/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:06:37,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:06:37,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:06:37,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:06:37,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:06:37,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:06:37,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:06:37,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:06:37,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:06:37,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:06:37,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:06:37,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:06:37,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:06:37,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:06:37,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:06:37,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:06:37,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:06:37,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:06:37,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:06:37,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:06:37,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:06:37,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:06:37,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:06:37,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:06:37,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:06:37,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:06:37,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:06:37,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:06:37,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:06:37,518 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:06:37,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:06:37,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:06:37,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:06:37,523 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:06:37,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:06:37,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:06:37,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:06:37,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:06:37,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:06:37,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:06:37,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:06:37,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:06:37,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:06:37,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:06:37,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:06:37,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:06:37,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:37,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:06:37,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:06:37,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:06:37,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:06:37,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:06:37,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:06:37,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:06:37,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:06:37,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:06:37,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:06:37,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:06:37,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:06:37,997 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:06:37,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:06:38,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5489f6ea/5f120eeaeb8346798bcecec7ad5b1f8f/FLAG70f72c465 [2020-12-22 08:06:38,728 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:06:38,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:06:38,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5489f6ea/5f120eeaeb8346798bcecec7ad5b1f8f/FLAG70f72c465 [2020-12-22 08:06:39,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5489f6ea/5f120eeaeb8346798bcecec7ad5b1f8f [2020-12-22 08:06:39,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:06:39,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:06:39,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:39,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:06:39,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:06:39,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:39,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d602fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39, skipping insertion in model container [2020-12-22 08:06:39,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:39,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:06:39,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:06:39,439 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14013,14026] [2020-12-22 08:06:39,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:39,615 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:06:39,756 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14013,14026] [2020-12-22 08:06:39,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:06:39,930 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:06:39,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39 WrapperNode [2020-12-22 08:06:39,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:06:39,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:39,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:06:39,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:06:39,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:39,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:06:40,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:06:40,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:06:40,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:06:40,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... [2020-12-22 08:06:40,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:06:40,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:06:40,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:06:40,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:06:40,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:06:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:06:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:06:40,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:06:40,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:06:42,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:06:42,028 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:06:42,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:42 BoogieIcfgContainer [2020-12-22 08:06:42,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:06:42,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:06:42,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:06:42,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:06:42,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:06:39" (1/3) ... [2020-12-22 08:06:42,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5125a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:42, skipping insertion in model container [2020-12-22 08:06:42,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:06:39" (2/3) ... [2020-12-22 08:06:42,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5125a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:06:42, skipping insertion in model container [2020-12-22 08:06:42,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:06:42" (3/3) ... [2020-12-22 08:06:42,040 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:06:42,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:06:42,052 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:06:42,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:06:42,100 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:06:42,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:06:42,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:06:42,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:06:42,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:06:42,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:06:42,101 