/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_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:23:59,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:23:59,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:23:59,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:23:59,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:23:59,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:23:59,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:23:59,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:23:59,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:23:59,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:23:59,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:23:59,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:23:59,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:23:59,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:23:59,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:23:59,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:23:59,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:23:59,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:23:59,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:23:59,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:23:59,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:23:59,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:23:59,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:23:59,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:23:59,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:23:59,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:23:59,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:23:59,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:23:59,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:23:59,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:23:59,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:23:59,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:23:59,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:23:59,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:23:59,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:23:59,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:23:59,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:23:59,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:23:59,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:23:59,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:23:59,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:23:59,222 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:23:59,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:23:59,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:23:59,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:23:59,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:23:59,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:23:59,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:23:59,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:23:59,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:23:59,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:23:59,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:23:59,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:23:59,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:23:59,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:23:59,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:23:59,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:23:59,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:23:59,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:23:59,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:23:59,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:23:59,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:23:59,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:23:59,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:23:59,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:23:59,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:23:59,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:23:59,735 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:23:59,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:23:59,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e87016d59/091cfe69b24c4061ba69a9f67e9eb682/FLAG34b6a4389 [2020-12-22 08:24:00,476 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:24:00,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:24:00,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e87016d59/091cfe69b24c4061ba69a9f67e9eb682/FLAG34b6a4389 [2020-12-22 08:24:00,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e87016d59/091cfe69b24c4061ba69a9f67e9eb682 [2020-12-22 08:24:00,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:24:00,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:24:00,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:00,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:24:00,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:24:00,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:00" (1/1) ... [2020-12-22 08:24:00,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2a1e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:00, skipping insertion in model container [2020-12-22 08:24:00,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:00" (1/1) ... [2020-12-22 08:24:00,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:24:00,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:24:01,099 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_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4973,4986] [2020-12-22 08:24:01,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:01,200 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:24:01,295 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_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4973,4986] [2020-12-22 08:24:01,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:01,380 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:24:01,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01 WrapperNode [2020-12-22 08:24:01,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:01,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:01,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:24:01,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:24:01,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:01,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:24:01,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:24:01,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:24:01,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (1/1) ... [2020-12-22 08:24:01,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:24:01,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:24:01,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:24:01,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:24:01,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (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 08:24:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:24:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:24:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:24:01,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:24:02,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:24:02,664 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:24:02,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:02 BoogieIcfgContainer [2020-12-22 08:24:02,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:24:02,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:24:02,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:24:02,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:24:02,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:24:00" (1/3) ... [2020-12-22 08:24:02,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610936e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:02, skipping insertion in model container [2020-12-22 08:24:02,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:01" (2/3) ... [2020-12-22 08:24:02,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610936e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:02, skipping insertion in model container [2020-12-22 