/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:24:26,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:24:26,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:24:26,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:24:26,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:24:26,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:24:26,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:24:26,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:24:26,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:24:26,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:24:26,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:24:26,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:24:26,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:24:26,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:24:26,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:24:26,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:24:26,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:24:26,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:24:26,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:24:26,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:24:26,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:24:26,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:24:26,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:24:26,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:24:26,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:24:26,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:24:26,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:24:26,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:24:26,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:24:26,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:24:26,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:24:26,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:24:26,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:24:26,847 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:24:26,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:24:26,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:24:26,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:24:26,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:24:26,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:24:26,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:24:26,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:24:26,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:24:26,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:24:26,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:24:26,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:24:26,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:24:26,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:26,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:24:26,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:24:26,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:24:26,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:24:26,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:24:26,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:24:26,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:24:26,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:24:27,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:24:27,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:24:27,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:24:27,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:24:27,282 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:24:27,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:27,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80354c7/df51a9165be9432c9c6e75d91aa029de/FLAGcb4c23d5a [2020-12-22 07:24:28,244 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:24:28,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:28,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80354c7/df51a9165be9432c9c6e75d91aa029de/FLAGcb4c23d5a [2020-12-22 07:24:28,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be80354c7/df51a9165be9432c9c6e75d91aa029de [2020-12-22 07:24:28,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:24:28,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:24:28,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:28,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:24:28,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:24:28,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:28" (1/1) ... [2020-12-22 07:24:28,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41779e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:28, skipping insertion in model container [2020-12-22 07:24:28,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:28" (1/1) ... [2020-12-22 07:24:28,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:24:28,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:24:29,095 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c[61125,61138] [2020-12-22 07:24:29,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:29,126 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:24:29,253 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c[61125,61138] [2020-12-22 07:24:29,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:24:29,280 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:24:29,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29 WrapperNode [2020-12-22 07:24:29,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:24:29,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:29,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:24:29,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:24:29,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:24:29,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:24:29,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:24:29,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:24:29,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... [2020-12-22 07:24:29,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:24:29,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:24:29,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:24:29,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:24:29,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:24:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:24:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:24:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:24:29,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:24:31,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:24:31,921 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:24:31,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:31 BoogieIcfgContainer [2020-12-22 07:24:31,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:24:31,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:24:31,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:24:31,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:24:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:28" (1/3) ... [2020-12-22 07:24:31,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c807104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:31, skipping insertion in model container [2020-12-22 07:24:31,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:29" (2/3) ... [2020-12-22 07:24:31,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c807104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:31, skipping insertion in model container [2020-12-22 