finished difference Result 34219 states and 56471 transitions. [2020-12-22 07:22:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:22:50,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:22:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:50,714 INFO L225 Difference]: With dead ends: 34219 [2020-12-22 07:22:50,714 INFO L226 Difference]: Without dead ends: 28817 [2020-12-22 07:22:50,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:22:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28817 states. [2020-12-22 07:22:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28817 to 10967. [2020-12-22 07:22:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10967 states. [2020-12-22 07:22:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 17845 transitions. [2020-12-22 07:22:51,542 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 17845 transitions. Word has length 130 [2020-12-22 07:22:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:51,543 INFO L481 AbstractCegarLoop]: Abstraction has 10967 states and 17845 transitions. [2020-12-22 07:22:51,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 17845 transitions. [2020-12-22 07:22:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:22:51,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:51,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:51,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:22:51,546 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1417088843, now seen corresponding path program 1 times [2020-12-22 07:22:51,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:51,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571722745] [2020-12-22 07:22:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:51,768 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 07:22:51,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571722745] [2020-12-22 07:22:51,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:51,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:51,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919268048] [2020-12-22 07:22:51,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:51,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:51,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:51,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:51,771 INFO L87 Difference]: Start difference. First operand 10967 states and 17845 transitions. Second operand 4 states. [2020-12-22 07:22:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:52,552 INFO L93 Difference]: Finished difference Result 32421 states and 53133 transitions. [2020-12-22 07:22:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:52,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:22:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:52,615 INFO L225 Difference]: With dead ends: 32421 [2020-12-22 07:22:52,615 INFO L226 Difference]: Without dead ends: 21687 [2020-12-22 07:22:52,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2020-12-22 07:22:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 18012. [2020-12-22 07:22:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18012 states. [2020-12-22 07:22:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18012 states to 18012 states and 29344 transitions. [2020-12-22 07:22:53,559 INFO L78 Accepts]: Start accepts. Automaton has 18012 states and 29344 transitions. Word has length 131 [2020-12-22 07:22:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:53,559 INFO L481 AbstractCegarLoop]: Abstraction has 18012 states and 29344 transitions. [2020-12-22 07:22:53,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 18012 states and 29344 transitions. [2020-12-22 07:22:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:22:53,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:53,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:53,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:22:53,563 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -945521149, now seen corresponding path program 1 times [2020-12-22 07:22:53,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:53,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366572353] [2020-12-22 07:22:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:53,820 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 07:22:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366572353] [2020-12-22 07:22:53,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:53,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476324056] [2020-12-22 07:22:53,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:53,823 INFO L87 Difference]: Start difference. First operand 18012 states and 29344 transitions. Second operand 4 states. [2020-12-22 07:22:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:55,014 INFO L93 Difference]: Finished difference Result 52879 states and 86403 transitions. [2020-12-22 07:22:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:55,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:22:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:55,127 INFO L225 Difference]: With dead ends: 52879 [2020-12-22 07:22:55,128 INFO L226 Difference]: Without dead ends: 35100 [2020-12-22 07:22:55,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:55,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35100 states. [2020-12-22 07:22:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35100 to 29449. [2020-12-22 07:22:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29449 states. [2020-12-22 07:22:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29449 states to 29449 states and 47793 transitions. [2020-12-22 07:22:56,510 INFO L78 Accepts]: Start accepts. Automaton has 29449 states and 47793 transitions. Word has length 132 [2020-12-22 07:22:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:56,511 INFO L481 AbstractCegarLoop]: Abstraction has 29449 states and 47793 transitions. [2020-12-22 07:22:56,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 29449 states and 47793 transitions. [2020-12-22 07:22:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:56,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:56,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:56,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:22:56,514 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1002982526, now seen corresponding path program 1 times [2020-12-22 07:22:56,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:56,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260706252] [2020-12-22 07:22:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:56,634 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 07:22:56,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260706252] [2020-12-22 07:22:56,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:56,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:56,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617325279] [2020-12-22 07:22:56,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:56,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:56,637 INFO L87 Difference]: Start difference. First operand 29449 states and 47793 transitions. Second operand 4 states. [2020-12-22 07:22:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:58,633 INFO L93 Difference]: Finished difference Result 85951 states and 139911 transitions. [2020-12-22 