/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:03:43,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:03:43,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:03:43,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 09:03:43,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:03:43,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:03:43,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:03:43,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:03:43,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:03:43,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:03:43,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:03:43,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:03:43,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:03:43,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:03:43,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:03:43,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:03:43,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:03:43,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:03:43,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:03:43,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:03:43,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:03:43,780 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:03:43,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:03:43,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:03:43,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:03:43,785 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:03:43,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:03:43,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:03:43,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:03:43,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:03:43,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:03:43,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:03:43,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:03:43,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:03:43,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:03:43,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:03:43,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:03:43,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:03:43,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:03:43,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:03:43,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:03:43,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:03:43,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:03:43,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:03:43,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:03:43,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:03:43,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:03:44,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:03:44,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:03:44,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:03:44,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:03:44,219 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:03:44,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:03:44,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7f43236/d8a4edc2bf00422da46ff71a51578f36/FLAGf1a5eec59 [2020-12-22 09:03:44,978 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:03:44,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:03:45,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7f43236/d8a4edc2bf00422da46ff71a51578f36/FLAGf1a5eec59 [2020-12-22 09:03:45,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7f43236/d8a4edc2bf00422da46ff71a51578f36 [2020-12-22 09:03:45,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:03:45,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:03:45,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:45,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:03:45,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:03:45,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:45" (1/1) ... [2020-12-22 09:03:45,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c05bf50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:45, skipping insertion in model container [2020-12-22 09:03:45,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:45" (1/1) ... [2020-12-22 09:03:45,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:03:45,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:03:45,746 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15462,15475] [2020-12-22 09:03:45,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:45,997 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:03:46,163 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15462,15475] [2020-12-22 09:03:46,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:46,285 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:03:46,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46 WrapperNode [2020-12-22 09:03:46,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:46,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:46,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:03:46,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:03:46,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:46,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:03:46,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:03:46,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:03:46,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (1/1) ... [2020-12-22 09:03:46,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:03:46,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:03:46,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:03:46,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:03:46,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (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 09:03:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:03:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:03:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:03:46,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:03:48,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:03:48,575 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:03:48,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:48 BoogieIcfgContainer [2020-12-22 09:03:48,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:03:48,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:03:48,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:03:48,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:03:48,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:03:45" (1/3) ... [2020-12-22 09:03:48,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb30cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:48, skipping insertion in model container [2020-12-22 09:03:48,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:46" (2/3) ... [2020-12-22 09:03:48,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bb30cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:48, skipping insertion in model container [2020-12-22 09:03:48,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:48" (3/3) ... [2020-12-22 09:03:48,586 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:03:48,593 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:03:48,598 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:03:48,618 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:03:48,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:03:48,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:03:48,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:03:48,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:03:48,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:03:48,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:03:48,649 