07:24:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:31" (3/3) ... [2020-12-22 07:24:31,937 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2020-12-22 07:24:31,945 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:24:31,951 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:24:31,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:24:32,007 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:24:32,008 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:24:32,008 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:24:32,008 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:24:32,008 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:24:32,008 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:24:32,008 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:24:32,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:24:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states. [2020-12-22 07:24:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:32,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:32,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:32,069 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1253378061, now seen corresponding path program 1 times [2020-12-22 07:24:32,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:32,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970898023] [2020-12-22 07:24:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:32,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970898023] [2020-12-22 07:24:32,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:32,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:24:32,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106177586] [2020-12-22 07:24:32,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:24:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:24:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:32,777 INFO L87 Difference]: Start difference. First operand 715 states. Second operand 2 states. [2020-12-22 07:24:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:32,895 INFO L93 Difference]: Finished difference Result 881 states and 1605 transitions. [2020-12-22 07:24:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:24:32,898 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:24:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:32,930 INFO L225 Difference]: With dead ends: 881 [2020-12-22 07:24:32,930 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:24:32,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:24:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:24:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:24:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:24:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1310 transitions. [2020-12-22 07:24:33,071 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1310 transitions. Word has length 153 [2020-12-22 07:24:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:33,073 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1310 transitions. [2020-12-22 07:24:33,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:24:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1310 transitions. [2020-12-22 07:24:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:24:33,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:33,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:33,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:24:33,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash 743904971, now seen corresponding path program 1 times [2020-12-22 07:24:33,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:33,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069728817] [2020-12-22 07:24:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:33,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069728817] [2020-12-22 07:24:33,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:33,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:24:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683610086] [2020-12-22 07:24:33,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:24:33,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:24:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:33,448 INFO L87 Difference]: Start difference. First operand 711 states and 1310 transitions. Second operand 5 states. [2020-12-22 07:24:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:33,627 INFO L93 Difference]: Finished difference Result 880 states and 1598 transitions. [2020-12-22 07:24:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:24:33,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:24:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:33,635 INFO L225 Difference]: With dead ends: 880 [2020-12-22 07:24:33,635 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:24:33,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:24:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:24:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:24:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1250 transitions. [2020-12-22 07:24:33,672 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1250 transitions. Word has length 153 [2020-12-22 07:24:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:33,673 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1250 transitions. [2020-12-22 07:24:33,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:24:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1250 transitions. [2020-12-22 07:24:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:24:33,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:33,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:33,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:24:33,679 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:33,680 INFO L82 PathProgramCache]: Analyzing trace with hash 323732946, now seen corresponding path program 1 times [2020-12-22 07:24:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:33,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878461804] [2020-12-22 07:24:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:33,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878461804] [2020-12-22 07:24:33,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:33,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:33,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084603856] [2020-12-22 07:24:33,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:33,999 INFO L87 Difference]: Start difference. First operand 711 states and 1250 transitions. Second operand 3 states. [2020-12-22 07:24:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,074 INFO L93 Difference]: Finished difference Result 1028 states and 1793 transitions. [2020-12-22 07:24:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:34,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:24:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,082 INFO L225 Difference]: With dead ends: 1028 [2020-12-22 07:24:34,083 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 07:24:34,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 07:24:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 860. [2020-12-22 07:24:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 07:24:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1501 transitions. [2020-12-22 07:24:34,168 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1501 transitions. Word has length 212 [2020-12-22 07:24:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:34,169 