07:22:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:58,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:22:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:58,841 INFO L225 Difference]: With dead ends: 85951 [2020-12-22 07:22:58,842 INFO L226 Difference]: Without dead ends: 56735 [2020-12-22 07:22:58,903 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 07:22:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56735 states. [2020-12-22 07:23:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56735 to 47894. [2020-12-22 07:23:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47894 states. [2020-12-22 07:23:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47894 states to 47894 states and 77430 transitions. [2020-12-22 07:23:01,159 INFO L78 Accepts]: Start accepts. Automaton has 47894 states and 77430 transitions. Word has length 133 [2020-12-22 07:23:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:01,160 INFO L481 AbstractCegarLoop]: Abstraction has 47894 states and 77430 transitions. [2020-12-22 07:23:01,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 47894 states and 77430 transitions. [2020-12-22 07:23:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:23:01,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:01,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:01,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:23:01,170 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1679686426, now seen corresponding path program 1 times [2020-12-22 07:23:01,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:01,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17878115] [2020-12-22 07:23:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:01,300 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 07:23:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17878115] [2020-12-22 07:23:01,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:01,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538590188] [2020-12-22 07:23:01,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:01,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:01,303 INFO L87 Difference]: Start difference. First operand 47894 states and 77430 transitions. Second operand 4 states. [2020-12-22 07:23:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:03,437 INFO L93 Difference]: Finished difference Result 137703 states and 223323 transitions. [2020-12-22 07:23:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:03,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:23:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:03,728 INFO L225 Difference]: With dead ends: 137703 [2020-12-22 07:23:03,728 INFO L226 Difference]: Without dead ends: 90042 [2020-12-22 07:23:03,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90042 states. [2020-12-22 07:23:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90042 to 76943. [2020-12-22 07:23:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:23:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123931 transitions. [2020-12-22 07:23:06,692 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123931 transitions. Word has length 134 [2020-12-22 07:23:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:06,693 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123931 transitions. [2020-12-22 07:23:06,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123931 transitions. [2020-12-22 07:23:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:23:06,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:06,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:06,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:23:06,697 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1349768178, now seen corresponding path program 1 times [2020-12-22 07:23:06,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:06,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590647031] [2020-12-22 07:23:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:07,104 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 07:23:07,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590647031] [2020-12-22 07:23:07,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:07,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:07,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588473515] [2020-12-22 07:23:07,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:07,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:07,109 INFO L87 Difference]: Start difference. First operand 76943 states and 123931 transitions. Second operand 6 states. [2020-12-22 07:23:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:09,951 INFO L93 Difference]: Finished difference Result 185517 states and 299643 transitions. [2020-12-22 07:23:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:23:09,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:23:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:10,175 INFO L225 Difference]: With dead ends: 185517 [2020-12-22 07:23:10,176 INFO L226 Difference]: Without dead ends: 108807 [2020-12-22 07:23:10,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:23:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108807 states. [2020-12-22 07:23:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108807 to 76943. [2020-12-22 07:23:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76943 states. [2020-12-22 07:23:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76943 states to 76943 states and 123306 transitions. [2020-12-22 07:23:13,057 INFO L78 Accepts]: Start accepts. Automaton has 76943 states and 123306 transitions. Word has length 136 [2020-12-22 07:23:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:13,057 INFO L481 AbstractCegarLoop]: Abstraction has 76943 states and 123306 transitions. [2020-12-22 07:23:13,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:23:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 76943 states and 123306 transitions. [2020-12-22 07:23:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:23:13,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:13,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:13,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:23:13,060 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash 412618117, now seen corresponding path program 1 times [2020-12-22 07:23:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:13,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644872673] [2020-12-22 07:23:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:13,565 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 07:23:13,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644872673] [2020-12-22 07:23:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110753906] [2020-12-22 07:23:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:13,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:13,568 INFO L87 Difference]: Start difference. First operand 76943 states and 123306 transitions. Second operand 4 states. [2020-12-22 07:23:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:17,505 INFO L93 Difference]: Finished difference Result 228942 states and 366846 transitions. [2020-12-22 07:23:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:17,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:23:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:17,792 INFO L225 Difference]: With dead ends: 228942 [2020-12-22 07:23:17,792 INFO L226 Difference]: Without dead ends: 152010 [2020-12-22 07:23:17,856 