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:03:48,649 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:03:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states. [2020-12-22 09:03:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:03:48,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:48,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:48,692 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2020-12-22 09:03:48,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:48,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762686015] [2020-12-22 09:03:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:49,502 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 09:03:49,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762686015] [2020-12-22 09:03:49,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:49,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744495448] [2020-12-22 09:03:49,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:49,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:49,535 INFO L87 Difference]: Start difference. First operand 344 states. Second operand 3 states. [2020-12-22 09:03:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:49,833 INFO L93 Difference]: Finished difference Result 702 states and 1220 transitions. [2020-12-22 09:03:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:49,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:03:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:49,858 INFO L225 Difference]: With dead ends: 702 [2020-12-22 09:03:49,858 INFO L226 Difference]: Without dead ends: 565 [2020-12-22 09:03:49,864 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 09:03:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2020-12-22 09:03:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2020-12-22 09:03:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-12-22 09:03:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 842 transitions. [2020-12-22 09:03:49,959 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 842 transitions. Word has length 155 [2020-12-22 09:03:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:49,960 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 842 transitions. [2020-12-22 09:03:49,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 842 transitions. [2020-12-22 09:03:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:03:49,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:49,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:49,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:03:49,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash -599043347, now seen corresponding path program 1 times [2020-12-22 09:03:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:49,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968367788] [2020-12-22 09:03:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:50,336 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 09:03:50,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968367788] [2020-12-22 09:03:50,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:50,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:50,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234636829] [2020-12-22 09:03:50,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:50,341 INFO L87 Difference]: Start difference. First operand 563 states and 842 transitions. Second operand 4 states. [2020-12-22 09:03:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:50,538 INFO L93 Difference]: Finished difference Result 1643 states and 2449 transitions. [2020-12-22 09:03:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:50,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 09:03:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:50,546 INFO L225 Difference]: With dead ends: 1643 [2020-12-22 09:03:50,546 INFO L226 Difference]: Without dead ends: 1089 [2020-12-22 09:03:50,549 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 09:03:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-12-22 09:03:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2020-12-22 09:03:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2020-12-22 09:03:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1608 transitions. [2020-12-22 09:03:50,611 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1608 transitions. Word has length 155 [2020-12-22 09:03:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:50,611 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 1608 transitions. [2020-12-22 09:03:50,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1608 transitions. [2020-12-22 09:03:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:03:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:50,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:50,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:03:50,618 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:50,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1611010681, now seen corresponding path program 1 times [2020-12-22 09:03:50,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:50,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738867553] [2020-12-22 09:03:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:50,718 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 09:03:50,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738867553] [2020-12-22 09:03:50,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:50,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716991632] [2020-12-22 09:03:50,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:50,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:50,725 INFO L87 Difference]: Start difference. First operand 1087 states and 1608 transitions. Second operand 3 states. [2020-12-22 09:03:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:50,840 INFO L93 Difference]: Finished difference Result 3223 states and 4762 transitions. [2020-12-22 09:03:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:50,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 09:03:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:50,854 INFO L225 Difference]: With dead ends: 3223 [2020-12-22 09:03:50,855 INFO L226 Difference]: Without dead ends: 2164 [2020-12-22 09:03:50,858 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 09:03:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2020-12-22 09:03:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1089. [2020-12-22 09:03:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1089 states. [2020-12-22 09:03:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1610 transitions. [2020-12-22 09:03:50,941 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1610 transitions. Word has length 156 [2020-12-22 09:03:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:50,950 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1610 transitions. [2020-12-22 09:03:50,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1610 transitions. [2020-12-22 09:03:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:03:50,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:50,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:50,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:03:50,955 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -580833396, now seen corresponding path program 1 times [2020-12-22 09:03:50,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:50,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803736981] [2020-12-22 09:03:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:51,314 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 