08:24:02,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:02" (3/3) ... [2020-12-22 08:24:02,677 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:24:02,684 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:24:02,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:24:02,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:24:02,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:24:02,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:24:02,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:24:02,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:24:02,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:24:02,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:24:02,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:24:02,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:24:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-12-22 08:24:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:24:02,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:02,770 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] [2020-12-22 08:24:02,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -656787439, now seen corresponding path program 1 times [2020-12-22 08:24:02,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:02,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521862273] [2020-12-22 08:24:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:03,264 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 08:24:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521862273] [2020-12-22 08:24:03,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:03,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800981793] [2020-12-22 08:24:03,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:03,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:03,300 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 3 states. [2020-12-22 08:24:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:03,457 INFO L93 Difference]: Finished difference Result 251 states and 401 transitions. [2020-12-22 08:24:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:03,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:24:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:03,495 INFO L225 Difference]: With dead ends: 251 [2020-12-22 08:24:03,496 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 08:24:03,500 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 08:24:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 08:24:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-12-22 08:24:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-22 08:24:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 243 transitions. [2020-12-22 08:24:03,594 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 243 transitions. Word has length 48 [2020-12-22 08:24:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 243 transitions. [2020-12-22 08:24:03,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 243 transitions. [2020-12-22 08:24:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:24:03,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:03,599 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] [2020-12-22 08:24:03,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:24:03,601 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1525314343, now seen corresponding path program 1 times [2020-12-22 08:24:03,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:03,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991778184] [2020-12-22 08:24:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:03,805 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 08:24:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991778184] [2020-12-22 08:24:03,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025650701] [2020-12-22 08:24:03,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:03,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:03,810 INFO L87 Difference]: Start difference. First operand 163 states and 243 transitions. Second operand 3 states. [2020-12-22 08:24:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:03,861 INFO L93 Difference]: Finished difference Result 403 states and 623 transitions. [2020-12-22 08:24:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:03,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:24:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:03,865 INFO L225 Difference]: With dead ends: 403 [2020-12-22 08:24:03,865 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 08:24:03,870 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 08:24:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 08:24:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2020-12-22 08:24:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 08:24:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 404 transitions. [2020-12-22 08:24:03,912 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 404 transitions. Word has length 49 [2020-12-22 08:24:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:03,913 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 404 transitions. [2020-12-22 08:24:03,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 404 transitions. [2020-12-22 08:24:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:24:03,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:03,916 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] [2020-12-22 08:24:03,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:24:03,916 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1721693138, now seen corresponding path program 1 times [2020-12-22 08:24:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:03,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711447752] [2020-12-22 08:24:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:04,053 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 08:24:04,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711447752] [2020-12-22 08:24:04,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:04,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:04,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777667317] [2020-12-22 08:24:04,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:04,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:04,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:04,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:04,058 INFO L87 Difference]: Start difference. First operand 265 states and 404 transitions. Second operand 3 states. [2020-12-22 08:24:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:04,144 INFO L93 Difference]: Finished difference Result 677 states and 1054 transitions. [2020-12-22 08:24:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:04,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:24:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:04,148 INFO L225 Difference]: With dead ends: 677 [2020-12-22 08:24:04,149 INFO L226 Difference]: Without dead ends: 439 [2020-12-22 08:24:04,151 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 08:24:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-22 08:24:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2020-12-22 08:24:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-22 08:24:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 672 transitions. [2020-12-22 08:24:04,198 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 672 transitions. Word has length 50 [2020-12-22 08:24:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:04,199 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 672 transitions. [2020-12-22 08:24:04,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 672 transitions. [2020-12-22 08:24:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:24:04,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:04,201 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] [2020-12-22 08:24:04,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:24:04,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2073243904, now seen corresponding path program 1 times [2020-12-22 08:24:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271130578] [2020-12-22 08:24:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:04,400 