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:06:42,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:06:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2020-12-22 08:06:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:06:42,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:42,142 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] [2020-12-22 08:06:42,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 811765820, now seen corresponding path program 1 times [2020-12-22 08:06:42,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:42,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415654528] [2020-12-22 08:06:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:42,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415654528] [2020-12-22 08:06:42,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:42,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:42,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393505390] [2020-12-22 08:06:42,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:42,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:42,796 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2020-12-22 08:06:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:43,103 INFO L93 Difference]: Finished difference Result 634 states and 1113 transitions. [2020-12-22 08:06:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:43,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:06:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:43,147 INFO L225 Difference]: With dead ends: 634 [2020-12-22 08:06:43,148 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 08:06:43,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 08:06:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2020-12-22 08:06:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-12-22 08:06:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 757 transitions. [2020-12-22 08:06:43,251 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 757 transitions. Word has length 146 [2020-12-22 08:06:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:43,253 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 757 transitions. [2020-12-22 08:06:43,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 757 transitions. [2020-12-22 08:06:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:06:43,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:43,282 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] [2020-12-22 08:06:43,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:06:43,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1665088068, now seen corresponding path program 1 times [2020-12-22 08:06:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:43,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472641338] [2020-12-22 08:06:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:43,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472641338] [2020-12-22 08:06:43,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:43,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581877551] [2020-12-22 08:06:43,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:43,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,504 INFO L87 Difference]: Start difference. First operand 508 states and 757 transitions. Second operand 3 states. [2020-12-22 08:06:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:43,666 INFO L93 Difference]: Finished difference Result 1104 states and 1692 transitions. [2020-12-22 08:06:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:43,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 08:06:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:43,674 INFO L225 Difference]: With dead ends: 1104 [2020-12-22 08:06:43,674 INFO L226 Difference]: Without dead ends: 894 [2020-12-22 08:06:43,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-12-22 08:06:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 892. [2020-12-22 08:06:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-12-22 08:06:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1341 transitions. [2020-12-22 08:06:43,733 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1341 transitions. Word has length 146 [2020-12-22 08:06:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:43,734 INFO L481 AbstractCegarLoop]: Abstraction has 892 states and 1341 transitions. [2020-12-22 08:06:43,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1341 transitions. [2020-12-22 08:06:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 08:06:43,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:43,740 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] [2020-12-22 08:06:43,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:06:43,740 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2001145712, now seen corresponding path program 1 times [2020-12-22 08:06:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:43,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559305142] [2020-12-22 08:06:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:44,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559305142] [2020-12-22 08:06:44,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:44,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:44,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955658331] [2020-12-22 08:06:44,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:44,029 INFO L87 Difference]: Start difference. First operand 892 states and 1341 transitions. Second operand 4 states. [2020-12-22 08:06:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:44,279 INFO L93 Difference]: Finished difference Result 2611 states and 3916 transitions. [2020-12-22 08:06:44,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:44,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 08:06:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:44,295 INFO L225 Difference]: With dead ends: 2611 [2020-12-22 08:06:44,295 INFO L226 Difference]: Without dead ends: 1728 [2020-12-22 08:06:44,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2020-12-22 08:06:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2020-12-22 08:06:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2020-12-22 08:06:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2568 transitions. [2020-12-22 08:06:44,416 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2568 transitions. Word has length 146 [2020-12-22 08:06:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:44,417 INFO L481 AbstractCegarLoop]: Abstraction has 1726 states and 2568 transitions. [2020-12-22 08:06:44,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2568 transitions. [2020-12-22 08:06:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 08:06:44,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:44,423 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] [2020-12-22 08:06:44,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:06:44,423 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash -153017852, now seen corresponding path program 1 times [2020-12-22 08:06:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:44,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437888323] [2020-12-22 08:06:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:44,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437888323] [2020-12-22 08:06:44,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:44,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:44,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278868115] [2020-12-22 08:06:44,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:44,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,513 INFO L87 Difference]: Start difference. First operand 1726 states and 2568 transitions. Second operand 3 states. [2020-12-22 08:06:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:44,751 INFO L93 Difference]: Finished difference Result 5140 states and 7642 transitions. [2020-12-22 