09:03:51,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803736981] [2020-12-22 09:03:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:51,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12836383] [2020-12-22 09:03:51,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:51,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:51,322 INFO L87 Difference]: Start difference. First operand 1089 states and 1610 transitions. Second operand 4 states. [2020-12-22 09:03:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:51,681 INFO L93 Difference]: Finished difference Result 3149 states and 4634 transitions. [2020-12-22 09:03:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:51,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-12-22 09:03:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:51,694 INFO L225 Difference]: With dead ends: 3149 [2020-12-22 09:03:51,694 INFO L226 Difference]: Without dead ends: 2090 [2020-12-22 09:03:51,697 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 09:03:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-12-22 09:03:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-12-22 09:03:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-12-22 09:03:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3048 transitions. [2020-12-22 09:03:51,893 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3048 transitions. Word has length 157 [2020-12-22 09:03:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:51,893 INFO L481 AbstractCegarLoop]: Abstraction has 2088 states and 3048 transitions. [2020-12-22 09:03:51,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3048 transitions. [2020-12-22 09:03:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:03:51,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:51,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:51,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:03:51,900 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash 268848056, now seen corresponding path program 1 times [2020-12-22 09:03:51,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:51,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299001591] [2020-12-22 09:03:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:03:52,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299001591] [2020-12-22 09:03:52,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:52,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:52,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202252131] [2020-12-22 09:03:52,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:52,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:52,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,005 INFO L87 Difference]: Start difference. First operand 2088 states and 3048 transitions. Second operand 3 states. [2020-12-22 09:03:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:52,287 INFO L93 Difference]: Finished difference Result 6188 states and 9024 transitions. [2020-12-22 09:03:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:52,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 09:03:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:52,311 INFO L225 Difference]: With dead ends: 6188 [2020-12-22 09:03:52,311 INFO L226 Difference]: Without dead ends: 4144 [2020-12-22 09:03:52,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-12-22 09:03:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 2092. [2020-12-22 09:03:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2020-12-22 09:03:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 3052 transitions. [2020-12-22 09:03:52,554 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 3052 transitions. Word has length 158 [2020-12-22 09:03:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:52,555 INFO L481 AbstractCegarLoop]: Abstraction has 2092 states and 3052 transitions. [2020-12-22 09:03:52,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 3052 transitions. [2020-12-22 09:03:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:03:52,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:52,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:52,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:03:52,560 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1767168465, now seen corresponding path program 1 times [2020-12-22 09:03:52,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:52,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411740425] [2020-12-22 09:03:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:52,702 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 09:03:52,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411740425] [2020-12-22 09:03:52,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:52,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:52,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171793394] [2020-12-22 09:03:52,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:52,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:52,706 INFO L87 Difference]: Start difference. First operand 2092 states and 3052 transitions. Second operand 3 states. [2020-12-22 09:03:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:53,062 INFO L93 Difference]: Finished difference Result 5411 states and 7901 transitions. [2020-12-22 09:03:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:53,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-12-22 09:03:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:53,079 INFO L225 Difference]: With dead ends: 5411 [2020-12-22 09:03:53,080 INFO L226 Difference]: Without dead ends: 3651 [2020-12-22 09:03:53,083 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 09:03:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2020-12-22 09:03:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3649. [2020-12-22 09:03:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-12-22 09:03:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5243 transitions. [2020-12-22 09:03:53,347 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5243 transitions. Word has length 159 [2020-12-22 09:03:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:53,349 INFO L481 AbstractCegarLoop]: Abstraction has 3649 states and 5243 transitions. [2020-12-22 09:03:53,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5243 transitions. [2020-12-22 09:03:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:03:53,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:53,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:53,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:03:53,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1188374862, now seen corresponding path program 1 times [2020-12-22 09:03:53,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:53,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685959983] [2020-12-22 09:03:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:53,587 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 09:03:53,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685959983] [2020-12-22 09:03:53,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:53,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:53,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754192653] [2020-12-22 09:03:53,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:53,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:53,592 INFO L87 Difference]: Start difference. First operand 3649 states and 5243 transitions. Second operand 5 states. [2020-12-22 09:03:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:54,138 INFO L93 Difference]: Finished difference Result 10381 states and 14906 transitions. [2020-12-22 09:03:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:54,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-12-22 