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 08:24:04,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271130578] [2020-12-22 08:24:04,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:04,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916715319] [2020-12-22 08:24:04,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:04,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:04,405 INFO L87 Difference]: Start difference. First operand 437 states and 672 transitions. Second operand 6 states. [2020-12-22 08:24:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:04,683 INFO L93 Difference]: Finished difference Result 1873 states and 2916 transitions. [2020-12-22 08:24:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:04,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 08:24:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:04,693 INFO L225 Difference]: With dead ends: 1873 [2020-12-22 08:24:04,694 INFO L226 Difference]: Without dead ends: 1463 [2020-12-22 08:24:04,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2020-12-22 08:24:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1457. [2020-12-22 08:24:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1457 states. [2020-12-22 08:24:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2260 transitions. [2020-12-22 08:24:04,837 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2260 transitions. Word has length 51 [2020-12-22 08:24:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:04,837 INFO L481 AbstractCegarLoop]: Abstraction has 1457 states and 2260 transitions. [2020-12-22 08:24:04,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2260 transitions. [2020-12-22 08:24:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:24:04,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:04,840 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] [2020-12-22 08:24:04,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:24:04,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1744489678, now seen corresponding path program 1 times [2020-12-22 08:24:04,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:04,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134191842] [2020-12-22 08:24:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:04,902 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 08:24:04,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134191842] [2020-12-22 08:24:04,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:04,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596318504] [2020-12-22 08:24:04,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:04,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:04,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:04,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:04,906 INFO L87 Difference]: Start difference. First operand 1457 states and 2260 transitions. Second operand 3 states. [2020-12-22 08:24:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:05,137 INFO L93 Difference]: Finished difference Result 3901 states and 6054 transitions. [2020-12-22 08:24:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:05,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:24:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:05,156 INFO L225 Difference]: With dead ends: 3901 [2020-12-22 08:24:05,156 INFO L226 Difference]: Without dead ends: 2471 [2020-12-22 08:24:05,159 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 08:24:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2020-12-22 08:24:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2469. [2020-12-22 08:24:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2020-12-22 08:24:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3788 transitions. [2020-12-22 08:24:05,382 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3788 transitions. Word has length 53 [2020-12-22 08:24:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:05,382 INFO L481 AbstractCegarLoop]: Abstraction has 2469 states and 3788 transitions. [2020-12-22 08:24:05,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3788 transitions. [2020-12-22 08:24:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:24:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:05,386 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] [2020-12-22 08:24:05,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:24:05,386 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 333389623, now seen corresponding path program 1 times [2020-12-22 08:24:05,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:05,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534379933] [2020-12-22 08:24:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:05,547 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 08:24:05,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534379933] [2020-12-22 08:24:05,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:05,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:05,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069285751] [2020-12-22 08:24:05,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:05,552 INFO L87 Difference]: Start difference. First operand 2469 states and 3788 transitions. Second operand 6 states. [2020-12-22 08:24:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:06,436 INFO L93 Difference]: Finished difference Result 9627 states and 14783 transitions. [2020-12-22 08:24:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:06,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:24:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:06,478 INFO L225 Difference]: With dead ends: 9627 [2020-12-22 08:24:06,478 INFO L226 Difference]: Without dead ends: 7185 [2020-12-22 08:24:06,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2020-12-22 08:24:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 7181. [2020-12-22 08:24:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7181 states. [2020-12-22 08:24:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 10972 transitions. [2020-12-22 08:24:07,066 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 10972 transitions. Word has length 53 [2020-12-22 08:24:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:07,066 INFO L481 AbstractCegarLoop]: Abstraction has 7181 states and 10972 transitions. [2020-12-22 08:24:07,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:07,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 10972 transitions. [2020-12-22 08:24:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:24:07,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:07,067 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] [2020-12-22 08:24:07,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:24:07,068 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2108233586, now seen corresponding path program 1 times [2020-12-22 08:24:07,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:07,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170021961] [2020-12-22 08:24:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:07,210 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 08:24:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170021961] [2020-12-22 08:24:07,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:07,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:07,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819450190] [2020-12-22 08:24:07,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:07,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:07,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:07,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:07,214 INFO L87 Difference]: Start difference. First operand 7181 states and 10972 transitions. Second operand 6 states. [2020-12-22 08:24:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:08,979 INFO L93 Difference]: Finished difference Result 32719 states and 50025 transitions. [2020-12-22 08:24:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:08,981 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:24:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:09,119 INFO L225 Difference]: With dead ends: 32719 [2020-12-22 08:24:09,120 INFO L226 Difference]: Without dead ends: 25565 [2020-12-22 