08:06:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:44,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 08:06:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:44,771 INFO L225 Difference]: With dead ends: 5140 [2020-12-22 08:06:44,771 INFO L226 Difference]: Without dead ends: 3442 [2020-12-22 08:06:44,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2020-12-22 08:06:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 1728. [2020-12-22 08:06:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1728 states. [2020-12-22 08:06:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2570 transitions. [2020-12-22 08:06:44,914 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2570 transitions. Word has length 147 [2020-12-22 08:06:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:44,914 INFO L481 AbstractCegarLoop]: Abstraction has 1728 states and 2570 transitions. [2020-12-22 08:06:44,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2570 transitions. [2020-12-22 08:06:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 08:06:44,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:44,919 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] [2020-12-22 08:06:44,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:06:44,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:44,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1214315247, now seen corresponding path program 1 times [2020-12-22 08:06:44,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:44,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504373707] [2020-12-22 08:06:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:45,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504373707] [2020-12-22 08:06:45,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:45,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:45,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243542635] [2020-12-22 08:06:45,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:45,153 INFO L87 Difference]: Start difference. First operand 1728 states and 2570 transitions. Second operand 4 states. [2020-12-22 08:06:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:45,698 INFO L93 Difference]: Finished difference Result 5036 states and 7470 transitions. [2020-12-22 08:06:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:45,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-12-22 08:06:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:45,723 INFO L225 Difference]: With dead ends: 5036 [2020-12-22 08:06:45,724 INFO L226 Difference]: Without dead ends: 3338 [2020-12-22 08:06:45,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-12-22 08:06:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-12-22 08:06:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-12-22 08:06:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4908 transitions. [2020-12-22 08:06:46,105 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4908 transitions. Word has length 148 [2020-12-22 08:06:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:46,106 INFO L481 AbstractCegarLoop]: Abstraction has 3336 states and 4908 transitions. [2020-12-22 08:06:46,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4908 transitions. [2020-12-22 08:06:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 08:06:46,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:46,114 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] [2020-12-22 08:06:46,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:06:46,114 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:46,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:46,115 INFO L82 PathProgramCache]: Analyzing trace with hash 568493541, now seen corresponding path program 1 times [2020-12-22 08:06:46,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:46,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887949651] [2020-12-22 08:06:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887949651] [2020-12-22 08:06:46,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:46,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:46,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284762426] [2020-12-22 08:06:46,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:46,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:46,219 INFO L87 Difference]: Start difference. First operand 3336 states and 4908 transitions. Second operand 3 states. [2020-12-22 08:06:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:46,798 INFO L93 Difference]: Finished difference Result 9932 states and 14604 transitions. [2020-12-22 08:06:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:46,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2020-12-22 08:06:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:46,831 INFO L225 Difference]: With dead ends: 9932 [2020-12-22 08:06:46,831 INFO L226 Difference]: Without dead ends: 6640 [2020-12-22 08:06:46,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2020-12-22 08:06:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 3340. [2020-12-22 08:06:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3340 states. [2020-12-22 08:06:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4912 transitions. [2020-12-22 08:06:47,192 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4912 transitions. Word has length 149 [2020-12-22 08:06:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:47,193 INFO L481 AbstractCegarLoop]: Abstraction has 3340 states and 4912 transitions. [2020-12-22 08:06:47,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4912 transitions. [2020-12-22 08:06:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 08:06:47,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:47,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:47,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:06:47,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1727483410, now seen corresponding path program 1 times [2020-12-22 08:06:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643177531] [2020-12-22 08:06:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643177531] [2020-12-22 08:06:47,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:47,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746572763] [2020-12-22 08:06:47,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:47,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:47,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:47,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:47,467 INFO L87 Difference]: Start difference. First operand 3340 states and 4912 transitions. Second operand 4 states. [2020-12-22 08:06:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:48,049 INFO L93 Difference]: Finished difference Result 9071 states and 13289 transitions. [2020-12-22 08:06:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:48,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-12-22 08:06:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:48,078 INFO L225 Difference]: With dead ends: 9071 [2020-12-22 08:06:48,078 INFO L226 Difference]: Without dead ends: 5779 [2020-12-22 08:06:48,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5779 states. [2020-12-22 08:06:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5779 to 5777. [2020-12-22 08:06:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5777 states. [2020-12-22 08:06:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 8367 transitions. [2020-12-22 08:06:48,535 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 8367 transitions. Word has length 150 [2020-12-22 08:06:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:48,535 INFO L481 AbstractCegarLoop]: Abstraction has 5777 states and 8367 transitions. [2020-12-22 08:06:48,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 8367 transitions. [2020-12-22 08:06:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 08:06:48,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:48,545 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] [2020-12-22 08:06:48,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:06:48,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash 982054470, now seen corresponding path program 1 times [2020-12-22 08:06:48,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:48,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236473204] [2020-12-22 08:06:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236473204] [2020-12-22 08:06:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961663360] [2020-12-22 08:06:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:48,661 INFO L87 Difference]: Start difference. First operand 5777 states and 8367 transitions. Second operand 3 states. [2020-12-22 08:06:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:49,446 INFO L93 Difference]: Finished difference Result 16923 states and 24559 transitions. [2020-12-22 08:06:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:49,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-22 08:06:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:49,484 INFO L225 Difference]: With dead ends: 16923 [2020-12-22 08:06:49,485 INFO L226 Difference]: Without dead ends: 11462 [2020-12-22 08:06:49,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11462 states. [2020-12-22 08:06:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11462 to 5785. [2020-12-22 08:06:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5785 states. [2020-12-22 08:06:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 8375 transitions. [2020-12-22 08:06:49,957 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 8375 transitions. Word has length 151 [2020-12-22 08:06:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:49,957 INFO L481 AbstractCegarLoop]: Abstraction has 5785 states and 8375 transitions. [2020-12-22 08:06:49,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 8375 transitions. [2020-12-22 08:06:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:06:49,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:49,968 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] [2020-12-22 08:06:49,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:06:49,968 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1043523012, now seen corresponding path program 1 times [2020-12-22 08:06:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:49,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072502771] [2020-12-22 08:06:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:50,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072502771] [2020-12-22 08:06:50,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:50,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:06:50,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626785458] [2020-12-22 08:06:50,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:06:50,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:06:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:50,204 INFO L87 Difference]: Start difference. First operand 5785 states and 8375 transitions. Second operand 5 states. [2020-12-22 08:06:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:51,053 INFO L93 Difference]: Finished difference Result 15762 states and 22719 transitions. [2020-12-22 08:06:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:51,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-12-22 08:06:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:51,085 INFO L225 Difference]: With dead ends: 15762 [2020-12-22 08:06:51,085 INFO L226 Difference]: Without dead ends: 10065 [2020-12-22 08:06:51,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2020-12-22 08:06:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 10063. [2020-12-22 08:06:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10063 states. [2020-12-22 08:06:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 14323 transitions. [2020-12-22 08:06:51,870 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 14323 transitions. Word has length 152 [2020-12-22 08:06:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:51,871 INFO L481 AbstractCegarLoop]: Abstraction has 10063 states and 14323 transitions. [2020-12-22 08:06:51,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:06:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 14323 transitions. [2020-12-22 08:06:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 08:06:51,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:51,888 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] [2020-12-22 08:06:51,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:06:51,889 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash -333116525, now seen corresponding path program 1 times [2020-12-22 08:06:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48682242] [2020-12-22 08:06:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48682242] [2020-12-22 08:06:52,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:52,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734753995] [2020-12-22 08:06:52,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:52,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:52,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:52,078 INFO L87 Difference]: Start difference. First operand 10063 states and 14323 transitions. Second operand 4 states. [2020-12-22 08:06:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:52,712 INFO L93 Difference]: Finished difference Result 18550 states and 26416 transitions. [2020-12-22 08:06:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:52,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 08:06:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:52,733 INFO L225 Difference]: With dead ends: 18550 [2020-12-22 08:06:52,734 INFO L226 Difference]: Without dead ends: 8561 [2020-12-22 08:06:52,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8561 states. [2020-12-22 08:06:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8561 to 8561. [2020-12-22 08:06:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8561 states. [2020-12-22 08:06:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8561 states to 8561 states and 12196 transitions. [2020-12-22 08:06:53,404 INFO L78 Accepts]: Start accepts. Automaton has 8561 states and 12196 transitions. Word has length 152 [2020-12-22 08:06:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:53,404 INFO L481 AbstractCegarLoop]: Abstraction has 8561 states and 12196 transitions. [2020-12-22 08:06:53,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 8561 states and 12196 transitions. [2020-12-22 08:06:53,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:06:53,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:53,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:53,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:06:53,417 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1970649822, now seen corresponding path program 1 times [2020-12-22 08:06:53,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:53,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660867440] [2020-12-22 08:06:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:53,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660867440] [2020-12-22 08:06:53,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:53,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7380626] [2020-12-22 08:06:53,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:53,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:53,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:53,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:53,526 INFO L87 Difference]: Start difference. First operand 8561 states and 12196 transitions. Second operand 3 states. [2020-12-22 08:06:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:54,600 INFO L93 Difference]: Finished difference Result 23111 states and 33322 transitions. [2020-12-22 08:06:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:54,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 08:06:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:54,637 INFO L225 Difference]: With dead ends: 23111 [2020-12-22 08:06:54,637 INFO L226 Difference]: Without dead ends: 15939 [2020-12-22 08:06:54,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15939 states. [2020-12-22 08:06:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15939 to 15937. [2020-12-22 08:06:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15937 states. [2020-12-22 08:06:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15937 states to 15937 states and 22716 transitions. [2020-12-22 08:06:55,777 INFO L78 Accepts]: Start accepts. Automaton has 15937 states and 22716 transitions. Word has length 158 [2020-12-22 08:06:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:55,777 INFO L481 AbstractCegarLoop]: Abstraction has 15937 states and 22716 transitions. [2020-12-22 08:06:55,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15937 states and 22716 transitions. [2020-12-22 08:06:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 08:06:55,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:55,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:55,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:06:55,798 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash 242334909, now seen corresponding path program 1 times [2020-12-22 08:06:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:55,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063377693] [2020-12-22 08:06:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063377693] [2020-12-22 08:06:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725046750] [2020-12-22 08:06:56,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:56,049 INFO L87 Difference]: Start difference. First operand 15937 states and 22716 transitions. Second operand 4 states. [2020-12-22 08:06:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:57,619 INFO L93 Difference]: Finished difference Result 41794 states and 59528 transitions. [2020-12-22 08:06:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:57,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-12-22 08:06:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:57,661 INFO L225 Difference]: With dead ends: 41794 [2020-12-22 08:06:57,661 INFO L226 Difference]: Without dead ends: 25991 [2020-12-22 08:06:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:06:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25991 states. [2020-12-22 08:06:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25991 to 25989. [2020-12-22 08:06:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25989 states. [2020-12-22 08:06:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25989 states to 25989 states and 36554 transitions. [2020-12-22 08:06:59,347 INFO L78 Accepts]: Start accepts. Automaton has 25989 states and 36554 transitions. Word has length 158 [2020-12-22 08:06:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:59,348 INFO L481 AbstractCegarLoop]: Abstraction has 25989 states and 36554 transitions. [2020-12-22 08:06:59,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25989 states and 36554 transitions. [2020-12-22 08:06:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 08:06:59,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:59,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:06:59,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:06:59,375 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1170801831, now seen corresponding path program 1 times [2020-12-22 08:06:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352949112] [2020-12-22 08:06:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:59,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352949112] [2020-12-22 08:06:59,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:59,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:59,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73903194] [2020-12-22 08:06:59,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:59,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:59,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:59,529 INFO L87 Difference]: Start difference. First operand 25989 states and 36554 transitions. Second operand 4 states. [2020-12-22 08:07:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:01,396 INFO L93 Difference]: Finished difference Result 46573 states and 65556 transitions. [2020-12-22 08:07:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:01,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 08:07:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:01,437 INFO L225 Difference]: With dead ends: 46573 [2020-12-22 08:07:01,438 INFO L226 Difference]: Without dead ends: 25989 [2020-12-22 08:07:01,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25989 states. [2020-12-22 08:07:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25989 to 25989. [2020-12-22 08:07:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25989 states. [2020-12-22 08:07:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25989 states to 25989 states and 36553 transitions. [2020-12-22 08:07:03,215 INFO L78 Accepts]: Start accepts. Automaton has 25989 states and 36553 transitions. Word has length 160 [2020-12-22 08:07:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:03,215 INFO L481 AbstractCegarLoop]: Abstraction has 25989 states and 36553 transitions. [2020-12-22 08:07:03,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 25989 states and 36553 transitions. [2020-12-22 08:07:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 08:07:03,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:03,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:03,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:07:03,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -253898244, now seen corresponding path program 1 times [2020-12-22 08:07:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:03,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351789680] [2020-12-22 08:07:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:03,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351789680] [2020-12-22 08:07:03,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:03,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:03,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087715732] [2020-12-22 08:07:03,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:03,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:03,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:03,333 INFO L87 Difference]: Start difference. First operand 25989 states and 36553 transitions. Second operand 3 states. [2020-12-22 08:07:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:05,802 INFO L93 Difference]: Finished difference Result 64547 states and 90895 transitions. [2020-12-22 08:07:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:07:05,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 08:07:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:05,863 INFO L225 Difference]: With dead ends: 64547 [2020-12-22 08:07:05,863 INFO L226 Difference]: Without dead ends: 40439 [2020-12-22 08:07:05,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40439 states. [2020-12-22 08:07:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40439 to 40437. [2020-12-22 08:07:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40437 states. [2020-12-22 08:07:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40437 states to 40437 states and 55959 transitions. [2020-12-22 08:07:08,500 INFO L78 Accepts]: Start accepts. Automaton has 40437 states and 55959 transitions. Word has length 160 [2020-12-22 08:07:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:08,500 INFO L481 AbstractCegarLoop]: Abstraction has 40437 states and 55959 transitions. [2020-12-22 08:07:08,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 40437 states and 55959 transitions. [2020-12-22 08:07:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:07:08,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:08,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:08,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:07:08,526 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash 194899483, now seen corresponding path program 