/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.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:03:17,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:03:17,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:03:17,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 09:03:17,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:03:17,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:03:17,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:03:17,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:03:17,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:03:17,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:03:17,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:03:17,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:03:17,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:03:17,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:03:17,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:03:17,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:03:17,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:03:17,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:03:17,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:03:17,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:03:17,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:03:17,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:03:17,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:03:17,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:03:17,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:03:17,342 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:03:17,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:03:17,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:03:17,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:03:17,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:03:17,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:03:17,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:03:17,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:03:17,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:03:17,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:03:17,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:03:17,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:03:17,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:03:17,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:03:17,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:03:17,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:03:17,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:03:17,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:03:17,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:03:17,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:03:17,346 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:03:17,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:03:17,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:03:17,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:03:17,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:03:17,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:03:17,749 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:03:17,750 INFO L432 ainManager$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.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:03:17,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccec0d87/435312fdf8ee4137afdad264498ea52a/FLAG50eae0593 [2020-12-22 09:03:18,527 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:03:18,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:03:18,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccec0d87/435312fdf8ee4137afdad264498ea52a/FLAG50eae0593 [2020-12-22 09:03:18,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ccec0d87/435312fdf8ee4137afdad264498ea52a [2020-12-22 09:03:18,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:03:18,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:03:18,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:18,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:03:18,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:03:18,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:18" (1/1) ... [2020-12-22 09:03:18,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4251d67b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:18, skipping insertion in model container [2020-12-22 09:03:18,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:03:18" (1/1) ... [2020-12-22 09:03:18,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:03:18,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:03:19,397 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.BOUNDED-6.pals.c.v+nlh-reducer.c[15564,15577] [2020-12-22 09:03:19,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:19,623 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:03:19,815 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.BOUNDED-6.pals.c.v+nlh-reducer.c[15564,15577] [2020-12-22 09:03:19,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:03:19,926 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:03:19,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19 WrapperNode [2020-12-22 09:03:19,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:03:19,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:19,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:03:19,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:03:19,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:19,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:03:20,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:03:20,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:03:20,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:03:20,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (1/1) ... [2020-12-22 09:03:20,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:03:20,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:03:20,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:03:20,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:03:20,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (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 09:03:20,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:03:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:03:20,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:03:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:03:21,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:03:21,797 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:03:21,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:21 BoogieIcfgContainer [2020-12-22 09:03:21,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:03:21,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:03:21,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:03:21,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:03:21,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:03:18" (1/3) ... [2020-12-22 09:03:21,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3b47e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:21, skipping insertion in model container [2020-12-22 09:03:21,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:03:19" (2/3) ... [2020-12-22 09:03:21,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3b47e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:03:21, skipping insertion in model container [2020-12-22 09:03:21,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:03:21" (3/3) ... [2020-12-22 09:03:21,810 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-12-22 09:03:21,818 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:03:21,824 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:03:21,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:03:21,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:03:21,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:03:21,886 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:03:21,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:03:21,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:03:21,887 