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1501 transitions. [2020-12-22 07:24:34,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1501 transitions. [2020-12-22 07:24:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:24:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:34,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:34,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:24:34,176 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1975826350, now seen corresponding path program 1 times [2020-12-22 07:24:34,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:34,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676025741] [2020-12-22 07:24:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:34,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676025741] [2020-12-22 07:24:34,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:34,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:34,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856039378] [2020-12-22 07:24:34,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:34,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,457 INFO L87 Difference]: Start difference. First operand 860 states and 1501 transitions. Second operand 3 states. [2020-12-22 07:24:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,524 INFO L93 Difference]: Finished difference Result 1466 states and 2529 transitions. [2020-12-22 07:24:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:34,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:24:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,533 INFO L225 Difference]: With dead ends: 1466 [2020-12-22 07:24:34,533 INFO L226 Difference]: Without dead ends: 1152 [2020-12-22 07:24:34,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-12-22 07:24:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1148. [2020-12-22 07:24:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2020-12-22 07:24:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1987 transitions. [2020-12-22 07:24:34,584 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1987 transitions. Word has length 216 [2020-12-22 07:24:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:34,584 INFO L481 AbstractCegarLoop]: Abstraction has 1148 states and 1987 transitions. [2020-12-22 07:24:34,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1987 transitions. [2020-12-22 07:24:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:24:34,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:34,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:34,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:24:34,590 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash 194635210, now seen corresponding path program 1 times [2020-12-22 07:24:34,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:34,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121923663] [2020-12-22 07:24:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:34,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121923663] [2020-12-22 07:24:34,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:34,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:34,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997458626] [2020-12-22 07:24:34,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:34,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:34,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,889 INFO L87 Difference]: Start difference. First operand 1148 states and 1987 transitions. Second operand 3 states. [2020-12-22 07:24:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:34,969 INFO L93 Difference]: Finished difference Result 2308 states and 3945 transitions. [2020-12-22 07:24:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:34,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:24:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:34,982 INFO L225 Difference]: With dead ends: 2308 [2020-12-22 07:24:34,982 INFO L226 Difference]: Without dead ends: 1706 [2020-12-22 07:24:34,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-12-22 07:24:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1700. [2020-12-22 07:24:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1700 states. [2020-12-22 07:24:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2911 transitions. [2020-12-22 07:24:35,073 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2911 transitions. Word has length 220 [2020-12-22 07:24:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:35,074 INFO L481 AbstractCegarLoop]: Abstraction has 1700 states and 2911 transitions. [2020-12-22 07:24:35,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2911 transitions. [2020-12-22 07:24:35,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:24:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:35,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:35,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:24:35,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1875750874, now seen corresponding path program 1 times [2020-12-22 07:24:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:35,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984491896] [2020-12-22 07:24:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:35,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984491896] [2020-12-22 07:24:35,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:35,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187140114] [2020-12-22 07:24:35,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:35,520 INFO L87 Difference]: Start difference. First operand 1700 states and 2911 transitions. Second operand 3 states. [2020-12-22 07:24:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:35,640 INFO L93 Difference]: Finished difference Result 3920 states and 6633 transitions. [2020-12-22 07:24:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:35,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:24:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:35,664 INFO L225 Difference]: With dead ends: 3920 [2020-12-22 07:24:35,664 INFO L226 Difference]: Without dead ends: 2766 [2020-12-22 07:24:35,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2020-12-22 07:24:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2756. [2020-12-22 07:24:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2756 states. [2020-12-22 07:24:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4663 transitions. [2020-12-22 07:24:35,785 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4663 transitions. Word has length 224 [2020-12-22 07:24:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:35,786 INFO L481 AbstractCegarLoop]: Abstraction has 2756 states and 4663 transitions. [2020-12-22 07:24:35,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4663 transitions. [2020-12-22 07:24:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:24:35,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:35,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:35,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:24:35,794 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash 325314, now seen corresponding path program 1 times [2020-12-22 07:24:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:35,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530124487] [2020-12-22 07:24:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530124487] [2020-12-22 07:24:36,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448492697] [2020-12-22 