/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:02:53,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:02:53,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:02:54,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:02:54,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:02:54,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:02:54,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:02:54,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:02:54,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:02:54,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:02:54,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:02:54,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:02:54,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:02:54,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:02:54,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:02:54,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:02:54,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:02:54,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:02:54,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:02:54,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:02:54,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:02:54,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:02:54,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:02:54,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:02:54,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:02:54,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:02:54,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:02:54,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:02:54,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:02:54,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:02:54,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:02:54,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:02:54,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:02:54,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:02:54,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:02:54,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:02:54,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:02:54,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:02:54,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:02:54,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:02:54,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:02:54,171 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:02:54,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:02:54,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:02:54,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:02:54,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:02:54,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:02:54,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:02:54,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:02:54,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:02:54,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:02:54,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:02:54,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:02:54,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:02:54,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:02:54,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:02:54,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:02:54,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:02:54,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:02:54,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:02:54,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:02:54,675 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:02:54,676 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:02:54,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:02:54,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d15f09/98adc7dabfdb4bb1ab5142b4172153c5/FLAG763589ee6 [2020-12-22 08:02:55,450 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:02:55,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:02:55,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d15f09/98adc7dabfdb4bb1ab5142b4172153c5/FLAG763589ee6 [2020-12-22 08:02:55,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d1d15f09/98adc7dabfdb4bb1ab5142b4172153c5 [2020-12-22 08:02:55,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:02:55,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:02:55,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:02:55,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:02:55,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:02:55,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:02:55" (1/1) ... [2020-12-22 08:02:55,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ece550f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:55, skipping insertion in model container [2020-12-22 08:02:55,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:02:55" (1/1) ... [2020-12-22 08:02:55,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:02:55,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:02:56,116 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:02:56,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:02:56,215 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:02:56,281 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:02:56,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:02:56,343 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:02:56,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56 WrapperNode [2020-12-22 08:02:56,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:02:56,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:02:56,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:02:56,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:02:56,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:02:56,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:02:56,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:02:56,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:02:56,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... [2020-12-22 08:02:56,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:02:56,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:02:56,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:02:56,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:02:56,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:02:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:02:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:02:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:02:56,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:02:57,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:02:57,497 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:02:57,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:02:57 BoogieIcfgContainer [2020-12-22 08:02:57,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:02:57,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:02:57,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:02:57,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:02:57,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:02:55" (1/3) ... [2020-12-22 08:02:57,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6335b561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:02:57, skipping insertion in model container [2020-12-22 08:02:57,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:56" (2/3) ... [2020-12-22 08:02:57,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6335b561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:02:57, skipping insertion in model container [2020-12-22 08:02:57,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:02:57" (3/3) ... [2020-12-22 08:02:57,512 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:02:57,519 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:02:57,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:02:57,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:02:57,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:02:57,582 