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:03:21,887 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:03:21,887 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:03:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states. [2020-12-22 09:03:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:03:21,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:21,974 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] [2020-12-22 09:03:21,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1686891750, now seen corresponding path program 1 times [2020-12-22 09:03:22,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:22,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544178804] [2020-12-22 09:03:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:03:22,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544178804] [2020-12-22 09:03:22,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:22,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067552939] [2020-12-22 09:03:22,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:22,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:22,767 INFO L87 Difference]: Start difference. First operand 337 states. Second operand 3 states. [2020-12-22 09:03:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:22,982 INFO L93 Difference]: Finished difference Result 664 states and 1156 transitions. [2020-12-22 09:03:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:22,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-22 09:03:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:23,027 INFO L225 Difference]: With dead ends: 664 [2020-12-22 09:03:23,028 INFO L226 Difference]: Without dead ends: 543 [2020-12-22 09:03:23,037 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 09:03:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-12-22 09:03:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2020-12-22 09:03:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-12-22 09:03:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 810 transitions. [2020-12-22 09:03:23,191 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 810 transitions. Word has length 153 [2020-12-22 09:03:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:23,192 INFO L481 AbstractCegarLoop]: Abstraction has 541 states and 810 transitions. [2020-12-22 09:03:23,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 810 transitions. [2020-12-22 09:03:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:03:23,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:23,200 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] [2020-12-22 09:03:23,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:03:23,202 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:23,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:23,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2064713451, now seen corresponding path program 1 times [2020-12-22 09:03:23,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:23,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389779365] [2020-12-22 09:03:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:23,588 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 09:03:23,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389779365] [2020-12-22 09:03:23,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:23,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:23,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456421239] [2020-12-22 09:03:23,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:23,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:23,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:23,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:23,593 INFO L87 Difference]: Start difference. First operand 541 states and 810 transitions. Second operand 4 states. [2020-12-22 09:03:23,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:23,730 INFO L93 Difference]: Finished difference Result 1576 states and 2351 transitions. [2020-12-22 09:03:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:23,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-12-22 09:03:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:23,737 INFO L225 Difference]: With dead ends: 1576 [2020-12-22 09:03:23,737 INFO L226 Difference]: Without dead ends: 1044 [2020-12-22 09:03:23,741 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 09:03:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-12-22 09:03:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1042. [2020-12-22 09:03:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-12-22 09:03:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1543 transitions. [2020-12-22 09:03:23,799 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1543 transitions. Word has length 153 [2020-12-22 09:03:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:23,799 INFO L481 AbstractCegarLoop]: Abstraction has 1042 states and 1543 transitions. [2020-12-22 09:03:23,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1543 transitions. [2020-12-22 09:03:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:03:23,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:23,806 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] [2020-12-22 09:03:23,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:03:23,806 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2039605151, now seen corresponding path program 1 times [2020-12-22 09:03:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:23,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250846432] [2020-12-22 09:03:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:23,907 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 09:03:23,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250846432] [2020-12-22 09:03:23,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:23,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202280572] [2020-12-22 09:03:23,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:23,910 INFO L87 Difference]: Start difference. First operand 1042 states and 1543 transitions. Second operand 3 states. [2020-12-22 09:03:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:24,003 INFO L93 Difference]: Finished difference Result 3088 states and 4567 transitions. [2020-12-22 09:03:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:24,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-12-22 09:03:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:24,015 INFO L225 Difference]: With dead ends: 3088 [2020-12-22 09:03:24,015 INFO L226 Difference]: Without dead ends: 2074 [2020-12-22 09:03:24,018 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 09:03:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-12-22 09:03:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1044. [2020-12-22 09:03:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1044 states. [2020-12-22 09:03:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1545 transitions. [2020-12-22 09:03:24,089 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1545 transitions. Word has length 154 [2020-12-22 09:03:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:24,090 INFO L481 AbstractCegarLoop]: Abstraction has 1044 states and 1545 transitions. [2020-12-22 09:03:24,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1545 transitions. [2020-12-22 09:03:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:03:24,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:24,094 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 09:03:24,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:03:24,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1427333698, now seen corresponding path program 1 times [2020-12-22 09:03:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:24,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735910229] [2020-12-22 09:03:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:24,213 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 