1 times [2020-12-22 08:07:08,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:08,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912289134] [2020-12-22 08:07:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:08,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912289134] [2020-12-22 08:07:08,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:08,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:08,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593969803] [2020-12-22 08:07:08,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:08,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:08,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:08,741 INFO L87 Difference]: Start difference. First operand 40437 states and 55959 transitions. Second operand 4 states. [2020-12-22 08:07:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:13,165 INFO L93 Difference]: Finished difference Result 94547 states and 135043 transitions. [2020-12-22 08:07:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:13,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 08:07:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:13,272 INFO L225 Difference]: With dead ends: 94547 [2020-12-22 08:07:13,273 INFO L226 Difference]: Without dead ends: 75793 [2020-12-22 08:07:13,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75793 states. [2020-12-22 08:07:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75793 to 75791. [2020-12-22 08:07:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75791 states. [2020-12-22 08:07:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75791 states to 75791 states and 105241 transitions. [2020-12-22 08:07:18,352 INFO L78 Accepts]: Start accepts. Automaton has 75791 states and 105241 transitions. Word has length 166 [2020-12-22 08:07:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:18,353 INFO L481 AbstractCegarLoop]: Abstraction has 75791 states and 105241 transitions. [2020-12-22 08:07:18,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 75791 states and 105241 transitions. [2020-12-22 08:07:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:07:18,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:18,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:18,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:07:18,398 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:18,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:18,398 INFO L82 PathProgramCache]: Analyzing trace with hash 29243323, now seen corresponding path program 1 times [2020-12-22 08:07:18,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:18,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057393040] [2020-12-22 08:07:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:18,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057393040] [2020-12-22 08:07:18,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:18,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:07:18,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040554833] [2020-12-22 08:07:18,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:07:18,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:18,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:07:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:18,583 INFO L87 Difference]: Start difference. First operand 75791 states and 105241 transitions. Second operand 5 states. [2020-12-22 08:07:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:26,497 INFO L93 Difference]: Finished difference Result 134743 states and 198077 transitions. [2020-12-22 08:07:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:07:26,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-12-22 08:07:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:26,668 INFO L225 Difference]: With dead ends: 134743 [2020-12-22 08:07:26,669 INFO L226 Difference]: Without dead ends: 118837 [2020-12-22 08:07:26,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118837 states. [2020-12-22 08:07:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118837 to 87151. [2020-12-22 08:07:33,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87151 states. [2020-12-22 08:07:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87151 states to 87151 states and 122993 transitions. [2020-12-22 08:07:33,516 INFO L78 Accepts]: Start accepts. Automaton has 87151 states and 122993 transitions. Word has length 166 [2020-12-22 08:07:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:33,516 INFO L481 AbstractCegarLoop]: Abstraction has 87151 states and 122993 transitions. [2020-12-22 08:07:33,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:07:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 87151 states and 122993 transitions. [2020-12-22 08:07:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:07:33,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:33,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:33,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:07:33,566 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1954854161, now seen corresponding path program 1 times [2020-12-22 08:07:33,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:33,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446577122] [2020-12-22 08:07:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446577122] [2020-12-22 08:07:33,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:33,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:07:33,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071069617] [2020-12-22 08:07:33,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:07:33,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:33,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:07:33,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:07:33,890 INFO L87 Difference]: Start difference. First operand 87151 states and 122993 transitions. Second operand 8 states. [2020-12-22 08:07:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:39,943 INFO L93 Difference]: Finished difference Result 123623 states and 179655 transitions. [2020-12-22 08:07:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:39,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-22 08:07:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:40,048 INFO L225 Difference]: With dead ends: 123623 [2020-12-22 08:07:40,049 INFO L226 Difference]: Without dead ends: 87153 [2020-12-22 08:07:40,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:07:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87153 states. [2020-12-22 08:07:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87153 to 87151. [2020-12-22 08:07:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87151 states. [2020-12-22 08:07:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87151 states to 87151 states and 122385 transitions. [2020-12-22 08:07:46,721 INFO L78 Accepts]: Start accepts. Automaton has 87151 states and 122385 transitions. Word has length 166 [2020-12-22 08:07:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:46,721 INFO L481 AbstractCegarLoop]: Abstraction has 87151 states and 122385 transitions. [2020-12-22 08:07:46,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:07:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 87151 states and 122385 transitions. [2020-12-22 08:07:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:07:46,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:46,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:46,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:07:46,769 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1507391155, now seen corresponding path program 1 times [2020-12-22 08:07:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:46,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70668816] [2020-12-22 08:07:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:47,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70668816] [2020-12-22 08:07:47,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:47,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:07:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524718887] [2020-12-22 