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:02:57,582 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:02:57,582 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:02:57,582 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:02:57,583 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:02:57,583 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:02:57,583 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:02:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-12-22 08:02:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:02:57,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:57,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:57,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1933157835, now seen corresponding path program 1 times [2020-12-22 08:02:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:57,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427762659] [2020-12-22 08:02:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:02:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427762659] [2020-12-22 08:02:58,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:58,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:58,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257364719] [2020-12-22 08:02:58,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:58,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:58,175 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-12-22 08:02:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:58,293 INFO L93 Difference]: Finished difference Result 288 states and 491 transitions. [2020-12-22 08:02:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:58,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:02:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:58,321 INFO L225 Difference]: With dead ends: 288 [2020-12-22 08:02:58,323 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 08:02:58,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 08:02:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-12-22 08:02:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 08:02:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 313 transitions. [2020-12-22 08:02:58,410 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 313 transitions. Word has length 57 [2020-12-22 08:02:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 313 transitions. [2020-12-22 08:02:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 313 transitions. [2020-12-22 08:02:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:02:58,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:58,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:58,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:02:58,438 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1883490782, now seen corresponding path program 1 times [2020-12-22 08:02:58,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:58,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742882668] [2020-12-22 08:02:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:02:58,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742882668] [2020-12-22 08:02:58,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:58,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862867943] [2020-12-22 08:02:58,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:58,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:58,638 INFO L87 Difference]: Start difference. First operand 199 states and 313 transitions. Second operand 3 states. [2020-12-22 08:02:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:58,693 INFO L93 Difference]: Finished difference Result 475 states and 769 transitions. [2020-12-22 08:02:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:58,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:02:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:58,704 INFO L225 Difference]: With dead ends: 475 [2020-12-22 08:02:58,705 INFO L226 Difference]: Without dead ends: 330 [2020-12-22 08:02:58,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-22 08:02:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2020-12-22 08:02:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 08:02:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2020-12-22 08:02:58,793 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 59 [2020-12-22 08:02:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:58,793 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2020-12-22 08:02:58,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2020-12-22 08:02:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:02:58,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:58,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:58,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:02:58,803 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash -111872728, now seen corresponding path program 1 times [2020-12-22 08:02:58,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:58,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238640185] [2020-12-22 08:02:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:02:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238640185] [2020-12-22 08:02:58,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:58,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:58,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810851505] [2020-12-22 08:02:58,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:58,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:58,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:58,928 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand 3 states. [2020-12-22 08:02:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:59,004 INFO L93 Difference]: Finished difference Result 603 states and 981 transitions. [2020-12-22 08:02:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:59,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:02:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:59,018 INFO L225 Difference]: With dead ends: 603 [2020-12-22 08:02:59,018 INFO L226 Difference]: Without dead ends: 458 [2020-12-22 08:02:59,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-22 08:02:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-12-22 08:02:59,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-12-22 08:02:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 735 transitions. [2020-12-22 08:02:59,098 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 735 transitions. Word has length 61 [2020-12-22 08:02:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:59,099 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 735 transitions. [2020-12-22 08:02:59,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 735 transitions. [2020-12-22 08:02:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:02:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:59,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:59,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:02:59,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1275396395, now seen corresponding path program 1 times [2020-12-22 08:02:59,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:59,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183518883] [2020-12-22 08:02:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:02:59,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183518883] [2020-12-22 08:02:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981650501] [2020-12-22 08:02:59,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:59,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:59,258 INFO L87 Difference]: Start difference. First operand 456 states and 735 transitions. Second operand 3 states. [2020-12-22 08:02:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:59,336 INFO L93 Difference]: Finished difference Result 1172 states and 1911 transitions. [2020-12-22 