08:24:09,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25565 states. [2020-12-22 08:24:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25565 to 14333. [2020-12-22 08:24:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14333 states. [2020-12-22 08:24:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14333 states to 14333 states and 21532 transitions. [2020-12-22 08:24:10,528 INFO L78 Accepts]: Start accepts. Automaton has 14333 states and 21532 transitions. Word has length 53 [2020-12-22 08:24:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:10,529 INFO L481 AbstractCegarLoop]: Abstraction has 14333 states and 21532 transitions. [2020-12-22 08:24:10,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14333 states and 21532 transitions. [2020-12-22 08:24:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:24:10,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:10,531 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] [2020-12-22 08:24:10,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:24:10,532 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash 911275449, now seen corresponding path program 1 times [2020-12-22 08:24:10,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:10,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111807506] [2020-12-22 08:24:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:10,675 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 08:24:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111807506] [2020-12-22 08:24:10,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:10,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595332491] [2020-12-22 08:24:10,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:10,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:10,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:10,679 INFO L87 Difference]: Start difference. First operand 14333 states and 21532 transitions. Second operand 5 states. [2020-12-22 08:24:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:12,470 INFO L93 Difference]: Finished difference Result 29407 states and 43805 transitions. [2020-12-22 08:24:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:12,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:24:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:12,544 INFO L225 Difference]: With dead ends: 29407 [2020-12-22 08:24:12,544 INFO L226 Difference]: Without dead ends: 29405 [2020-12-22 08:24:12,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29405 states. [2020-12-22 08:24:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29405 to 15101. [2020-12-22 08:24:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15101 states. [2020-12-22 08:24:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15101 states to 15101 states and 22300 transitions. [2020-12-22 08:24:13,641 INFO L78 Accepts]: Start accepts. Automaton has 15101 states and 22300 transitions. Word has length 54 [2020-12-22 08:24:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:13,642 INFO L481 AbstractCegarLoop]: Abstraction has 15101 states and 22300 transitions. [2020-12-22 08:24:13,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:24:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 15101 states and 22300 transitions. [2020-12-22 08:24:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:24:13,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:13,643 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] [2020-12-22 08:24:13,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:24:13,644 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:13,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1804659102, now seen corresponding path program 1 times [2020-12-22 08:24:13,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:13,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401142127] [2020-12-22 08:24:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:13,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401142127] [2020-12-22 08:24:13,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:13,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406918895] [2020-12-22 08:24:13,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:13,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:13,705 INFO L87 Difference]: Start difference. First operand 15101 states and 22300 transitions. Second operand 3 states. [2020-12-22 08:24:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:15,196 INFO L93 Difference]: Finished difference Result 36727 states and 54200 transitions. [2020-12-22 08:24:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:15,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 08:24:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:15,256 INFO L225 Difference]: With dead ends: 36727 [2020-12-22 08:24:15,256 INFO L226 Difference]: Without dead ends: 21653 [2020-12-22 08:24:15,279 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 08:24:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21653 states. [2020-12-22 08:24:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21653 to 21483. [2020-12-22 08:24:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21483 states. [2020-12-22 08:24:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21483 states to 21483 states and 31422 transitions. [2020-12-22 08:24:16,878 INFO L78 Accepts]: Start accepts. Automaton has 21483 states and 31422 transitions. Word has length 55 [2020-12-22 08:24:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:16,878 INFO L481 AbstractCegarLoop]: Abstraction has 21483 states and 31422 transitions. [2020-12-22 08:24:16,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 21483 states and 31422 transitions. [2020-12-22 08:24:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:16,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:16,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:16,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:24:16,888 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:16,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1080794896, now seen corresponding path program 1 times [2020-12-22 08:24:16,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:16,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785537825] [2020-12-22 08:24:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:16,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785537825] [2020-12-22 08:24:16,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:16,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:16,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23075761] [2020-12-22 08:24:16,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:16,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:16,963 INFO L87 Difference]: Start difference. First operand 21483 states and 31422 transitions. Second operand 3 states. [2020-12-22 08:24:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:18,484 INFO L93 Difference]: Finished difference Result 40897 states and 59696 transitions. [2020-12-22 08:24:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:18,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:24:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:18,552 INFO L225 Difference]: With dead ends: 40897 [2020-12-22 08:24:18,553 INFO L226 Difference]: Without dead ends: 29135 [2020-12-22 08:24:18,575 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 08:24:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29135 states. [2020-12-22 08:24:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29135 to 27465. [2020-12-22 08:24:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27465 states. [2020-12-22 08:24:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27465 states to 27465 states and 39634 transitions. [2020-12-22 08:24:21,017 INFO L78 Accepts]: Start accepts. Automaton has 27465 states and 39634 transitions. Word has length 77 [2020-12-22 08:24:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:21,018 INFO L481 AbstractCegarLoop]: Abstraction has 27465 states and 39634 transitions. [2020-12-22 08:24:21,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27465 states and 39634 transitions. [2020-12-22 08:24:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:21,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:21,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:21,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:24:21,026 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:21,027 INFO L82 PathProgramCache]: Analyzing trace with hash -795887881, now seen corresponding path program 1 times [2020-12-22 08:24:21,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:21,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269643939] [2020-12-22 08:24:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:21,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269643939] [2020-12-22 08:24:21,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:21,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:21,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979537108] [2020-12-22 08:24:21,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:21,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:21,085 INFO L87 Difference]: Start difference. First operand 27465 states and 39634 transitions. Second operand 3 states. [2020-12-22 08:24:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:22,871 INFO L93 Difference]: Finished difference Result 42858 states and 61547 transitions. [2020-12-22 08:24:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:22,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:24:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:22,932 INFO L225 Difference]: With dead ends: 42858 [2020-12-22 08:24:22,932 INFO L226 Difference]: Without dead ends: 29055 [2020-12-22 08:24:22,956 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 08:24:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2020-12-22 08:24:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 27740. [2020-12-22 08:24:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27740 states. [2020-12-22 08:24:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27740 states to 27740 states and 39387 transitions. [2020-12-22 08:24:25,208 INFO L78 Accepts]: Start accepts. Automaton has 27740 states and 39387 transitions. Word has length 77 [2020-12-22 08:24:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:25,209 INFO L481 AbstractCegarLoop]: Abstraction has 27740 states and 39387 transitions. [2020-12-22 08:24:25,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27740 states and 39387 transitions. [2020-12-22 08:24:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:25,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:25,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:25,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:24:25,220 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash 129285715, now seen corresponding path program 1 times [2020-12-22 08:24:25,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:25,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318471046] [2020-12-22 08:24:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:24:25,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318471046] [2020-12-22 08:24:25,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523113600] [2020-12-22 08:24:25,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:25,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:25,336 INFO L87 Difference]: Start difference. First operand 27740 states and 39387 transitions. Second operand 6 states. [2020-12-22 08:24:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:28,868 INFO L93 Difference]: Finished difference Result 61614 states and 88642 transitions. [2020-12-22 08:24:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:28,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:24:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:28,938 INFO L225 Difference]: With dead ends: 61614 [2020-12-22 08:24:28,939 INFO L226 Difference]: Without dead ends: 49743 [2020-12-22 08:24:28,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:24:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49743 states. [2020-12-22 08:24:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49743 to 37975. [2020-12-22 08:24:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37975 states. [2020-12-22 08:24:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37975 states to 37975 states and 53950 transitions. [2020-12-22 08:24:31,892 INFO L78 Accepts]: Start accepts. Automaton has 37975 states and 53950 transitions. Word has length 77 [2020-12-22 08:24:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:31,893 INFO L481 AbstractCegarLoop]: Abstraction has 37975 states and 53950 transitions. [2020-12-22 08:24:31,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 37975 states and 53950 transitions. [2020-12-22 08:24:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:31,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:31,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:31,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:24:31,903 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -938810521, now seen corresponding path program 1 times [2020-12-22 08:24:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:31,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75005181] [2020-12-22 08:24:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:24:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75005181] [2020-12-22 08:24:32,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:32,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:24:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659866302] [2020-12-22 08:24:32,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:32,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:32,029 INFO L87 Difference]: Start difference. First operand 37975 states and 53950 transitions. Second operand 5 states. [2020-12-22 08:24:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:36,928 INFO L93 Difference]: Finished difference Result 96694 states and 137083 transitions. [2020-12-22 08:24:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:36,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 08:24:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:37,001 INFO L225 Difference]: With dead ends: 96694 [2020-12-22 08:24:37,001 INFO L226 Difference]: Without dead ends: 58795 [2020-12-22 08:24:37,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58795 states. [2020-12-22 08:24:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58795 to 58493. [2020-12-22 08:24:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58493 states. [2020-12-22 08:24:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58493 states to 58493 states and 82438 transitions. [2020-12-22 08:24:41,728 INFO L78 Accepts]: Start accepts. Automaton has 58493 states and 82438 transitions. Word has length 77 [2020-12-22 08:24:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:41,728 INFO L481 AbstractCegarLoop]: Abstraction has 58493 states and 82438 transitions. [2020-12-22 08:24:41,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:24:41,729 INFO L276 IsEmpty]: Start isEmpty. Operand 58493 states and 82438 transitions. [2020-12-22 08:24:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:41,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:41,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:41,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:24:41,739 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 966415180, now seen corresponding path program 1 times [2020-12-22 08:24:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:41,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448882966] [2020-12-22 08:24:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:24:41,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448882966] [2020-12-22 08:24:41,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:41,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773926438] [2020-12-22 08:24:41,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:41,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:41,853 INFO L87 Difference]: Start difference. First operand 58493 states and 82438 transitions. Second operand 6 states. [2020-12-22 08:24:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:48,656 INFO L93 Difference]: Finished difference Result 102019 states and 145344 transitions. [2020-12-22 08:24:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:48,657 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:24:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:48,774 INFO L225 Difference]: With dead ends: 102019 [2020-12-22 08:24:48,774 INFO L226 Difference]: Without dead ends: 90550 [2020-12-22 08:24:48,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90550 states. [2020-12-22 08:24:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90550 to 69725. [2020-12-22 08:24:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69725 states. [2020-12-22 08:24:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69725 states to 69725 states and 98350 transitions. [2020-12-22 08:24:54,603 INFO L78 Accepts]: Start accepts. Automaton has 69725 states and 98350 transitions. Word has length 77 [2020-12-22 08:24:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:54,604 INFO L481 AbstractCegarLoop]: Abstraction has 69725 states and 98350 transitions. [2020-12-22 08:24:54,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 69725 states and 98350 transitions. [2020-12-22 08:24:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:24:54,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:54,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:54,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:24:54,615 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:54,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1183325764, now seen corresponding path program 1 times [2020-12-22 08:24:54,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:54,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373249759] [2020-12-22 08:24:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:24:54,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373249759] [2020-12-22 08:24:54,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:54,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412826127] [2020-12-22 08:24:54,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:54,719 INFO L87 Difference]: Start difference. First operand 69725 states and 98350 transitions. Second operand 6 states. [2020-12-22 08:25:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:08,973 INFO L93 Difference]: Finished difference Result 241856 states and 340111 transitions. [2020-12-22 08:25:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:08,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:25:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:09,416 INFO L225 Difference]: With dead ends: 241856 [2020-12-22 08:25:09,416 INFO L226 Difference]: Without dead ends: 172225 [2020-12-22 08:25:09,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172225 states. [2020-12-22 08:25:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172225 to 168929. [2020-12-22 08:25:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168929 states. [2020-12-22 08:25:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168929 states to 168929 states and 236826 transitions. [2020-12-22 08:25:23,751 INFO L78 Accepts]: Start accepts. Automaton has 168929 states and 236826 transitions. Word has length 77 [2020-12-22 08:25:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:23,751 INFO L481 AbstractCegarLoop]: Abstraction has 168929 states and 236826 transitions. [2020-12-22 08:25:23,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 168929 states and 236826 transitions. [2020-12-22 08:25:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:25:23,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:23,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:25:23,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:25:23,764 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 335632055, now seen corresponding path program 1 times [2020-12-22 08:25:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:23,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145664373] [2020-12-22 08:25:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 08:25:23,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145664373] [2020-12-22 08:25:23,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:23,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:23,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808502840] [2020-12-22 08:25:23,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:23,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:23,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:23,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:23,887 INFO L87 Difference]: Start difference. First operand 168929 states and 236826 transitions. Second operand 6 states. [2020-12-22 08:25:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:41,635 INFO L93 Difference]: Finished difference Result 248516 states and 351281 transitions. [2020-12-22 08:25:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:41,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:25:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:42,198 INFO L225 Difference]: With dead ends: 248516 [2020-12-22 08:25:42,199 INFO L226 Difference]: Without dead ends: 231486 [2020-12-22 08:25:42,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:25:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231486 states. [2020-12-22 08:25:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231486 to 185669. [2020-12-22 08:25:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185669 states. [2020-12-22 08:25:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185669 states to 185669 states and 260406 transitions. [2020-12-22 08:25:57,906 INFO L78 Accepts]: Start accepts. Automaton has 185669 states and 260406 transitions. Word has length 77 [2020-12-22 08:25:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:57,906 INFO L481 AbstractCegarLoop]: Abstraction has 185669 states and 260406 transitions. [2020-12-22 08:25:57,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 185669 states and 260406 transitions. [2020-12-22 08:25:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:58,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:58,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:25:58,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:25:58,231 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1064257775, now seen corresponding path program 1 times [2020-12-22 08:25:58,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:58,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930430907] [2020-12-22 08:25:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:58,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930430907] [2020-12-22 08:25:58,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942210685] [2020-12-22 08:25:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:25:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:25:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:25:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:25:59,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:25:59,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:25:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720889524] [2020-12-22 08:25:59,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:25:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:25:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:25:59,211 INFO L87 Difference]: Start difference. First operand 185669 states and 260406 transitions. Second operand 12 states. [2020-12-22 08:26:01,132 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-12-22 08:26:01,512 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-22 08:26:03,427 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-12-22 08:26:10,355 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2020-12-22 08:26:11,937 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-12-22 08:26:14,039 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 08:26:14,221 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-22 08:26:15,003 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 08:26:15,182 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 08:26:41,745 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23