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 07:23:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152010 states. [2020-12-22 07:23:22,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152010 to 152008. [2020-12-22 07:23:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152008 states. [2020-12-22 07:23:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152008 states to 152008 states and 242382 transitions. [2020-12-22 07:23:23,064 INFO L78 Accepts]: Start accepts. Automaton has 152008 states and 242382 transitions. Word has length 139 [2020-12-22 07:23:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:23,064 INFO L481 AbstractCegarLoop]: Abstraction has 152008 states and 242382 transitions. [2020-12-22 07:23:23,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 152008 states and 242382 transitions. [2020-12-22 07:23:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:23:23,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:23,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:23,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:23:23,084 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1038580458, now seen corresponding path program 1 times [2020-12-22 07:23:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478998249] [2020-12-22 07:23:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:23,306 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 07:23:23,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478998249] [2020-12-22 07:23:23,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:23,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:23,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391018659] [2020-12-22 07:23:23,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:23,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:23,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:23,309 INFO L87 Difference]: Start difference. First operand 152008 states and 242382 transitions. Second operand 4 states. [2020-12-22 07:23:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:31,384 INFO L93 Difference]: Finished difference Result 452262 states and 721025 transitions. [2020-12-22 07:23:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:31,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:23:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:32,237 INFO L225 Difference]: With dead ends: 452262 [2020-12-22 07:23:32,238 INFO L226 Difference]: Without dead ends: 300266 [2020-12-22 07:23:32,378 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 07:23:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300266 states. [2020-12-22 07:23:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300266 to 300264. [2020-12-22 07:23:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300264 states. [2020-12-22 07:23:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300264 states to 300264 states and 476310 transitions. [2020-12-22 07:23:42,903 INFO L78 Accepts]: Start accepts. Automaton has 300264 states and 476310 transitions. Word has length 141 [2020-12-22 07:23:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:42,921 INFO L481 AbstractCegarLoop]: Abstraction has 300264 states and 476310 transitions. [2020-12-22 07:23:42,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 300264 states and 476310 transitions. [2020-12-22 07:23:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:23:42,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:42,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:42,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:23:42,925 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1947387771, now seen corresponding path program 1 times [2020-12-22 07:23:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592602621] [2020-12-22 07:23:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:43,172 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 07:23:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592602621] [2020-12-22 07:23:43,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:43,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090086976] [2020-12-22 07:23:43,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:43,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:43,177 INFO L87 Difference]: Start difference. First operand 300264 states and 476310 transitions. Second operand 4 states. [2020-12-22 07:24:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:00,648 INFO L93 Difference]: Finished difference Result 893269 states and 1416691 transitions. [2020-12-22 07:24:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:00,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:24:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:01,986 INFO L225 Difference]: With dead ends: 893269 [2020-12-22 07:24:01,986 INFO L226 Difference]: Without dead ends: 593032 [2020-12-22 07:24:02,279 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 07:24:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593032 states. [2020-12-22 07:24:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593032 to 593030. [2020-12-22 07:24:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 593030 states. [2020-12-22 07:24:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593030 states to 593030 states and 935723 transitions. [2020-12-22 07:24:30,134 INFO L78 Accepts]: Start accepts. Automaton has 593030 states and 935723 transitions. Word has length 143 [2020-12-22 07:24:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:30,134 INFO L481 AbstractCegarLoop]: Abstraction has 593030 states and 935723 transitions. [2020-12-22 07:24:30,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 593030 states and 935723 transitions. [2020-12-22 07:24:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:24:30,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:30,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:30,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:24:30,141 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash 380264234, now seen corresponding path program 1 times [2020-12-22 07:24:30,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:30,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233561319] [2020-12-22 07:24:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:30,432 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 07:24:30,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233561319] [2020-12-22 07:24:30,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:30,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:30,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875984006] [2020-12-22 07:24:30,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:30,435 INFO L87 Difference]: Start difference. First operand 593030 states and 935723 transitions. Second operand 4 states. [2020-12-22 07:25:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:14,166 INFO L93 Difference]: Finished difference Result 1763882 states and 2782417 transitions. [2020-12-22 07:25:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:14,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:25:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:18,643 INFO L225 Difference]: With dead ends: 1763882 [2020-12-22 07:25:18,644 INFO L226 Difference]: Without dead ends: 1170988 [2020-12-22 07:25:19,402 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 07:25:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170988 states.