08:07:47,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:07:47,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:07:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:07:47,008 INFO L87 Difference]: Start difference. First operand 87151 states and 122385 transitions. Second operand 4 states. [2020-12-22 08:07:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:52,724 INFO L93 Difference]: Finished difference Result 162556 states and 228394 transitions. [2020-12-22 08:07:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:52,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-12-22 08:07:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:52,820 INFO L225 Difference]: With dead ends: 162556 [2020-12-22 08:07:52,821 INFO L226 Difference]: Without dead ends: 75463 [2020-12-22 08:07:52,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:07:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75463 states. [2020-12-22 08:07:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75463 to 75463. [2020-12-22 08:07:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75463 states. [2020-12-22 08:07:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75463 states to 75463 states and 106082 transitions. [2020-12-22 08:07:58,779 INFO L78 Accepts]: Start accepts. Automaton has 75463 states and 106082 transitions. Word has length 166 [2020-12-22 08:07:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:58,779 INFO L481 AbstractCegarLoop]: Abstraction has 75463 states and 106082 transitions. [2020-12-22 08:07:58,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:07:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 75463 states and 106082 transitions. [2020-12-22 08:07:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:07:58,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:58,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:07:58,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:07:58,813 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash 249541113, now seen corresponding path program 1 times [2020-12-22 08:07:58,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:58,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894124328] [2020-12-22 08:07:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:58,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894124328] [2020-12-22 08:07:58,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:58,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:58,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296807989] [2020-12-22 08:07:58,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:58,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:58,911 INFO L87 Difference]: Start difference. First operand 75463 states and 106082 transitions. Second operand 3 states. [2020-12-22 08:08:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:08,611 INFO L93 Difference]: Finished difference Result 191841 states and 272051 transitions. [2020-12-22 08:08:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:08:08,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:08:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:08,790 INFO L225 Difference]: With dead ends: 191841 [2020-12-22 08:08:08,790 INFO L226 Difference]: Without dead ends: 135395 [2020-12-22 08:08:08,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:08:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135395 states. [2020-12-22 08:08:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135395 to 135393. [2020-12-22 08:08:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135393 states. [2020-12-22 08:08:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135393 states to 135393 states and 189753 transitions. [2020-12-22 08:08:19,316 INFO L78 Accepts]: Start accepts. Automaton has 135393 states and 189753 transitions. Word has length 172 [2020-12-22 08:08:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:19,316 INFO L481 AbstractCegarLoop]: Abstraction has 135393 states and 189753 transitions. [2020-12-22 08:08:19,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:08:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 135393 states and 189753 transitions. [2020-12-22 08:08:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:08:19,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:19,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:08:19,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:08:19,390 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1999397218, now seen corresponding path program 1 times [2020-12-22 08:08:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:19,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858679289] [2020-12-22 08:08:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:19,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858679289] [2020-12-22 08:08:19,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:19,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174532809] [2020-12-22 08:08:19,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:19,555 INFO L87 Difference]: Start difference. First operand 135393 states and 189753 transitions. Second operand 4 states. [2020-12-22 08:08:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:08:29,785 INFO L93 Difference]: Finished difference Result 261739 states and 366725 transitions. [2020-12-22 08:08:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:08:29,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-12-22 08:08:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:08:29,979 INFO L225 Difference]: With dead ends: 261739 [2020-12-22 08:08:29,979 INFO L226 Difference]: Without dead ends: 126824 [2020-12-22 08:08:30,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:08:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126824 states. [2020-12-22 08:08:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126824 to 126664. [2020-12-22 08:08:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126664 states. [2020-12-22 08:08:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126664 states to 126664 states and 177322 transitions. [2020-12-22 08:08:40,845 INFO L78 Accepts]: Start accepts. Automaton has 126664 states and 177322 transitions. Word has length 172 [2020-12-22 08:08:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:08:40,845 INFO L481 AbstractCegarLoop]: Abstraction has 126664 states and 177322 transitions. [2020-12-22 08:08:40,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:08:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 126664 states and 177322 transitions. [2020-12-22 08:08:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 08:08:40,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:08:40,904 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] [2020-12-22 08:08:40,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:08:40,904 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:08:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:08:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1276560275, now seen corresponding path program 1 times [2020-12-22 08:08:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:08:40,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022298447] [2020-12-22 08:08:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:08:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:08:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:08:41,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022298447] [2020-12-22 08:08:41,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:08:41,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:08:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384115091] [2020-12-22 08:08:41,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:08:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:08:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:08:41,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:08:41,058 INFO L87 Difference]: Start difference. First operand 126664 states and 177322 transitions. Second operand 4 states.