07:24:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,165 INFO L87 Difference]: Start difference. First operand 2756 states and 4663 transitions. Second operand 3 states. [2020-12-22 07:24:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:36,294 INFO L93 Difference]: Finished difference Result 7000 states and 11721 transitions. [2020-12-22 07:24:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:36,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:24:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:36,324 INFO L225 Difference]: With dead ends: 7000 [2020-12-22 07:24:36,324 INFO L226 Difference]: Without dead ends: 4790 [2020-12-22 07:24:36,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2020-12-22 07:24:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4772. [2020-12-22 07:24:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4772 states. [2020-12-22 07:24:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 7975 transitions. [2020-12-22 07:24:36,551 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 7975 transitions. Word has length 228 [2020-12-22 07:24:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:36,552 INFO L481 AbstractCegarLoop]: Abstraction has 4772 states and 7975 transitions. [2020-12-22 07:24:36,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 7975 transitions. [2020-12-22 07:24:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:24:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:36,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:36,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:24:36,560 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1486412190, now seen corresponding path program 1 times [2020-12-22 07:24:36,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:36,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548547156] [2020-12-22 07:24:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:36,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548547156] [2020-12-22 07:24:36,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:36,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:24:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457513738] [2020-12-22 07:24:36,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:24:36,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:24:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:24:36,967 INFO L87 Difference]: Start difference. First operand 4772 states and 7975 transitions. Second operand 7 states. [2020-12-22 07:24:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:37,856 INFO L93 Difference]: Finished difference Result 26566 states and 44464 transitions. [2020-12-22 07:24:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:24:37,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:24:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:37,959 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 07:24:37,959 INFO L226 Difference]: Without dead ends: 22340 [2020-12-22 07:24:37,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:24:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22340 states. [2020-12-22 07:24:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22340 to 10944. [2020-12-22 07:24:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10944 states. [2020-12-22 07:24:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 18278 transitions. [2020-12-22 07:24:38,723 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 18278 transitions. Word has length 232 [2020-12-22 07:24:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:38,724 INFO L481 AbstractCegarLoop]: Abstraction has 10944 states and 18278 transitions. [2020-12-22 07:24:38,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:24:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 18278 transitions. [2020-12-22 07:24:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:24:38,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:38,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:38,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:24:38,736 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash 862725536, now seen corresponding path program 1 times [2020-12-22 07:24:38,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:38,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459826316] [2020-12-22 07:24:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459826316] [2020-12-22 07:24:38,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:38,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518624755] [2020-12-22 07:24:38,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:38,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:38,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:38,975 INFO L87 Difference]: Start difference. First operand 10944 states and 18278 transitions. Second operand 4 states. [2020-12-22 07:24:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:39,486 INFO L93 Difference]: Finished difference Result 25679 states and 42893 transitions. [2020-12-22 07:24:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:39,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:24:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:39,527 INFO L225 Difference]: With dead ends: 25679 [2020-12-22 07:24:39,527 INFO L226 Difference]: Without dead ends: 15281 [2020-12-22 07:24:39,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15281 states. [2020-12-22 07:24:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15281 to 15246. [2020-12-22 07:24:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15246 states. [2020-12-22 07:24:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 25455 transitions. [2020-12-22 07:24:40,323 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 25455 transitions. Word has length 233 [2020-12-22 07:24:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:40,324 INFO L481 AbstractCegarLoop]: Abstraction has 15246 states and 25455 transitions. [2020-12-22 07:24:40,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 25455 transitions. [2020-12-22 07:24:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:24:40,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:40,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:40,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:24:40,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1122687211, now seen corresponding path program 1 times [2020-12-22 07:24:40,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:40,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517710207] [2020-12-22 07:24:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:40,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517710207] [2020-12-22 07:24:40,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:40,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694631425] [2020-12-22 07:24:40,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:40,678 INFO L87 Difference]: Start difference. First operand 15246 states and 25455 transitions. Second operand 4 states. [2020-12-22 07:24:41,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:41,786 INFO L93 Difference]: Finished difference Result 45284 states and 75706 transitions. [2020-12-22 07:24:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:41,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:24:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:41,885 INFO L225 Difference]: With dead ends: 45284 [2020-12-22 07:24:41,886 INFO L226 