09:03:24,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735910229] [2020-12-22 09:03:24,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:24,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413682662] [2020-12-22 09:03:24,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:24,216 INFO L87 Difference]: Start difference. First operand 1044 states and 1545 transitions. Second operand 3 states. [2020-12-22 09:03:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:24,380 INFO L93 Difference]: Finished difference Result 2685 states and 3975 transitions. [2020-12-22 09:03:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:24,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:03:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:24,390 INFO L225 Difference]: With dead ends: 2685 [2020-12-22 09:03:24,391 INFO L226 Difference]: Without dead ends: 1836 [2020-12-22 09:03:24,392 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 09:03:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2020-12-22 09:03:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1834. [2020-12-22 09:03:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1834 states. [2020-12-22 09:03:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 2677 transitions. [2020-12-22 09:03:24,499 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 2677 transitions. Word has length 155 [2020-12-22 09:03:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:24,500 INFO L481 AbstractCegarLoop]: Abstraction has 1834 states and 2677 transitions. [2020-12-22 09:03:24,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 2677 transitions. [2020-12-22 09:03:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:03:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:24,505 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 09:03:24,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:03:24,505 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -697762299, now seen corresponding path program 1 times [2020-12-22 09:03:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:24,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837692817] [2020-12-22 09:03:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:24,826 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 09:03:24,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837692817] [2020-12-22 09:03:24,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:24,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:24,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21266335] [2020-12-22 09:03:24,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:24,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:24,831 INFO L87 Difference]: Start difference. First operand 1834 states and 2677 transitions. Second operand 5 states. [2020-12-22 09:03:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:25,238 INFO L93 Difference]: Finished difference Result 5180 states and 7552 transitions. [2020-12-22 09:03:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:25,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-12-22 09:03:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:25,259 INFO L225 Difference]: With dead ends: 5180 [2020-12-22 09:03:25,260 INFO L226 Difference]: Without dead ends: 3360 [2020-12-22 09:03:25,266 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 09:03:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-12-22 09:03:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3358. [2020-12-22 09:03:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3358 states. [2020-12-22 09:03:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4850 transitions. [2020-12-22 09:03:25,543 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4850 transitions. Word has length 155 [2020-12-22 09:03:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:25,544 INFO L481 AbstractCegarLoop]: Abstraction has 3358 states and 4850 transitions. [2020-12-22 09:03:25,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4850 transitions. [2020-12-22 09:03:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:03:25,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:25,550 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 09:03:25,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:03:25,552 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1444100468, now seen corresponding path program 1 times [2020-12-22 09:03:25,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:25,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024733245] [2020-12-22 09:03:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:25,826 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 09:03:25,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024733245] [2020-12-22 09:03:25,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:25,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:25,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529166002] [2020-12-22 09:03:25,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:25,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:25,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:25,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:25,829 INFO L87 Difference]: Start difference. First operand 3358 states and 4850 transitions. Second operand 4 states. [2020-12-22 09:03:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:26,334 INFO L93 Difference]: Finished difference Result 9771 states and 14053 transitions. [2020-12-22 09:03:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:26,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-12-22 09:03:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:26,369 INFO L225 Difference]: With dead ends: 9771 [2020-12-22 09:03:26,369 INFO L226 Difference]: Without dead ends: 6469 [2020-12-22 09:03:26,376 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 09:03:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2020-12-22 09:03:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6467. [2020-12-22 09:03:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6467 states. [2020-12-22 09:03:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6467 states to 6467 states and 9211 transitions. [2020-12-22 09:03:26,885 INFO L78 Accepts]: Start accepts. Automaton has 6467 states and 9211 transitions. Word has length 155 [2020-12-22 09:03:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:26,885 INFO L481 AbstractCegarLoop]: Abstraction has 6467 states and 9211 transitions. [2020-12-22 09:03:26,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6467 states and 9211 transitions. [2020-12-22 09:03:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:03:26,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:26,896 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 09:03:26,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:03:26,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:26,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1505045856, now seen corresponding path program 1 times [2020-12-22 09:03:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:26,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436697265] [2020-12-22 09:03:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:27,016 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 09:03:27,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436697265] [2020-12-22 09:03:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:27,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:27,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264731149] [2020-12-22 09:03:27,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:27,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:27,020 INFO L87 Difference]: Start difference. First operand 6467 states and 9211 transitions. Second operand 3 states. [2020-12-22 09:03:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:27,865 INFO L93 Difference]: Finished difference Result 19249 states and 27400 transitions. [2020-12-22 