08:02:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:59,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:02:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:59,345 INFO L225 Difference]: With dead ends: 1172 [2020-12-22 08:02:59,346 INFO L226 Difference]: Without dead ends: 793 [2020-12-22 08:02:59,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-22 08:02:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 791. [2020-12-22 08:02:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-12-22 08:02:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1277 transitions. [2020-12-22 08:02:59,397 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1277 transitions. Word has length 61 [2020-12-22 08:02:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:59,397 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1277 transitions. [2020-12-22 08:02:59,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1277 transitions. [2020-12-22 08:02:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:02:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:59,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:59,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:02:59,400 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1280827262, now seen corresponding path program 1 times [2020-12-22 08:02:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:59,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056720971] [2020-12-22 08:02:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:02:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056720971] [2020-12-22 08:02:59,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:59,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:02:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406105817] [2020-12-22 08:02:59,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:02:59,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:02:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:59,551 INFO L87 Difference]: Start difference. First operand 791 states and 1277 transitions. Second operand 5 states. [2020-12-22 08:02:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:59,792 INFO L93 Difference]: Finished difference Result 2945 states and 4837 transitions. [2020-12-22 08:02:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:02:59,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:02:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:59,811 INFO L225 Difference]: With dead ends: 2945 [2020-12-22 08:02:59,811 INFO L226 Difference]: Without dead ends: 2231 [2020-12-22 08:02:59,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-12-22 08:02:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1452. [2020-12-22 08:02:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2020-12-22 08:02:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2348 transitions. [2020-12-22 08:02:59,947 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2348 transitions. Word has length 63 [2020-12-22 08:02:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:59,949 INFO L481 AbstractCegarLoop]: Abstraction has 1452 states and 2348 transitions. [2020-12-22 08:02:59,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:02:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2348 transitions. [2020-12-22 08:02:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:02:59,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:59,951 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] [2020-12-22 08:02:59,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:02:59,952 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1113443658, now seen corresponding path program 1 times [2020-12-22 08:02:59,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:59,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713404228] [2020-12-22 08:02:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713404228] [2020-12-22 08:03:00,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:00,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630527700] [2020-12-22 08:03:00,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:00,086 INFO L87 Difference]: Start difference. First operand 1452 states and 2348 transitions. Second operand 4 states. [2020-12-22 08:03:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:00,334 INFO L93 Difference]: Finished difference Result 3856 states and 6322 transitions. [2020-12-22 08:03:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:00,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:03:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:00,349 INFO L225 Difference]: With dead ends: 3856 [2020-12-22 08:03:00,349 INFO L226 Difference]: Without dead ends: 2483 [2020-12-22 08:03:00,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2020-12-22 08:03:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2147. [2020-12-22 08:03:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-12-22 08:03:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3491 transitions. [2020-12-22 08:03:00,515 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3491 transitions. Word has length 64 [2020-12-22 08:03:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:00,516 INFO L481 AbstractCegarLoop]: Abstraction has 2147 states and 3491 transitions. [2020-12-22 08:03:00,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3491 transitions. [2020-12-22 08:03:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:03:00,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:00,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:03:00,521 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1248232611, now seen corresponding path program 1 times [2020-12-22 08:03:00,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:00,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294603760] [2020-12-22 08:03:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:00,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294603760] [2020-12-22 08:03:00,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:00,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280490072] [2020-12-22 08:03:00,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:00,642 INFO L87 Difference]: Start difference. First operand 2147 states and 3491 transitions. Second operand 3 states. [2020-12-22 08:03:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:00,863 INFO L93 Difference]: Finished difference Result 4165 states and 6807 transitions. [2020-12-22 08:03:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:00,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:03:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:00,881 INFO L225 Difference]: With dead ends: 4165 [2020-12-22 08:03:00,881 INFO L226 Difference]: Without dead ends: 3011 [2020-12-22 08:03:00,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:00,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2020-12-22 08:03:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 3009. [2020-12-22 08:03:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-12-22 08:03:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4878 transitions. [2020-12-22 08:03:01,125 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4878 transitions. Word has length 64 [2020-12-22 08:03:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:01,125 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 4878 transitions. [2020-12-22 08:03:01,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4878 transitions. [2020-12-22 08:03:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:03:01,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:01,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:01,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:03:01,128 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 616386787, now seen corresponding path program 1 times [2020-12-22 08:03:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:01,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395206952] [2020-12-22 08:03:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:01,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395206952] [2020-12-22 08:03:01,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:01,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144374365] [2020-12-22 08:03:01,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:01,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:01,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:01,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:01,209 INFO L87 Difference]: Start difference. First operand 3009 states and 4878 transitions. Second operand 3 states. [2020-12-22 08:03:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:01,474 INFO L93 Difference]: Finished difference Result 6431 states and 10590 transitions. [2020-12-22 08:03:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:01,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:03:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:01,499 INFO L225 Difference]: With dead ends: 6431 [2020-12-22 08:03:01,499 INFO L226 Difference]: Without dead ends: 4345 [2020-12-22 08:03:01,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2020-12-22 08:03:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 4343. [2020-12-22 08:03:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4343 states. [2020-12-22 08:03:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 7079 transitions. [2020-12-22 08:03:01,800 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 7079 transitions. Word has length 64 [2020-12-22 08:03:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:01,800 INFO L481 AbstractCegarLoop]: Abstraction has 4343 states and 7079 transitions. [2020-12-22 08:03:01,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 7079 transitions. [2020-12-22 08:03:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:01,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:01,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:01,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:03:01,808 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -214961207, now seen corresponding path program 1 times [2020-12-22 08:03:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:01,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961997332] [2020-12-22 08:03:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:01,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961997332] [2020-12-22 08:03:01,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:01,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:01,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350707723] [2020-12-22 08:03:01,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:01,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:01,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:01,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:01,908 INFO L87 Difference]: Start difference. First operand 4343 states and 7079 transitions. Second operand 4 states. [2020-12-22 08:03:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:02,394 INFO L93 Difference]: Finished difference Result 12351 states and 20249 transitions. [2020-12-22 08:03:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:02,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:03:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:02,439 INFO L225 Difference]: With dead ends: 12351 [2020-12-22 08:03:02,439 INFO L226 Difference]: Without dead ends: 8090 [2020-12-22 08:03:02,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2020-12-22 08:03:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 6911. [2020-12-22 08:03:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6911 states. [2020-12-22 08:03:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6911 states to 6911 states and 11221 transitions. [2020-12-22 08:03:02,987 INFO L78 Accepts]: Start accepts. Automaton has 6911 states and 11221 transitions. Word has length 65 [2020-12-22 08:03:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:02,987 INFO L481 AbstractCegarLoop]: Abstraction has 6911 states and 11221 transitions. [2020-12-22 08:03:02,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6911 states and 11221 transitions. [2020-12-22 08:03:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:03:02,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:02,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:02,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:03:02,989 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1872749021, now seen corresponding path program 1 times [2020-12-22 08:03:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:02,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947124019] [2020-12-22 08:03:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:03,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947124019] [2020-12-22 08:03:03,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:03,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775562618] [2020-12-22 08:03:03,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:03,154 INFO L87 Difference]: Start difference. First operand 6911 states and 11221 transitions. Second operand 4 states. [2020-12-22 08:03:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:03,953 INFO L93 Difference]: Finished difference Result 20038 states and 32688 transitions. [2020-12-22 08:03:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:03,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 08:03:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:04,026 INFO L225 Difference]: With dead ends: 20038 [2020-12-22 08:03:04,027 INFO L226 Difference]: Without dead ends: 13209 [2020-12-22 08:03:04,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13209 states. [2020-12-22 08:03:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13209 to 10779. [2020-12-22 08:03:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:03:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17427 transitions. [2020-12-22 08:03:04,832 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17427 transitions. Word has length 66 [2020-12-22 08:03:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:04,832 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17427 transitions. [2020-12-22 08:03:04,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17427 transitions. [2020-12-22 08:03:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:03:04,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:04,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:04,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:03:04,834 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1396799506, now seen corresponding path program 1 times [2020-12-22 08:03:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:04,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292684032] [2020-12-22 08:03:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:05,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292684032] [2020-12-22 08:03:05,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:05,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620782292] [2020-12-22 08:03:05,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:05,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:05,011 INFO L87 Difference]: Start difference. First operand 10779 states and 17427 transitions. Second operand 5 states. [2020-12-22 08:03:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:06,307 INFO L93 Difference]: Finished difference Result 25359 states and 41228 transitions. [2020-12-22 08:03:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:03:06,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:03:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:06,349 INFO L225 Difference]: With dead ends: 25359 [2020-12-22 08:03:06,349 INFO L226 Difference]: Without dead ends: 14662 [2020-12-22 08:03:06,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14662 states. [2020-12-22 08:03:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14662 to 10779. [2020-12-22 08:03:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10779 states. [2020-12-22 08:03:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 17302 transitions. [2020-12-22 08:03:07,091 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 17302 transitions. Word has length 68 [2020-12-22 08:03:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:07,092 INFO L481 AbstractCegarLoop]: Abstraction has 10779 states and 17302 transitions. [2020-12-22 08:03:07,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 17302 transitions. [2020-12-22 08:03:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:03:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:07,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:07,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:03:07,093 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -164512453, now seen corresponding path program 1 times [2020-12-22 08:03:07,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:07,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614666866] [2020-12-22 08:03:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614666866] [2020-12-22 08:03:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:07,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473948884] [2020-12-22 08:03:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:07,205 INFO L87 Difference]: Start difference. First operand 10779 states and 17302 transitions. Second operand 4 states. [2020-12-22 08:03:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:08,457 INFO L93 Difference]: Finished difference Result 31699 states and 50901 transitions. [2020-12-22 08:03:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:08,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 08:03:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:08,519 INFO L225 Difference]: With dead ends: 31699 [2020-12-22 08:03:08,519 INFO L226 Difference]: Without dead ends: 20929 [2020-12-22 08:03:08,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20929 states. [2020-12-22 08:03:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20929 to 20927. [2020-12-22 08:03:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20927 states. [2020-12-22 08:03:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20927 states to 20927 states and 33387 transitions. [2020-12-22 08:03:09,875 INFO L78 Accepts]: Start accepts. Automaton has 20927 states and 33387 transitions. Word has length 71 [2020-12-22 08:03:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:09,875 INFO L481 AbstractCegarLoop]: Abstraction has 20927 states and 33387 transitions. [2020-12-22 08:03:09,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20927 states and 33387 transitions. [2020-12-22 08:03:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:03:09,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:09,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:09,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:03:09,877 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 667892135, now seen corresponding path program 1 times [2020-12-22 08:03:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818810618] [2020-12-22 08:03:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818810618] [2020-12-22 08:03:09,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:09,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241255573] [2020-12-22 08:03:09,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:09,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:09,916 INFO L87 Difference]: Start difference. First operand 20927 states and 33387 transitions. Second operand 3 states. [2020-12-22 08:03:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:12,623 INFO L93 Difference]: Finished difference Result 62743 states and 100099 transitions. [2020-12-22 08:03:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:12,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:03:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:12,752 INFO L225 Difference]: With dead ends: 62743 [2020-12-22 08:03:12,752 INFO L226 Difference]: Without dead ends: 41844 [2020-12-22 08:03:12,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41844 states. [2020-12-22 08:03:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41844 to 20929. [2020-12-22 08:03:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20929 states. [2020-12-22 08:03:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 33389 transitions. [2020-12-22 08:03:14,822 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 33389 transitions. Word has length 72 [2020-12-22 08:03:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:14,823 INFO L481 AbstractCegarLoop]: Abstraction has 20929 states and 33389 transitions. [2020-12-22 08:03:14,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 33389 transitions. [2020-12-22 08:03:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:03:14,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:14,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:14,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:03:14,824 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -808520295, now seen corresponding path program 1 times [2020-12-22 08:03:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:14,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355079412] [2020-12-22 08:03:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:14,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355079412] [2020-12-22 08:03:14,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:14,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:14,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61516824] [2020-12-22 08:03:14,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:14,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:14,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:14,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:14,908 INFO L87 Difference]: Start difference. First operand 20929 states and 33389 transitions. Second operand 3 states. [2020-12-22 08:03:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:17,637 INFO L93 Difference]: Finished difference Result 61383 states and 97998 transitions. [2020-12-22 08:03:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:17,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:03:17,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:17,713 INFO L225 Difference]: With dead ends: 61383 [2020-12-22 08:03:17,714 INFO L226 Difference]: Without dead ends: 40610 [2020-12-22 08:03:17,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2020-12-22 08:03:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 40608. [2020-12-22 08:03:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40608 states. [2020-12-22 08:03:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40608 states to 40608 states and 64369 transitions. [2020-12-22 08:03:20,700 INFO L78 Accepts]: Start accepts. Automaton has 40608 states and 64369 transitions. Word has length 73 [2020-12-22 08:03:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:20,700 INFO L481 AbstractCegarLoop]: Abstraction has 40608 states and 64369 transitions. [2020-12-22 08:03:20,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 40608 states and 64369 transitions. [2020-12-22 08:03:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:03:20,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:20,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:20,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:03:20,703 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1547459556, now seen corresponding path program 1 times [2020-12-22 08:03:20,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:20,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053843987] [2020-12-22 08:03:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053843987] [2020-12-22 08:03:20,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:20,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:20,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143503766] [2020-12-22 08:03:20,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:20,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:20,824 INFO L87 Difference]: Start difference. First operand 40608 states and 64369 transitions. Second operand 5 states. [2020-12-22 08:03:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:26,199 INFO L93 Difference]: Finished difference Result 119148 states and 188934 transitions. [2020-12-22 08:03:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:26,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 08:03:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:26,360 INFO L225 Difference]: With dead ends: 119148 [2020-12-22 08:03:26,360 INFO L226 Difference]: Without dead ends: 78554 [2020-12-22 08:03:26,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78554 states. [2020-12-22 08:03:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78554 to 78552. [2020-12-22 08:03:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78552 states. [2020-12-22 08:03:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78552 states to 78552 states and 123683 transitions. [2020-12-22 08:03:32,056 INFO L78 Accepts]: Start accepts. Automaton has 78552 states and 123683 transitions. Word has length 73 [2020-12-22 08:03:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:32,056 INFO L481 AbstractCegarLoop]: Abstraction has 78552 states and 123683 transitions. [2020-12-22 08:03:32,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:03:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 78552 states and 123683 transitions. [2020-12-22 08:03:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:03:32,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:32,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:32,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:03:32,060 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1975872346, now seen corresponding path program 1 times [2020-12-22 08:03:32,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:32,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567797504] [2020-12-22 08:03:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:32,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567797504] [2020-12-22 08:03:32,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:32,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:03:32,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273695670] [2020-12-22 08:03:32,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:03:32,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:32,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:03:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:03:32,166 INFO L87 Difference]: Start difference. First operand 78552 states and 123683 transitions. Second operand 4 states. [2020-12-22 08:03:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:42,970 INFO L93 Difference]: Finished difference Result 230583 states and 363068 transitions. [2020-12-22 08:03:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:42,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 08:03:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:43,414 INFO L225 Difference]: With dead ends: 230583 [2020-12-22 08:03:43,414 INFO L226 Difference]: Without dead ends: 152087 [2020-12-22 08:03:43,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152087 states. [2020-12-22 08:03:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152087 to 152085. [2020-12-22 08:03:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152085 states. [2020-12-22 08:03:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152085 states to 152085 states and 237673 transitions. [2020-12-22 08:03:55,605 INFO L78 Accepts]: Start accepts. Automaton has 152085 states and 237673 transitions. Word has length 73 [2020-12-22 08:03:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:55,605 INFO L481 AbstractCegarLoop]: Abstraction has 152085 states and 237673 transitions. [2020-12-22 08:03:55,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 152085 states and 237673 transitions. [2020-12-22 08:03:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:03:55,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:55,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:55,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:03:55,631 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2004902810, now seen corresponding path program 1 times [2020-12-22 08:03:55,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530871149] [2020-12-22 08:03:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:03:55,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530871149] [2020-12-22 08:03:55,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:55,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433747113] [2020-12-22 08:03:55,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:55,686 INFO L87 Difference]: Start difference. First operand 152085 states and 237673 transitions. Second operand 3 states. [2020-12-22 08:04:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:17,553 INFO L93 Difference]: Finished difference Result 456103 states and 712786 transitions. [2020-12-22 08:04:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:17,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:04:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:18,430 INFO L225 Difference]: With dead ends: 456103 [2020-12-22 08:04:18,431 INFO L226 Difference]: Without dead ends: 304109 [2020-12-22 08:04:18,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304109 states. [2020-12-22 08:04:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304109 to 152095. [2020-12-22 08:04:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152095 states. [2020-12-22 08:04:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152095 states to 152095 states and 237683 transitions. [2020-12-22 08:04:32,461 INFO L78 Accepts]: Start accepts. Automaton has 152095 states and 237683 transitions. Word has length 74 [2020-12-22 08:04:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:32,461 INFO L481 AbstractCegarLoop]: Abstraction has 152095 states and 237683 transitions. [2020-12-22 08:04:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 152095 states and 237683 transitions. [2020-12-22 08:04:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:04:32,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:32,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:04:32,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:04:32,465 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997191, now seen corresponding path program 1 times [2020-12-22 08:04:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:32,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613595150] [2020-12-22 08:04:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:04:32,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613595150] [2020-12-22 08:04:32,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:32,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000247955] [2020-12-22 08:04:32,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:32,582 INFO L87 Difference]: Start difference. First operand 152095 states and 237683 transitions. Second operand 4 states. [2020-12-22 08:04:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:57,139 INFO L93 Difference]: Finished difference Result 446123 states and 697112 transitions. [2020-12-22 08:04:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:57,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 08:04:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:58,045 INFO L225 Difference]: With dead ends: 446123 [2020-12-22 08:04:58,045 INFO L226 Difference]: Without dead ends: 294129 [2020-12-22 08:04:58,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:58,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294129 states.