Difference]: Without dead ends: 30584 [2020-12-22 07:24:41,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30584 states. [2020-12-22 07:24:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30584 to 22679. [2020-12-22 07:24:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22679 states. [2020-12-22 07:24:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22679 states to 22679 states and 37827 transitions. [2020-12-22 07:24:42,952 INFO L78 Accepts]: Start accepts. Automaton has 22679 states and 37827 transitions. Word has length 234 [2020-12-22 07:24:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:42,953 INFO L481 AbstractCegarLoop]: Abstraction has 22679 states and 37827 transitions. [2020-12-22 07:24:42,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 22679 states and 37827 transitions. [2020-12-22 07:24:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:42,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:42,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:42,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:24:42,972 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2140950537, now seen corresponding path program 1 times [2020-12-22 07:24:42,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:42,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552117153] [2020-12-22 07:24:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552117153] [2020-12-22 07:24:43,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:43,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022953883] [2020-12-22 07:24:43,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:43,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:43,188 INFO L87 Difference]: Start difference. First operand 22679 states and 37827 transitions. Second operand 3 states. [2020-12-22 07:24:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:44,102 INFO L93 Difference]: Finished difference Result 52304 states and 87469 transitions. [2020-12-22 07:24:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:44,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:24:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:44,197 INFO L225 Difference]: With dead ends: 52304 [2020-12-22 07:24:44,197 INFO L226 Difference]: Without dead ends: 35949 [2020-12-22 07:24:44,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35949 states. [2020-12-22 07:24:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35949 to 35947. [2020-12-22 07:24:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35947 states. [2020-12-22 07:24:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35947 states to 35947 states and 59851 transitions. [2020-12-22 07:24:45,669 INFO L78 Accepts]: Start accepts. Automaton has 35947 states and 59851 transitions. Word has length 235 [2020-12-22 07:24:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:45,669 INFO L481 AbstractCegarLoop]: Abstraction has 35947 states and 59851 transitions. [2020-12-22 07:24:45,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 35947 states and 59851 transitions. [2020-12-22 07:24:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:45,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:45,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:45,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:45,678 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1580766843, now seen corresponding path program 1 times [2020-12-22 07:24:45,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:45,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636842090] [2020-12-22 07:24:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:46,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636842090] [2020-12-22 07:24:46,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:46,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:46,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590808009] [2020-12-22 07:24:46,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:46,065 INFO L87 Difference]: Start difference. First operand 35947 states and 59851 transitions. Second operand 3 states. [2020-12-22 07:24:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:47,035 INFO L93 Difference]: Finished difference Result 70304 states and 117205 transitions. [2020-12-22 07:24:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:47,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:24:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:47,288 INFO L225 Difference]: With dead ends: 70304 [2020-12-22 07:24:47,288 INFO L226 Difference]: Without dead ends: 51206 [2020-12-22 07:24:47,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51206 states. [2020-12-22 07:24:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51206 to 51204. [2020-12-22 07:24:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51204 states. [2020-12-22 07:24:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51204 states to 51204 states and 85035 transitions. [2020-12-22 07:24:49,195 INFO L78 Accepts]: Start accepts. Automaton has 51204 states and 85035 transitions. Word has length 235 [2020-12-22 07:24:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:49,196 INFO L481 AbstractCegarLoop]: Abstraction has 51204 states and 85035 transitions. [2020-12-22 07:24:49,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 51204 states and 85035 transitions. [2020-12-22 07:24:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:49,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:49,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:49,459 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1900282093, now seen corresponding path program 1 times [2020-12-22 07:24:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:49,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838345283] [2020-12-22 07:24:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:49,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838345283] [2020-12-22 07:24:49,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:49,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:24:49,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334971515] [2020-12-22 07:24:49,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:24:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:24:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:49,754 INFO L87 Difference]: Start difference. First operand 51204 states and 85035 transitions. Second operand 3 states. [2020-12-22 07:24:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:51,373 INFO L93 Difference]: Finished difference Result 99832 states and 166071 transitions. [2020-12-22 07:24:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:24:51,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:24:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:51,612 INFO L225 Difference]: With dead ends: 99832 [2020-12-22 07:24:51,613 INFO L226 Difference]: Without dead ends: 72694 [2020-12-22 07:24:51,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:24:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72694 states. [2020-12-22 07:24:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72694 to 72692. [2020-12-22 07:24:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72692 states. [2020-12-22 07:24:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72692 states to 72692 states and 120401 transitions. [2020-12-22 07:24:53,775 INFO L78 Accepts]: Start accepts. Automaton has 72692 states and 120401 transitions. Word has length 235 [2020-12-22 