09:03:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:27,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 156 [2020-12-22 09:03:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:27,946 INFO L225 Difference]: With dead ends: 19249 [2020-12-22 09:03:27,946 INFO L226 Difference]: Without dead ends: 12873 [2020-12-22 09:03:27,959 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 09:03:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12873 states. [2020-12-22 09:03:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 6477. [2020-12-22 09:03:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6477 states. [2020-12-22 09:03:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 9221 transitions. [2020-12-22 09:03:28,563 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 9221 transitions. Word has length 156 [2020-12-22 09:03:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:28,564 INFO L481 AbstractCegarLoop]: Abstraction has 6477 states and 9221 transitions. [2020-12-22 09:03:28,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 9221 transitions. [2020-12-22 09:03:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:03:28,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:28,579 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 09:03:28,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:03:28,579 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1440271021, now seen corresponding path program 1 times [2020-12-22 09:03:28,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:28,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006425667] [2020-12-22 09:03:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:28,790 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 09:03:28,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006425667] [2020-12-22 09:03:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:28,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:28,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630181360] [2020-12-22 09:03:28,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:28,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:28,793 INFO L87 Difference]: Start difference. First operand 6477 states and 9221 transitions. Second operand 4 states. [2020-12-22 09:03:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:29,622 INFO L93 Difference]: Finished difference Result 18755 states and 26616 transitions. [2020-12-22 09:03:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:29,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-12-22 09:03:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:29,657 INFO L225 Difference]: With dead ends: 18755 [2020-12-22 09:03:29,658 INFO L226 Difference]: Without dead ends: 12379 [2020-12-22 09:03:29,670 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 09:03:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12379 states. [2020-12-22 09:03:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12379 to 12377. [2020-12-22 09:03:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12377 states. [2020-12-22 09:03:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12377 states to 12377 states and 17383 transitions. [2020-12-22 09:03:30,741 INFO L78 Accepts]: Start accepts. Automaton has 12377 states and 17383 transitions. Word has length 157 [2020-12-22 09:03:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:30,742 INFO L481 AbstractCegarLoop]: Abstraction has 12377 states and 17383 transitions. [2020-12-22 09:03:30,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 12377 states and 17383 transitions. [2020-12-22 09:03:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:03:30,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:30,763 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 09:03:30,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:03:30,764 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash 118105567, now seen corresponding path program 1 times [2020-12-22 09:03:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008312439] [2020-12-22 09:03:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:30,857 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 09:03:30,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008312439] [2020-12-22 09:03:30,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:30,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428615806] [2020-12-22 09:03:30,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:30,866 INFO L87 Difference]: Start difference. First operand 12377 states and 17383 transitions. Second operand 3 states. [2020-12-22 09:03:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:32,067 INFO L93 Difference]: Finished difference Result 35905 states and 50587 transitions. [2020-12-22 09:03:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:32,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 09:03:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:32,120 INFO L225 Difference]: With dead ends: 35905 [2020-12-22 09:03:32,120 INFO L226 Difference]: Without dead ends: 24471 [2020-12-22 09:03:32,142 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 09:03:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24471 states. [2020-12-22 09:03:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24471 to 12397. [2020-12-22 09:03:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12397 states. [2020-12-22 09:03:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12397 states to 12397 states and 17403 transitions. [2020-12-22 09:03:33,233 INFO L78 Accepts]: Start accepts. Automaton has 12397 states and 17403 transitions. Word has length 158 [2020-12-22 09:03:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:33,233 INFO L481 AbstractCegarLoop]: Abstraction has 12397 states and 17403 transitions. [2020-12-22 09:03:33,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 12397 states and 17403 transitions. [2020-12-22 09:03:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:03:33,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:33,252 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 09:03:33,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:03:33,253 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2082450610, now seen corresponding path program 1 times [2020-12-22 09:03:33,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:33,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956472490] [2020-12-22 09:03:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:33,465 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 09:03:33,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956472490] [2020-12-22 09:03:33,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:33,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:03:33,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993259812] [2020-12-22 09:03:33,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:03:33,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:03:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:03:33,467 INFO L87 Difference]: Start difference. First operand 12397 states and 17403 transitions. Second operand 4 states. [2020-12-22 09:03:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:34,193 INFO L93 Difference]: Finished difference Result 20718 states and 29194 transitions. [2020-12-22 09:03:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:03:34,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-12-22 09:03:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:34,215 INFO L225 Difference]: With dead ends: 20718 [2020-12-22 09:03:34,215 INFO L226 Difference]: Without dead ends: 8890 [2020-12-22 09:03:34,233 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 09:03:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8890 states. [2020-12-22 09:03:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8890 to 8890. [2020-12-22 09:03:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8890 states. [2020-12-22 09:03:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 12501 transitions. [2020-12-22 09:03:34,927 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 12501 transitions. Word has length 159 [2020-12-22 09:03:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:34,927 INFO L481 AbstractCegarLoop]: Abstraction has 8890 states and 12501 transitions. [2020-12-22 09:03:34,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 12501 transitions. [2020-12-22 09:03:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 09:03:34,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:34,942 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 09:03:34,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:03:34,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:34,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:34,943 INFO L82 PathProgramCache]: Analyzing trace with hash -963424656, now seen corresponding path program 1 times [2020-12-22 09:03:34,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:34,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150892498] [2020-12-22 09:03:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:35,017 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 09:03:35,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150892498] [2020-12-22 09:03:35,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:35,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:35,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706180497] [2020-12-22 09:03:35,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:35,020 INFO L87 Difference]: Start difference. First operand 8890 states and 12501 transitions. Second operand 3 states. [2020-12-22 09:03:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:35,778 INFO L93 Difference]: Finished difference Result 21426 states and 30719 transitions. [2020-12-22 09:03:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:35,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 09:03:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:35,807 INFO L225 Difference]: With dead ends: 21426 [2020-12-22 09:03:35,807 INFO L226 Difference]: Without dead ends: 13276 [2020-12-22 09:03:35,818 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 09:03:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13276 states. [2020-12-22 09:03:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13276 to 11474. [2020-12-22 09:03:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11474 states. [2020-12-22 09:03:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11474 states to 11474 states and 16609 transitions. [2020-12-22 09:03:36,744 INFO L78 Accepts]: Start accepts. Automaton has 11474 states and 16609 transitions. Word has length 163 [2020-12-22 09:03:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 11474 states and 16609 transitions. [2020-12-22 09:03:36,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 11474 states and 16609 transitions. [2020-12-22 09:03:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:03:36,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:36,761 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 09:03:36,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:03:36,761 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash -82600529, now seen corresponding path program 1 times [2020-12-22 09:03:36,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:36,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899778610] [2020-12-22 09:03:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:36,894 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 09:03:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899778610] [2020-12-22 09:03:36,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:36,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:36,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201165021] [2020-12-22 09:03:36,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:36,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:36,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:36,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:36,897 INFO L87 Difference]: Start difference. First operand 11474 states and 16609 transitions. Second operand 3 states. [2020-12-22 09:03:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:37,907 INFO L93 Difference]: Finished difference Result 31844 states and 46303 transitions. [2020-12-22 09:03:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:37,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 09:03:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:37,947 INFO L225 Difference]: With dead ends: 31844 [2020-12-22 09:03:37,947 INFO L226 Difference]: Without dead ends: 21590 [2020-12-22 09:03:37,966 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 09:03:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21590 states. [2020-12-22 09:03:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21590 to 21588. [2020-12-22 09:03:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21588 states. [2020-12-22 09:03:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21588 states to 21588 states and 30909 transitions. [2020-12-22 09:03:39,626 INFO L78 Accepts]: Start accepts. Automaton has 21588 states and 30909 transitions. Word has length 166 [2020-12-22 09:03:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:39,627 INFO L481 AbstractCegarLoop]: Abstraction has 21588 states and 30909 transitions. [2020-12-22 09:03:39,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21588 states and 30909 transitions. [2020-12-22 09:03:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:03:39,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:39,652 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 09:03:39,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:03:39,652 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:39,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1261597364, now seen corresponding path program 1 times [2020-12-22 09:03:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:39,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843147613] [2020-12-22 09:03:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:39,865 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 09:03:39,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843147613] [2020-12-22 09:03:39,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:39,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:39,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789443178] [2020-12-22 09:03:39,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:39,869 INFO L87 Difference]: Start difference. First operand 21588 states and 30909 transitions. Second operand 5 states. [2020-12-22 09:03:42,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:42,771 INFO L93 Difference]: Finished difference Result 56532 states and 86001 transitions. [2020-12-22 09:03:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:03:42,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 09:03:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:42,838 INFO L225 Difference]: With dead ends: 56532 [2020-12-22 09:03:42,838 INFO L226 Difference]: Without dead ends: 45818 [2020-12-22 09:03:42,859 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 09:03:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45818 states. [2020-12-22 09:03:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45818 to 34176. [2020-12-22 09:03:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34176 states. [2020-12-22 09:03:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34176 states to 34176 states and 50561 transitions. [2020-12-22 09:03:45,439 INFO L78 Accepts]: Start accepts. Automaton has 34176 states and 50561 transitions. Word has length 166 [2020-12-22 09:03:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:45,439 INFO L481 AbstractCegarLoop]: Abstraction has 34176 states and 50561 transitions. [2020-12-22 09:03:45,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 34176 states and 50561 transitions. [2020-12-22 