09:03:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:54,173 INFO L225 Difference]: With dead ends: 10381 [2020-12-22 09:03:54,174 INFO L226 Difference]: Without dead ends: 6769 [2020-12-22 09:03:54,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2020-12-22 09:03:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6767. [2020-12-22 09:03:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6767 states. [2020-12-22 09:03:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 9634 transitions. [2020-12-22 09:03:54,748 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 9634 transitions. Word has length 159 [2020-12-22 09:03:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:54,749 INFO L481 AbstractCegarLoop]: Abstraction has 6767 states and 9634 transitions. [2020-12-22 09:03:54,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 9634 transitions. [2020-12-22 09:03:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:03:54,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:54,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:54,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:03:54,760 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 504620971, now seen corresponding path program 1 times [2020-12-22 09:03:54,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:54,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973771486] [2020-12-22 09:03:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:54,944 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 09:03:54,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973771486] [2020-12-22 09:03:54,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:54,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:54,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428501599] [2020-12-22 09:03:54,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:54,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:54,947 INFO L87 Difference]: Start difference. First operand 6767 states and 9634 transitions. Second operand 4 states. [2020-12-22 09:03:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:55,489 INFO L93 Difference]: Finished difference Result 13796 states and 19550 transitions. [2020-12-22 09:03:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:55,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 09:03:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:55,524 INFO L225 Difference]: With dead ends: 13796 [2020-12-22 09:03:55,524 INFO L226 Difference]: Without dead ends: 7146 [2020-12-22 09:03:55,534 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 09:03:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2020-12-22 09:03:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 6991. [2020-12-22 09:03:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6991 states. [2020-12-22 09:03:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9886 transitions. [2020-12-22 09:03:56,033 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9886 transitions. Word has length 159 [2020-12-22 09:03:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 6991 states and 9886 transitions. [2020-12-22 09:03:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9886 transitions. [2020-12-22 09:03:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 09:03:56,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:56,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:56,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:03:56,046 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:56,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1391753097, now seen corresponding path program 1 times [2020-12-22 09:03:56,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:56,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139334450] [2020-12-22 09:03:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:56,105 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 09:03:56,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139334450] [2020-12-22 09:03:56,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:56,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987663279] [2020-12-22 09:03:56,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:56,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:56,108 INFO L87 Difference]: Start difference. First operand 6991 states and 9886 transitions. Second operand 3 states. [2020-12-22 09:03:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:56,922 INFO L93 Difference]: Finished difference Result 20247 states and 28724 transitions. [2020-12-22 09:03:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:56,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 09:03:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:56,961 INFO L225 Difference]: With dead ends: 20247 [2020-12-22 09:03:56,961 INFO L226 Difference]: Without dead ends: 13857 [2020-12-22 09:03:56,974 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 09:03:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2020-12-22 09:03:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 7007. [2020-12-22 09:03:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7007 states. [2020-12-22 09:03:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 9902 transitions. [2020-12-22 09:03:57,563 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 9902 transitions. Word has length 160 [2020-12-22 09:03:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:57,564 INFO L481 AbstractCegarLoop]: Abstraction has 7007 states and 9902 transitions. [2020-12-22 09:03:57,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 9902 transitions. [2020-12-22 09:03:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 09:03:57,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:57,576 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:57,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:03:57,576 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash -911721654, now seen corresponding path program 1 times [2020-12-22 09:03:57,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:57,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949618520] [2020-12-22 09:03:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:57,841 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 09:03:57,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949618520] [2020-12-22 09:03:57,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:57,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222673023] [2020-12-22 09:03:57,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:57,844 INFO L87 Difference]: Start difference. First operand 7007 states and 9902 transitions. Second operand 4 states. [2020-12-22 09:03:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:58,279 INFO L93 Difference]: Finished difference Result 14004 states and 19790 transitions. [2020-12-22 09:03:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:58,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-12-22 09:03:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:58,296 INFO L225 Difference]: With dead ends: 14004 [2020-12-22 09:03:58,296 INFO L226 Difference]: Without dead ends: 7005 [2020-12-22 09:03:58,306 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 09:03:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2020-12-22 09:03:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 7005. [2020-12-22 09:03:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7005 states. [2020-12-22 09:03:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7005 states to 7005 states and 9898 transitions. [2020-12-22 09:03:58,838 INFO L78 Accepts]: Start accepts. Automaton has 7005 states and 9898 transitions. Word has length 161 [2020-12-22 09:03:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:58,839 INFO L481 AbstractCegarLoop]: Abstraction has 7005 states and 9898 transitions. [2020-12-22 09:03:58,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7005 states and 9898 transitions. [2020-12-22 09:03:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 09:03:58,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:58,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:03:58,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:03:58,853 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2124598414, now seen corresponding path program 1 times [2020-12-22 09:03:58,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:58,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513982622] [2020-12-22 09:03:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:58,966 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 09:03:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513982622] [2020-12-22 09:03:58,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:58,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:58,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905233487] [2020-12-22 09:03:58,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:58,975 INFO L87 Difference]: Start difference. First operand 7005 states and 9898 transitions. Second operand 3 states. [2020-12-22 09:03:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:59,786 INFO L93 Difference]: Finished difference Result 16189 states and 22982 transitions. [2020-12-22 09:03:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:59,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-12-22 09:03:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:59,812 INFO L225 Difference]: With dead ends: 16189 [2020-12-22 09:03:59,813 INFO L226 Difference]: Without dead ends: 10395 [2020-12-22 09:03:59,823 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 09:03:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2020-12-22 09:04:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10393. [2020-12-22 09:04:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10393 states. [2020-12-22 09:04:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 14460 transitions. [2020-12-22 09:04:00,709 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 14460 transitions. Word has length 161 [2020-12-22 09:04:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:00,710 INFO L481 AbstractCegarLoop]: Abstraction has 10393 states and 14460 transitions. [2020-12-22 09:04:00,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 14460 transitions. [2020-12-22 09:04:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 09:04:00,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:00,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:00,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:04:00,728 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -727385235, now seen corresponding path program 1 times [2020-12-22 09:04:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536811689] [2020-12-22 09:04:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:00,888 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 09:04:00,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536811689] [2020-12-22 09:04:00,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:00,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:00,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910670315] [2020-12-22 09:04:00,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:00,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:00,891 INFO L87 Difference]: Start difference. First operand 10393 states and 14460 transitions. Second operand 3 states. [2020-12-22 09:04:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:01,687 INFO L93 Difference]: Finished difference Result 24303 states and 34628 transitions. [2020-12-22 09:04:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:01,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 09:04:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:01,725 INFO L225 Difference]: With dead ends: 24303 [2020-12-22 09:04:01,725 INFO L226 Difference]: Without dead ends: 15108 [2020-12-22 09:04:01,741 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 09:04:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2020-12-22 09:04:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 13181. [2020-12-22 09:04:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13181 states. [2020-12-22 09:04:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13181 states to 13181 states and 18914 transitions. [2020-12-22 09:04:02,919 INFO L78 Accepts]: Start accepts. Automaton has 13181 states and 18914 transitions. Word has length 163 [2020-12-22 09:04:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:02,919 INFO L481 AbstractCegarLoop]: Abstraction has 13181 states and 18914 transitions. [2020-12-22 09:04:02,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 13181 states and 18914 transitions. [2020-12-22 09:04:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 09:04:02,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:02,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:02,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:04:02,938 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1248523357, now seen corresponding path program 1 times [2020-12-22 09:04:02,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:02,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601828184] [2020-12-22 09:04:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:03,036 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 09:04:03,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601828184] [2020-12-22 09:04:03,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:03,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:03,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205872610] [2020-12-22 09:04:03,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:03,039 INFO L87 Difference]: Start difference. First operand 13181 states and 18914 transitions. Second operand 3 states. [2020-12-22 09:04:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:04,013 INFO L93 Difference]: Finished difference Result 29139 states and 42714 transitions. [2020-12-22 09:04:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:04,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2020-12-22 09:04:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:04,058 INFO L225 Difference]: With dead ends: 29139 [2020-12-22 09:04:04,058 INFO L226 Difference]: Without dead ends: 19243 [2020-12-22 09:04:04,076 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 09:04:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2020-12-22 09:04:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 17437. [2020-12-22 09:04:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17437 states. [2020-12-22 09:04:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25648 transitions. [2020-12-22 09:04:05,621 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25648 transitions. Word has length 165 [2020-12-22 09:04:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:05,621 INFO L481 AbstractCegarLoop]: Abstraction has 17437 states and 25648 transitions. [2020-12-22 09:04:05,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25648 transitions. [2020-12-22 09:04:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:05,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:05,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:05,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:04:05,635 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash -846552929, now seen corresponding path program 1 times [2020-12-22 09:04:05,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:05,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426472450] [2020-12-22 09:04:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:05,751 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 09:04:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426472450] [2020-12-22 09:04:05,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:05,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:05,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81778034] [2020-12-22 09:04:05,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:05,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:05,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:05,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:05,754 INFO L87 Difference]: Start difference. First operand 17437 states and 25648 transitions. Second operand 5 states. [2020-12-22 09:04:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:07,135 INFO L93 Difference]: Finished difference Result 33724 states and 49986 transitions. [2020-12-22 09:04:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:04:07,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 09:04:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:07,163 INFO L225 Difference]: With dead ends: 33724 [2020-12-22 09:04:07,163 INFO L226 Difference]: Without dead ends: 17437 [2020-12-22 09:04:07,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:04:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17437 states. [2020-12-22 09:04:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17437 to 17437. [2020-12-22 09:04:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17437 states. [2020-12-22 09:04:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17437 states to 17437 states and 25410 transitions. [2020-12-22 09:04:08,624 INFO L78 Accepts]: Start accepts. Automaton has 17437 states and 25410 transitions. Word has length 166 [2020-12-22 09:04:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:08,625 INFO L481 AbstractCegarLoop]: Abstraction has 17437 states and 25410 transitions. [2020-12-22 09:04:08,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 17437 states and 25410 transitions. [2020-12-22 09:04:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:08,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:08,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:04:08,643 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -316024710, now seen corresponding path program 1 times [2020-12-22 09:04:08,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:08,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410629509] [2020-12-22 09:04:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410629509] [2020-12-22 09:04:08,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:08,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070991298] [2020-12-22 09:04:08,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:08,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:08,961 INFO L87 Difference]: Start difference. First operand 17437 states and 25410 transitions. Second operand 4 states. [2020-12-22 09:04:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:11,223 INFO L93 Difference]: Finished difference Result 43679 states and 65710 transitions. [2020-12-22 09:04:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:11,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:04:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:11,263 INFO L225 Difference]: With dead ends: 43679 [2020-12-22 09:04:11,263 INFO L226 Difference]: Without dead ends: 32388 [2020-12-22 09:04:11,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 09:04:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32388 states. [2020-12-22 09:04:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32388 to 32386. [2020-12-22 09:04:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32386 states. [2020-12-22 09:04:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32386 states to 32386 states and 47679 transitions. [2020-12-22 09:04:13,568 INFO L78 Accepts]: Start accepts. Automaton has 32386 states and 47679 transitions. Word has length 166 [2020-12-22 09:04:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:13,569 INFO L481 AbstractCegarLoop]: Abstraction has 32386 states and 47679 transitions. [2020-12-22 09:04:13,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32386 states and 47679 transitions. [2020-12-22 09:04:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:13,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:13,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:13,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:13,585 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:13,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash 105363050, now seen corresponding path program 1 times [2020-12-22 09:04:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850667005] [2020-12-22 09:04:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:13,756 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 09:04:13,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850667005] [2020-12-22 09:04:13,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:13,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545662195] [2020-12-22 09:04:13,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:13,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:13,761 INFO L87 Difference]: Start difference. First operand 32386 states and 47679 transitions. Second operand 5 states. [2020-12-22 09:04:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:18,922 INFO L93 Difference]: Finished difference Result 81978 states and 125897 transitions. [2020-12-22 09:04:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:04:18,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 09:04:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:19,021 INFO L225 Difference]: With dead ends: 81978 [2020-12-22 09:04:19,022 INFO L226 Difference]: Without dead ends: 71608 [2020-12-22 09:04:19,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:04:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71608 states. [2020-12-22 09:04:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71608 to 53386. [2020-12-22 09:04:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53386 states. [2020-12-22 09:04:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 80575 transitions. [2020-12-22 09:04:23,406 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 80575 transitions. Word has length 166 [2020-12-22 09:04:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:23,407 INFO L481 AbstractCegarLoop]: Abstraction has 53386 states and 80575 transitions. [2020-12-22 09:04:23,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 80575 transitions. [2020-12-22 09:04:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:23,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:23,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:23,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:04:23,419 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash 937564653, now seen corresponding path program 1 times [2020-12-22 09:04:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124221546] [2020-12-22 09:04:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:23,659 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 09:04:23,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124221546] [2020-12-22 09:04:23,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:23,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:23,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140175406] [2020-12-22 09:04:23,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:23,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:23,662 INFO L87 Difference]: Start difference. First operand 53386 states and 80575 transitions. Second operand 3 states. [2020-12-22 09:04:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:30,100 INFO L93 Difference]: Finished difference Result 135200 states and 207035 transitions. [2020-12-22 09:04:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:30,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 09:04:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:30,248 INFO L225 Difference]: With dead ends: 135200 [2020-12-22 09:04:30,248 INFO L226 Difference]: Without dead ends: 92730 [2020-12-22 09:04:30,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92730 states. [2020-12-22 09:04:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92730 to 92728. [2020-12-22 09:04:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92728 states. [2020-12-22 09:04:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92728 states to 92728 states and 139861 transitions. [2020-12-22 09:04:37,789 INFO L78 Accepts]: Start accepts. Automaton has 92728 states and 139861 transitions. Word has length 166 [2020-12-22 09:04:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:37,789 INFO L481 AbstractCegarLoop]: Abstraction has 92728 states and 139861 transitions. [2020-12-22 09:04:37,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 92728 states and 139861 transitions. [2020-12-22 09:04:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:37,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:37,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:37,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:04:37,807 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash 251154677, now seen corresponding path program 1 times [2020-12-22 09:04:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:37,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314172252] [2020-12-22 09:04:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:38,018 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 09:04:38,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314172252] [2020-12-22 09:04:38,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:38,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538658125] [2020-12-22 09:04:38,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:38,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:38,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:38,028 INFO L87 Difference]: Start difference. First operand 92728 states and 139861 transitions. Second operand 4 states. [2020-12-22 09:04:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:48,457 INFO L93 Difference]: Finished difference Result 226961 states and 342081 transitions. [2020-12-22 09:04:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:48,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:04:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:48,851 INFO L225 Difference]: With dead ends: 226961 [2020-12-22 09:04:48,851 INFO L226 Difference]: Without dead ends: 134581 [2020-12-22 09:04:48,936 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 09:04:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134581 states. [2020-12-22 09:05:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134581 to 134579. [2020-12-22 09:05:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134579 states. [2020-12-22 09:05:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134579 states to 134579 states and 200374 transitions. [2020-12-22 09:05:00,454 INFO L78 Accepts]: Start accepts. Automaton has 134579 states and 200374 transitions. Word has length 166 [2020-12-22 09:05:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:00,454 INFO L481 AbstractCegarLoop]: Abstraction has 134579 states and 200374 transitions. [2020-12-22 09:05:00,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 134579 states and 200374 transitions. [2020-12-22 09:05:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:05:00,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:00,491 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, 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 09:05:00,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:05:00,491 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash 926924829, now seen corresponding path program 1 times [2020-12-22 09:05:00,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:00,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913415335] [2020-12-22 09:05:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:00,643 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 09:05:00,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913415335] [2020-12-22 09:05:00,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:00,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305465451] [2020-12-22 09:05:00,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:00,647 INFO L87 Difference]: Start difference. First operand 134579 states and 200374 transitions. Second operand 4 states. [2020-12-22 09:05:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:10,422 INFO L93 Difference]: Finished difference Result 224205 states and 333625 transitions. [2020-12-22 09:05:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:10,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-12-22 09:05:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:10,661 INFO L225 Difference]: With dead ends: 224205 [2020-12-22 09:05:10,661 INFO L226 Difference]: Without dead ends: 122111 [2020-12-22 09:05:10,906 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 09:05:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122111 states. [2020-12-22 09:05:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122111 to 122111. [2020-12-22 09:05:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122111 states. [2020-12-22 09:05:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122111 states to 122111 states and 181778 transitions. [2020-12-22 09:05:21,302 INFO L78 Accepts]: Start accepts. Automaton has 122111 states and 181778 transitions. Word has length 168 [2020-12-22 09:05:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:21,303 INFO L481 AbstractCegarLoop]: Abstraction has 122111 states and 181778 transitions. [2020-12-22 09:05:21,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 122111 states and 181778 transitions. [2020-12-22 09:05:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 09:05:21,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:21,362 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, 1, 1, 1, 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 09:05:21,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:05:21,362 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1059303823, now seen corresponding path program 1 times [2020-12-22 09:05:21,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:21,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177246408] [2020-12-22 09:05:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:21,458 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 09:05:21,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177246408] [2020-12-22 09:05:21,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:21,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:21,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961514450] [2020-12-22 09:05:21,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:21,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:21,461 INFO L87 Difference]: Start difference. First operand 122111 states and 181778 transitions. Second operand 3 states.