07:24:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:53,776 INFO L481 AbstractCegarLoop]: Abstraction has 72692 states and 120401 transitions. [2020-12-22 07:24:53,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:24:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 72692 states and 120401 transitions. [2020-12-22 07:24:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:24:53,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:53,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:53,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:53,782 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:53,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1923031415, now seen corresponding path program 1 times [2020-12-22 07:24:53,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064296414] [2020-12-22 07:24:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:24:54,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064296414] [2020-12-22 07:24:54,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:54,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755335414] [2020-12-22 07:24:54,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:54,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:54,234 INFO L87 Difference]: Start difference. First operand 72692 states and 120401 transitions. Second operand 4 states. [2020-12-22 07:24:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:56,866 INFO L93 Difference]: Finished difference Result 237257 states and 393670 transitions. [2020-12-22 07:24:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:56,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:24:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:57,286 INFO L225 Difference]: With dead ends: 237257 [2020-12-22 07:24:57,286 INFO L226 Difference]: Without dead ends: 165360 [2020-12-22 07:24:57,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165360 states. [2020-12-22 07:25:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165360 to 118818. [2020-12-22 07:25:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118818 states. [2020-12-22 07:25:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118818 states to 118818 states and 196479 transitions. [2020-12-22 07:25:01,139 INFO L78 Accepts]: Start accepts. Automaton has 118818 states and 196479 transitions. Word has length 235 [2020-12-22 07:25:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:01,142 INFO L481 AbstractCegarLoop]: Abstraction has 118818 states and 196479 transitions. [2020-12-22 07:25:01,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 118818 states and 196479 transitions. [2020-12-22 07:25:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:01,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:01,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:01,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:25:01,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash 568583988, now seen corresponding path program 1 times [2020-12-22 07:25:01,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:01,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772736165] [2020-12-22 07:25:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:01,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772736165] [2020-12-22 07:25:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:01,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915934612] [2020-12-22 07:25:01,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:01,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:01,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:01,332 INFO L87 Difference]: Start difference. First operand 118818 states and 196479 transitions. Second operand 3 states. [2020-12-22 07:25:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:04,345 INFO L93 Difference]: Finished difference Result 231880 states and 384221 transitions. [2020-12-22 07:25:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:04,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:04,985 INFO L225 Difference]: With dead ends: 231880 [2020-12-22 07:25:04,985 INFO L226 Difference]: Without dead ends: 167993 [2020-12-22 07:25:05,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167993 states. [2020-12-22 07:25:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167993 to 167991. [2020-12-22 07:25:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167991 states. [2020-12-22 07:25:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167991 states to 167991 states and 277009 transitions. [2020-12-22 07:25:09,415 INFO L78 Accepts]: Start accepts. Automaton has 167991 states and 277009 transitions. Word has length 235 [2020-12-22 07:25:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:09,415 INFO L481 AbstractCegarLoop]: Abstraction has 167991 states and 277009 transitions. [2020-12-22 07:25:09,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 167991 states and 277009 transitions. [2020-12-22 07:25:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:09,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:09,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:09,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:25:09,419 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -311882046, now seen corresponding path program 1 times [2020-12-22 07:25:09,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:09,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64244965] [2020-12-22 07:25:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:09,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64244965] [2020-12-22 07:25:09,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:09,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:09,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825610226] [2020-12-22 07:25:09,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:09,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:09,586 INFO L87 Difference]: Start difference. First operand 167991 states and 277009 transitions. Second operand 3 states. [2020-12-22 07:25:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:14,139 INFO L93 Difference]: Finished difference Result 371939 states and 613964 transitions. [2020-12-22 07:25:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:14,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:14,876 INFO L225 Difference]: With dead ends: 371939 [2020-12-22 07:25:14,877 INFO L226 Difference]: Without dead ends: 255733 [2020-12-22 07:25:14,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255733 states. [2020-12-22 07:25:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255733 to 255731. [2020-12-22 07:25:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255731 states. [2020-12-22 07:25:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255731 states to 255731 states and 419742 transitions. [2020-12-22 07:25:21,785 INFO L78 Accepts]: Start accepts. Automaton has 255731 states and 419742 transitions. Word has length 235 [2020-12-22 07:25:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:21,785 INFO L481 AbstractCegarLoop]: Abstraction has 255731 states and 419742 transitions. [2020-12-22 07:25:21,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 255731 states and 419742 transitions. [2020-12-22 07:25:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:25:21,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:21,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:21,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:25:21,788 