09:03:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:03:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:45,457 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 09:03:45,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:03:45,458 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1744552769, now seen corresponding path program 1 times [2020-12-22 09:03:45,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750678647] [2020-12-22 09:03:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:45,698 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 09:03:45,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750678647] [2020-12-22 09:03:45,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:45,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737369735] [2020-12-22 09:03:45,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:45,702 INFO L87 Difference]: Start difference. First operand 34176 states and 50561 transitions. Second operand 3 states. [2020-12-22 09:03:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:48,967 INFO L93 Difference]: Finished difference Result 76088 states and 114847 transitions. [2020-12-22 09:03:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:48,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 09:03:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:49,060 INFO L225 Difference]: With dead ends: 76088 [2020-12-22 09:03:49,061 INFO L226 Difference]: Without dead ends: 53182 [2020-12-22 09:03:49,089 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 09:03:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53182 states. [2020-12-22 09:03:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53182 to 53180. [2020-12-22 09:03:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53180 states. [2020-12-22 09:03:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53180 states to 53180 states and 78253 transitions. [2020-12-22 09:03:52,780 INFO L78 Accepts]: Start accepts. Automaton has 53180 states and 78253 transitions. Word has length 166 [2020-12-22 09:03:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:52,781 INFO L481 AbstractCegarLoop]: Abstraction has 53180 states and 78253 transitions. [2020-12-22 09:03:52,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:03:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 53180 states and 78253 transitions. [2020-12-22 09:03:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:03:52,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:52,801 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 09:03:52,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:03:52,801 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1639419065, now seen corresponding path program 1 times [2020-12-22 09:03:52,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:52,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950851282] [2020-12-22 09:03:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:53,155 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 09:03:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950851282] [2020-12-22 09:03:53,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:53,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:03:53,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792533978] [2020-12-22 09:03:53,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:03:53,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:03:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:03:53,159 INFO L87 Difference]: Start difference. First operand 53180 states and 78253 transitions. Second operand 8 states. [2020-12-22 09:04:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:05,774 INFO L93 Difference]: Finished difference Result 199414 states and 298635 transitions. [2020-12-22 09:04:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:04:05,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-22 09:04:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:06,039 INFO L225 Difference]: With dead ends: 199414 [2020-12-22 09:04:06,039 INFO L226 Difference]: Without dead ends: 152006 [2020-12-22 09:04:06,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:04:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152006 states. [2020-12-22 09:04:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152006 to 76204. [2020-12-22 09:04:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76204 states. [2020-12-22 09:04:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76204 states to 76204 states and 110417 transitions. [2020-12-22 09:04:13,023 INFO L78 Accepts]: Start accepts. Automaton has 76204 states and 110417 transitions. Word has length 166 [2020-12-22 09:04:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:13,024 INFO L481 AbstractCegarLoop]: Abstraction has 76204 states and 110417 transitions. [2020-12-22 09:04:13,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:04:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 76204 states and 110417 transitions. [2020-12-22 09:04:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 09:04:13,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:13,052 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 09:04:13,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:13,052 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash 34755477, now seen corresponding path program 1 times [2020-12-22 09:04:13,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:13,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525255980] [2020-12-22 09:04:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:13,226 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 09:04:13,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525255980] [2020-12-22 09:04:13,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:13,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:13,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837303985] [2020-12-22 09:04:13,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:13,228 INFO L87 Difference]: Start difference. First operand 76204 states and 110417 transitions. Second operand 4 states. [2020-12-22 09:04:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:18,849 INFO L93 Difference]: Finished difference Result 131913 states and 191148 transitions. [2020-12-22 09:04:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:18,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 09:04:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:18,961 INFO L225 Difference]: With dead ends: 131913 [2020-12-22 09:04:18,961 INFO L226 Difference]: Without dead ends: 68293 [2020-12-22 09:04:19,014 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 09:04:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68293 states. [2020-12-22 09:04:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68293 to 68293. [2020-12-22 09:04:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68293 states. [2020-12-22 09:04:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68293 states to 68293 states and 98970 transitions. [2020-12-22 09:04:24,638 INFO L78 Accepts]: Start accepts. Automaton has 68293 states and 98970 transitions. Word has length 166 [2020-12-22 09:04:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:24,638 INFO L481 AbstractCegarLoop]: Abstraction has 68293 states and 98970 transitions. [2020-12-22 09:04:24,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68293 states and 98970 transitions. [2020-12-22 09:04:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 09:04:24,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:24,670 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] [2020-12-22 09:04:24,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:04:24,671 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash 506466000, now seen corresponding path program 1 times [2020-12-22 09:04:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:24,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662101780] [2020-12-22 09:04:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:24,748 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 09:04:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662101780] [2020-12-22 09:04:24,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810499438] [2020-12-22 09:04:24,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:24,750 INFO L87 Difference]: Start difference. First operand 68293 states and 98970 transitions. Second operand 3 states. [2020-12-22 09:04:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:32,935 INFO L93 Difference]: Finished difference Result 165665 states and 241972 transitions. [2020-12-22 09:04:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:32,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 09:04:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:33,108 INFO L225 Difference]: With dead ends: 165665 [2020-12-22 09:04:33,109 INFO L226 Difference]: Without dead ends: 109840 [2020-12-22 09:04:33,155 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 09:04:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109840 states. [2020-12-22 09:04:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109840 to 99256. [2020-12-22 09:04:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99256 states. [2020-12-22 09:04:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99256 states to 99256 states and 146961 transitions. [2020-12-22 09:04:41,495 INFO L78 Accepts]: Start accepts. Automaton has 99256 states and 146961 transitions. Word has length 170 [2020-12-22 09:04:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:41,495 INFO L481 AbstractCegarLoop]: Abstraction has 99256 states and 146961 transitions. [2020-12-22 09:04:41,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 99256 states and 146961 transitions. [2020-12-22 09:04:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 09:04:41,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:41,518 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] [2020-12-22 09:04:41,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:04:41,519 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash 580410345, now seen corresponding path program 1 times [2020-12-22 09:04:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:41,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523764981] [2020-12-22 09:04:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:41,599 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 09:04:41,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523764981] [2020-12-22 09:04:41,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:41,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:41,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047074229] [2020-12-22 09:04:41,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:41,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:41,602 INFO L87 Difference]: Start difference. First operand 99256 states and 146961 transitions. Second operand 3 states. [2020-12-22 09:04:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:54,387 INFO L93 Difference]: Finished difference Result 239564 states and 356570 transitions. [2020-12-22 09:04:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:54,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 09:04:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:54,684 INFO L225 Difference]: With dead ends: 239564 [2020-12-22 09:04:54,684 INFO L226 Difference]: Without dead ends: 160481 [2020-12-22 09:04:54,761 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 09:04:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160481 states. [2020-12-22 09:05:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160481 to 149839. [2020-12-22 09:05:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149839 states. [2020-12-22 09:05:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149839 states to 149839 states and 224212 transitions. [2020-12-22 09:05:07,929 INFO L78 Accepts]: Start accepts. Automaton has 149839 states and 224212 transitions. Word has length 170 [2020-12-22 09:05:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:07,929 INFO L481 AbstractCegarLoop]: Abstraction has 149839 states and 224212 transitions. [2020-12-22 09:05:07,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 149839 states and 224212 transitions. [2020-12-22 09:05:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 09:05:07,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:07,951 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] [2020-12-22 09:05:07,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:05:07,952 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1460936628, now seen corresponding path program 1 times [2020-12-22 09:05:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:07,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818686121] [2020-12-22 09:05:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:08,453 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 09:05:08,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818686121] [2020-12-22 09:05:08,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:08,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928350673] [2020-12-22 09:05:08,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:08,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:08,457 INFO L87 Difference]: Start difference. First operand 149839 states and 224212 transitions. Second operand 4 states. [2020-12-22 09:05:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:18,779 INFO L93 Difference]: Finished difference Result 270255 states and 403932 transitions. [2020-12-22 09:05:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:18,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-12-22 09:05:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:19,141 INFO L225 Difference]: With dead ends: 270255 [2020-12-22 09:05:19,141 INFO L226 Difference]: Without dead ends: 120474 [2020-12-22 09:05:19,255 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 09:05:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120474 states. [2020-12-22 09:05:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120474 to 120474. [2020-12-22 09:05:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120474 states. [2020-12-22 09:05:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120474 states to 120474 states and 179793 transitions. [2020-12-22 09:05:29,615 INFO L78 Accepts]: Start accepts. Automaton has 120474 states and 179793 transitions. Word has length 171 [2020-12-22 09:05:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 120474 states and 179793 transitions. [2020-12-22 09:05:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 120474 states and 179793 transitions. [2020-12-22 09:05:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 09:05:29,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:29,634 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, 1, 1, 1, 1] [2020-12-22 09:05:29,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:05:29,634 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:29,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1811794915, now seen corresponding path program 1 times [2020-12-22 09:05:29,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:29,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593721255] [2020-12-22 09:05:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:30,186 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 09:05:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593721255] [2020-12-22 09:05:30,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:30,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:05:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132259254] [2020-12-22 09:05:30,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:05:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:05:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:05:30,188 INFO L87 Difference]: Start difference. First operand 120474 states and 179793 transitions. Second operand 6 states.