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2020032652, now seen corresponding path program 1 times [2020-12-22 07:25:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:21,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411830019] [2020-12-22 07:25:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:22,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411830019] [2020-12-22 07:25:22,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:22,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426363772] [2020-12-22 07:25:22,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:22,461 INFO L87 Difference]: Start difference. First operand 255731 states and 419742 transitions. Second operand 4 states. [2020-12-22 07:25:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:32,705 INFO L93 Difference]: Finished difference Result 837752 states and 1377930 transitions. [2020-12-22 07:25:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:32,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:25:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:34,128 INFO L225 Difference]: With dead ends: 837752 [2020-12-22 07:25:34,128 INFO L226 Difference]: Without dead ends: 582633 [2020-12-22 07:25:34,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582633 states. [2020-12-22 07:25:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582633 to 418325. [2020-12-22 07:25:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418325 states. [2020-12-22 07:25:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418325 states to 418325 states and 685221 transitions. [2020-12-22 07:25:49,965 INFO L78 Accepts]: Start accepts. Automaton has 418325 states and 685221 transitions. Word has length 236 [2020-12-22 07:25:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:49,966 INFO L481 AbstractCegarLoop]: Abstraction has 418325 states and 685221 transitions. [2020-12-22 07:25:49,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 418325 states and 685221 transitions. [2020-12-22 07:25:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:25:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:49,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:49,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:25:49,969 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 901108046, now seen corresponding path program 1 times [2020-12-22 07:25:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:49,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635200755] [2020-12-22 07:25:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:50,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635200755] [2020-12-22 07:25:50,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:50,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:50,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889323784] [2020-12-22 07:25:50,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:50,322 INFO L87 Difference]: Start difference. First operand 418325 states and 685221 transitions. Second operand 4 states. [2020-12-22 07:26:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:11,242 INFO L93 Difference]: Finished difference Result 1356096 states and 2226004 transitions. [2020-12-22 07:26:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:11,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:26:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:13,925 INFO L225 Difference]: With dead ends: 1356096 [2020-12-22 07:26:13,926 INFO L226 Difference]: Without dead ends: 938383 [2020-12-22 07:26:14,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:26:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938383 states. [2020-12-22 07:26:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938383 to 676987. [2020-12-22 07:26:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:26:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1106708 transitions. [2020-12-22 07:26:43,268 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1106708 transitions. Word has length 237 [2020-12-22 07:26:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:43,269 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1106708 transitions. [2020-12-22 07:26:43,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1106708 transitions. [2020-12-22 07:26:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:26:43,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:43,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:43,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:26:43,273 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:43,274 INFO L82 PathProgramCache]: Analyzing trace with hash 371666150, now seen corresponding path program 1 times [2020-12-22 07:26:43,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:43,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890470077] [2020-12-22 07:26:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:44,254 WARN L197 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-22 07:26:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:44,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890470077] [2020-12-22 07:26:44,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:44,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:26:44,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461934423] [2020-12-22 07:26:44,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:26:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:26:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:26:44,488 INFO L87 Difference]: Start difference. First operand 676987 states and 1106708 transitions. Second operand 7 states. [2020-12-22 07:27:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:05,126 INFO L93 Difference]: Finished difference Result 1353366 states and 2212354 transitions. [2020-12-22 07:27:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:27:05,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:27:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:06,793 INFO L225 Difference]: With dead ends: 1353366 [2020-12-22 07:27:06,794 INFO L226 Difference]: Without dead ends: 676991 [2020-12-22 07:27:07,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:27:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676991 states. [2020-12-22 07:27:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676991 to 676987. [2020-12-22 07:27:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:27:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1103583 transitions. [2020-12-22 07:27:28,839 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1103583 transitions. Word has length 239 [2020-12-22 07:27:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:28,839 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1103583 transitions. [2020-12-22 07:27:28,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:27:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1103583 transitions. [2020-12-22 07:27:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:27:28,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:28,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:28,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:27:28,842 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 379198031, now seen corresponding path program 1 times [2020-12-22 07:27:28,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:28,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634575982] [2020-12-22 07:27:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat