/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:25:33,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:25:33,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:25:33,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:25:33,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:25:33,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:25:33,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:25:33,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:25:33,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:25:33,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:25:33,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:25:33,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:25:33,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:25:33,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:25:33,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:25:33,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:25:33,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:25:33,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:25:33,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:25:33,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:25:33,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:25:33,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:25:33,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:25:33,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:25:33,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:25:33,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:25:33,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:25:33,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:25:33,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:25:33,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:25:33,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:25:33,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:25:33,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:25:33,341 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:25:33,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:25:33,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:25:33,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:25:33,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:25:33,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:25:33,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:25:33,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:25:33,344 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:25:33,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:25:33,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:25:33,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:25:33,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:25:33,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:25:33,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:25:33,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:25:33,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:25:33,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:25:33,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:25:33,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:25:33,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:25:33,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:25:33,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:25:33,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:25:33,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:25:33,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:25:33,818 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:25:33,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:33,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec8ef53d7/dddd4c3366eb4b119ca5386b38b822a4/FLAG66109a5e3 [2020-12-22 07:25:34,572 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:25:34,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:34,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec8ef53d7/dddd4c3366eb4b119ca5386b38b822a4/FLAG66109a5e3 [2020-12-22 07:25:34,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec8ef53d7/dddd4c3366eb4b119ca5386b38b822a4 [2020-12-22 07:25:34,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:25:34,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:25:34,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:25:34,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:25:34,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:25:34,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:25:34" (1/1) ... [2020-12-22 07:25:34,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7584fed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:34, skipping insertion in model container [2020-12-22 07:25:34,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:25:34" (1/1) ... [2020-12-22 07:25:34,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:25:34,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:25:35,593 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.UNBOUNDED.pals.c[61123,61136] [2020-12-22 07:25:35,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:25:35,615 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:25:35,714 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.ufo.UNBOUNDED.pals.c[61123,61136] [2020-12-22 07:25:35,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:25:35,737 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:25:35,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35 WrapperNode [2020-12-22 07:25:35,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:25:35,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:25:35,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:25:35,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:25:35,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:25:35,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:25:35,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:25:35,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:25:35,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:35,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... [2020-12-22 07:25:36,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:25:36,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:25:36,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:25:36,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:25:36,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:25:36,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:25:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:25:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:25:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:25:38,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:25:38,317 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:25:38,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:25:38 BoogieIcfgContainer [2020-12-22 07:25:38,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:25:38,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:25:38,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:25:38,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:25:38,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:25:34" (1/3) ... [2020-12-22 07:25:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9cce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:25:38, skipping insertion in model container [2020-12-22 07:25:38,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35" (2/3) ... [2020-12-22 07:25:38,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be9cce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:25:38, skipping insertion in model container [2020-12-22 07:25:38,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:25:38" (3/3) ... [2020-12-22 07:25:38,330 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:38,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:25:38,343 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:25:38,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:25:38,394 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:25:38,394 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:25:38,394 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:25:38,394 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:25:38,394 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:25:38,394 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:25:38,395 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:25:38,395 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:25:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states. [2020-12-22 07:25:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:25:38,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:38,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:38,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1253378061, now seen corresponding path program 1 times [2020-12-22 07:25:38,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:38,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747954559] [2020-12-22 07:25:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:39,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747954559] [2020-12-22 07:25:39,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:39,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:25:39,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088936380] [2020-12-22 07:25:39,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:25:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:25:39,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:25:39,128 INFO L87 Difference]: Start difference. First operand 715 states. Second operand 2 states. [2020-12-22 07:25:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:39,199 INFO L93 Difference]: Finished difference Result 881 states and 1605 transitions. [2020-12-22 07:25:39,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:25:39,201 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:25:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:39,225 INFO L225 Difference]: With dead ends: 881 [2020-12-22 07:25:39,226 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:25:39,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:25:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:25:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:25:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:25:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1310 transitions. [2020-12-22 07:25:39,340 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1310 transitions. Word has length 153 [2020-12-22 07:25:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:39,342 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1310 transitions. [2020-12-22 07:25:39,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:25:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1310 transitions. [2020-12-22 07:25:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:25:39,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:39,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:39,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:25:39,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 743904971, now seen corresponding path program 1 times [2020-12-22 07:25:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:39,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601362556] [2020-12-22 07:25:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:39,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601362556] [2020-12-22 07:25:39,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:39,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:25:39,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925847903] [2020-12-22 07:25:39,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:25:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:25:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:39,569 INFO L87 Difference]: Start difference. First operand 711 states and 1310 transitions. Second operand 5 states. [2020-12-22 07:25:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:39,762 INFO L93 Difference]: Finished difference Result 880 states and 1598 transitions. [2020-12-22 07:25:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:25:39,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:25:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:39,771 INFO L225 Difference]: With dead ends: 880 [2020-12-22 07:25:39,771 INFO L226 Difference]: Without dead ends: 711 [2020-12-22 07:25:39,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:25:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-22 07:25:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 711. [2020-12-22 07:25:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2020-12-22 07:25:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1250 transitions. [2020-12-22 07:25:39,829 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1250 transitions. Word has length 153 [2020-12-22 07:25:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:39,830 INFO L481 AbstractCegarLoop]: Abstraction has 711 states and 1250 transitions. [2020-12-22 07:25:39,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:25:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1250 transitions. [2020-12-22 07:25:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:25:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:39,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:39,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:25:39,835 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash 323732946, now seen corresponding path program 1 times [2020-12-22 07:25:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:39,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344024767] [2020-12-22 07:25:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:40,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344024767] [2020-12-22 07:25:40,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:40,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:40,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675556160] [2020-12-22 07:25:40,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:40,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:40,234 INFO L87 Difference]: Start difference. First operand 711 states and 1250 transitions. Second operand 3 states. [2020-12-22 07:25:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:40,342 INFO L93 Difference]: Finished difference Result 1028 states and 1793 transitions. [2020-12-22 07:25:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:40,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:25:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:40,350 INFO L225 Difference]: With dead ends: 1028 [2020-12-22 07:25:40,350 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 07:25:40,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 07:25:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 860. [2020-12-22 07:25:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 07:25:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1501 transitions. [2020-12-22 07:25:40,383 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1501 transitions. Word has length 212 [2020-12-22 07:25:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:40,384 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1501 transitions. [2020-12-22 07:25:40,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1501 transitions. [2020-12-22 07:25:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:25:40,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:40,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:40,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:25:40,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1975826350, now seen corresponding path program 1 times [2020-12-22 07:25:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:40,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317226018] [2020-12-22 07:25:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:40,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317226018] [2020-12-22 07:25:40,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:40,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:40,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572275831] [2020-12-22 07:25:40,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:40,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:40,664 INFO L87 Difference]: Start difference. First operand 860 states and 1501 transitions. Second operand 3 states. [2020-12-22 07:25:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:40,720 INFO L93 Difference]: Finished difference Result 1466 states and 2529 transitions. [2020-12-22 07:25:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:40,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:25:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:40,729 INFO L225 Difference]: With dead ends: 1466 [2020-12-22 07:25:40,729 INFO L226 Difference]: Without dead ends: 1152 [2020-12-22 07:25:40,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2020-12-22 07:25:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1148. [2020-12-22 07:25:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2020-12-22 07:25:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1987 transitions. [2020-12-22 07:25:40,807 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1987 transitions. Word has length 216 [2020-12-22 07:25:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:40,807 INFO L481 AbstractCegarLoop]: Abstraction has 1148 states and 1987 transitions. [2020-12-22 07:25:40,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1987 transitions. [2020-12-22 07:25:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:25:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:40,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:40,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:25:40,814 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 194635210, now seen corresponding path program 1 times [2020-12-22 07:25:40,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:40,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189207710] [2020-12-22 07:25:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:41,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189207710] [2020-12-22 07:25:41,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:41,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:41,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478799425] [2020-12-22 07:25:41,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:41,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:41,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,055 INFO L87 Difference]: Start difference. First operand 1148 states and 1987 transitions. Second operand 3 states. [2020-12-22 07:25:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,137 INFO L93 Difference]: Finished difference Result 2308 states and 3945 transitions. [2020-12-22 07:25:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:41,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:25:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:41,150 INFO L225 Difference]: With dead ends: 2308 [2020-12-22 07:25:41,150 INFO L226 Difference]: Without dead ends: 1706 [2020-12-22 07:25:41,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-12-22 07:25:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1700. [2020-12-22 07:25:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1700 states. [2020-12-22 07:25:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2911 transitions. [2020-12-22 07:25:41,246 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2911 transitions. Word has length 220 [2020-12-22 07:25:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:41,247 INFO L481 AbstractCegarLoop]: Abstraction has 1700 states and 2911 transitions. [2020-12-22 07:25:41,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2911 transitions. [2020-12-22 07:25:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:25:41,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:41,252 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:41,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:25:41,253 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1875750874, now seen corresponding path program 1 times [2020-12-22 07:25:41,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:41,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180312011] [2020-12-22 07:25:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:41,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180312011] [2020-12-22 07:25:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:41,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608319607] [2020-12-22 07:25:41,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:41,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:41,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,560 INFO L87 Difference]: Start difference. First operand 1700 states and 2911 transitions. Second operand 3 states. [2020-12-22 07:25:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,670 INFO L93 Difference]: Finished difference Result 3920 states and 6633 transitions. [2020-12-22 07:25:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:41,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:25:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:41,692 INFO L225 Difference]: With dead ends: 3920 [2020-12-22 07:25:41,693 INFO L226 Difference]: Without dead ends: 2766 [2020-12-22 07:25:41,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2020-12-22 07:25:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2756. [2020-12-22 07:25:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2756 states. [2020-12-22 07:25:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4663 transitions. [2020-12-22 07:25:41,887 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4663 transitions. Word has length 224 [2020-12-22 07:25:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:41,888 INFO L481 AbstractCegarLoop]: Abstraction has 2756 states and 4663 transitions. [2020-12-22 07:25:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4663 transitions. [2020-12-22 07:25:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:25:41,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:41,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:41,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:25:41,899 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash 325314, now seen corresponding path program 1 times [2020-12-22 07:25:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:41,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042007511] [2020-12-22 07:25:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:42,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042007511] [2020-12-22 07:25:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823447074] [2020-12-22 07:25:42,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:42,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:42,249 INFO L87 Difference]: Start difference. First operand 2756 states and 4663 transitions. Second operand 3 states. [2020-12-22 07:25:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:42,367 INFO L93 Difference]: Finished difference Result 7000 states and 11721 transitions. [2020-12-22 07:25:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:42,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:25:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:42,397 INFO L225 Difference]: With dead ends: 7000 [2020-12-22 07:25:42,397 INFO L226 Difference]: Without dead ends: 4790 [2020-12-22 07:25:42,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2020-12-22 07:25:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4772. [2020-12-22 07:25:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4772 states. [2020-12-22 07:25:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 7975 transitions. [2020-12-22 07:25:42,611 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 7975 transitions. Word has length 228 [2020-12-22 07:25:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:42,612 INFO L481 AbstractCegarLoop]: Abstraction has 4772 states and 7975 transitions. [2020-12-22 07:25:42,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 7975 transitions. [2020-12-22 07:25:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:25:42,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:42,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:42,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:25:42,618 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1486412190, now seen corresponding path program 1 times [2020-12-22 07:25:42,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:42,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660346785] [2020-12-22 07:25:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660346785] [2020-12-22 07:25:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:25:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153842440] [2020-12-22 07:25:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:25:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:25:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:25:42,944 INFO L87 Difference]: Start difference. First operand 4772 states and 7975 transitions. Second operand 7 states. [2020-12-22 07:25:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:43,840 INFO L93 Difference]: Finished difference Result 26566 states and 44464 transitions. [2020-12-22 07:25:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:25:43,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:25:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:43,949 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 07:25:43,949 INFO L226 Difference]: Without dead ends: 22340 [2020-12-22 07:25:43,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:25:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22340 states. [2020-12-22 07:25:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22340 to 10944. [2020-12-22 07:25:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10944 states. [2020-12-22 07:25:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 18278 transitions. [2020-12-22 07:25:44,551 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 18278 transitions. Word has length 232 [2020-12-22 07:25:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:44,552 INFO L481 AbstractCegarLoop]: Abstraction has 10944 states and 18278 transitions. [2020-12-22 07:25:44,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:25:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 18278 transitions. [2020-12-22 07:25:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:44,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:44,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:44,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:25:44,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 862725536, now seen corresponding path program 1 times [2020-12-22 07:25:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:44,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153134379] [2020-12-22 07:25:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:44,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153134379] [2020-12-22 07:25:44,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:44,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:44,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281400692] [2020-12-22 07:25:44,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:44,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:44,864 INFO L87 Difference]: Start difference. First operand 10944 states and 18278 transitions. Second operand 4 states. [2020-12-22 07:25:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:45,313 INFO L93 Difference]: Finished difference Result 25679 states and 42893 transitions. [2020-12-22 07:25:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:45,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:25:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:45,353 INFO L225 Difference]: With dead ends: 25679 [2020-12-22 07:25:45,354 INFO L226 Difference]: Without dead ends: 15281 [2020-12-22 07:25:45,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15281 states. [2020-12-22 07:25:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15281 to 15246. [2020-12-22 07:25:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15246 states. [2020-12-22 07:25:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 25455 transitions. [2020-12-22 07:25:45,878 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 25455 transitions. Word has length 233 [2020-12-22 07:25:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:45,879 INFO L481 AbstractCegarLoop]: Abstraction has 15246 states and 25455 transitions. [2020-12-22 07:25:45,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 25455 transitions. [2020-12-22 07:25:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:25:45,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:45,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:45,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:25:45,892 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1122687211, now seen corresponding path program 1 times [2020-12-22 07:25:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:45,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176128588] [2020-12-22 07:25:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:46,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176128588] [2020-12-22 07:25:46,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:46,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:46,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225238623] [2020-12-22 07:25:46,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:46,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:46,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:46,209 INFO L87 Difference]: Start difference. First operand 15246 states and 25455 transitions. Second operand 4 states. [2020-12-22 07:25:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:46,793 INFO L93 Difference]: Finished difference Result 45284 states and 75706 transitions. [2020-12-22 07:25:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:46,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:25:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:46,869 INFO L225 Difference]: With dead ends: 45284 [2020-12-22 07:25:46,870 INFO L226 Difference]: Without dead ends: 30584 [2020-12-22 07:25:46,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30584 states. [2020-12-22 07:25:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30584 to 22679. [2020-12-22 07:25:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22679 states. [2020-12-22 07:25:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22679 states to 22679 states and 37827 transitions. [2020-12-22 07:25:47,666 INFO L78 Accepts]: Start accepts. Automaton has 22679 states and 37827 transitions. Word has length 234 [2020-12-22 07:25:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:47,667 INFO L481 AbstractCegarLoop]: Abstraction has 22679 states and 37827 transitions. [2020-12-22 07:25:47,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22679 states and 37827 transitions. [2020-12-22 07:25:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:47,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:47,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:25:47,683 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2140950537, now seen corresponding path program 1 times [2020-12-22 07:25:47,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:47,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504483744] [2020-12-22 07:25:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:47,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504483744] [2020-12-22 07:25:47,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:47,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:47,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667147574] [2020-12-22 07:25:47,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:47,853 INFO L87 Difference]: Start difference. First operand 22679 states and 37827 transitions. Second operand 3 states. [2020-12-22 07:25:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:48,745 INFO L93 Difference]: Finished difference Result 52304 states and 87469 transitions. [2020-12-22 07:25:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:48,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:48,852 INFO L225 Difference]: With dead ends: 52304 [2020-12-22 07:25:48,852 INFO L226 Difference]: Without dead ends: 35949 [2020-12-22 07:25:48,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35949 states. [2020-12-22 07:25:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35949 to 35947. [2020-12-22 07:25:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35947 states. [2020-12-22 07:25:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35947 states to 35947 states and 59851 transitions. [2020-12-22 07:25:50,073 INFO L78 Accepts]: Start accepts. Automaton has 35947 states and 59851 transitions. Word has length 235 [2020-12-22 07:25:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:50,074 INFO L481 AbstractCegarLoop]: Abstraction has 35947 states and 59851 transitions. [2020-12-22 07:25:50,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 35947 states and 59851 transitions. [2020-12-22 07:25:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:50,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:50,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:50,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:25:50,081 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1580766843, now seen corresponding path program 1 times [2020-12-22 07:25:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:50,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302519243] [2020-12-22 07:25:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:50,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302519243] [2020-12-22 07:25:50,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:50,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:50,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360974495] [2020-12-22 07:25:50,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:50,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:50,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:50,388 INFO L87 Difference]: Start difference. First operand 35947 states and 59851 transitions. Second operand 3 states. [2020-12-22 07:25:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:51,321 INFO L93 Difference]: Finished difference Result 70304 states and 117205 transitions. [2020-12-22 07:25:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:51,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:51,427 INFO L225 Difference]: With dead ends: 70304 [2020-12-22 07:25:51,428 INFO L226 Difference]: Without dead ends: 51206 [2020-12-22 07:25:51,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51206 states. [2020-12-22 07:25:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51206 to 51204. [2020-12-22 07:25:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51204 states. [2020-12-22 07:25:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51204 states to 51204 states and 85035 transitions. [2020-12-22 07:25:52,974 INFO L78 Accepts]: Start accepts. Automaton has 51204 states and 85035 transitions. Word has length 235 [2020-12-22 07:25:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:52,975 INFO L481 AbstractCegarLoop]: Abstraction has 51204 states and 85035 transitions. [2020-12-22 07:25:52,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 51204 states and 85035 transitions. [2020-12-22 07:25:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:52,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:52,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:52,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:25:52,982 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1900282093, now seen corresponding path program 1 times [2020-12-22 07:25:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:52,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379566035] [2020-12-22 07:25:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379566035] [2020-12-22 07:25:53,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:53,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:53,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734949141] [2020-12-22 07:25:53,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:53,226 INFO L87 Difference]: Start difference. First operand 51204 states and 85035 transitions. Second operand 3 states. [2020-12-22 07:25:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:54,369 INFO L93 Difference]: Finished difference Result 99832 states and 166071 transitions. [2020-12-22 07:25:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:54,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:25:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:54,488 INFO L225 Difference]: With dead ends: 99832 [2020-12-22 07:25:54,489 INFO L226 Difference]: Without dead ends: 72694 [2020-12-22 07:25:54,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72694 states. [2020-12-22 07:25:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72694 to 72692. [2020-12-22 07:25:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72692 states. [2020-12-22 07:25:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72692 states to 72692 states and 120401 transitions. [2020-12-22 07:25:56,472 INFO L78 Accepts]: Start accepts. Automaton has 72692 states and 120401 transitions. Word has length 235 [2020-12-22 07:25:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:56,477 INFO L481 AbstractCegarLoop]: Abstraction has 72692 states and 120401 transitions. [2020-12-22 07:25:56,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 72692 states and 120401 transitions. [2020-12-22 07:25:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:25:56,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:56,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:25:56,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:25:56,500 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:56,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1923031415, now seen corresponding path program 1 times [2020-12-22 07:25:56,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:56,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672144932] [2020-12-22 07:25:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:56,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672144932] [2020-12-22 07:25:56,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:56,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:56,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227045047] [2020-12-22 07:25:56,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:56,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:56,693 INFO L87 Difference]: Start difference. First operand 72692 states and 120401 transitions. Second operand 4 states. [2020-12-22 07:25:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:59,190 INFO L93 Difference]: Finished difference Result 237257 states and 393670 transitions. [2020-12-22 07:25:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:59,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:25:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:59,651 INFO L225 Difference]: With dead ends: 237257 [2020-12-22 07:25:59,651 INFO L226 Difference]: Without dead ends: 165360 [2020-12-22 07:25:59,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165360 states. [2020-12-22 07:26:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165360 to 118818. [2020-12-22 07:26:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118818 states. [2020-12-22 07:26:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118818 states to 118818 states and 196479 transitions. [2020-12-22 07:26:03,026 INFO L78 Accepts]: Start accepts. Automaton has 118818 states and 196479 transitions. Word has length 235 [2020-12-22 07:26:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:03,027 INFO L481 AbstractCegarLoop]: Abstraction has 118818 states and 196479 transitions. [2020-12-22 07:26:03,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 118818 states and 196479 transitions. [2020-12-22 07:26:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:26:03,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:03,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:03,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:26:03,030 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash 568583988, now seen corresponding path program 1 times [2020-12-22 07:26:03,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:03,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127721537] [2020-12-22 07:26:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:03,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127721537] [2020-12-22 07:26:03,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:03,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:26:03,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238893081] [2020-12-22 07:26:03,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:26:03,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:26:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:26:03,189 INFO L87 Difference]: Start difference. First operand 118818 states and 196479 transitions. Second operand 3 states. [2020-12-22 07:26:05,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:05,870 INFO L93 Difference]: Finished difference Result 231880 states and 384221 transitions. [2020-12-22 07:26:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:26:05,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:26:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:06,146 INFO L225 Difference]: With dead ends: 231880 [2020-12-22 07:26:06,146 INFO L226 Difference]: Without dead ends: 167993 [2020-12-22 07:26:06,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:26:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167993 states. [2020-12-22 07:26:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167993 to 167991. [2020-12-22 07:26:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167991 states. [2020-12-22 07:26:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167991 states to 167991 states and 277009 transitions. [2020-12-22 07:26:10,452 INFO L78 Accepts]: Start accepts. Automaton has 167991 states and 277009 transitions. Word has length 235 [2020-12-22 07:26:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:10,455 INFO L481 AbstractCegarLoop]: Abstraction has 167991 states and 277009 transitions. [2020-12-22 07:26:10,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:26:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 167991 states and 277009 transitions. [2020-12-22 07:26:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:26:10,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:10,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:10,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:26:10,477 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash -311882046, now seen corresponding path program 1 times [2020-12-22 07:26:10,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:10,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261936427] [2020-12-22 07:26:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:10,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261936427] [2020-12-22 07:26:10,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:10,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:26:10,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154136960] [2020-12-22 07:26:10,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:26:10,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:10,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:26:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:26:10,697 INFO L87 Difference]: Start difference. First operand 167991 states and 277009 transitions. Second operand 3 states. [2020-12-22 07:26:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:14,976 INFO L93 Difference]: Finished difference Result 371939 states and 613964 transitions. [2020-12-22 07:26:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:26:14,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2020-12-22 07:26:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:15,489 INFO L225 Difference]: With dead ends: 371939 [2020-12-22 07:26:15,489 INFO L226 Difference]: Without dead ends: 255733 [2020-12-22 07:26:15,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:26:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255733 states. [2020-12-22 07:26:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255733 to 255731. [2020-12-22 07:26:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255731 states. [2020-12-22 07:26:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255731 states to 255731 states and 419742 transitions. [2020-12-22 07:26:22,344 INFO L78 Accepts]: Start accepts. Automaton has 255731 states and 419742 transitions. Word has length 235 [2020-12-22 07:26:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:22,345 INFO L481 AbstractCegarLoop]: Abstraction has 255731 states and 419742 transitions. [2020-12-22 07:26:22,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:26:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 255731 states and 419742 transitions. [2020-12-22 07:26:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:26:22,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:22,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:22,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:26:22,348 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2020032652, now seen corresponding path program 1 times [2020-12-22 07:26:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:22,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617038949] [2020-12-22 07:26:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:22,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617038949] [2020-12-22 07:26:22,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:22,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731857282] [2020-12-22 07:26:22,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:22,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:22,540 INFO L87 Difference]: Start difference. First operand 255731 states and 419742 transitions. Second operand 4 states. [2020-12-22 07:26:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:32,080 INFO L93 Difference]: Finished difference Result 837752 states and 1377930 transitions. [2020-12-22 07:26:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:32,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:26:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:33,527 INFO L225 Difference]: With dead ends: 837752 [2020-12-22 07:26:33,527 INFO L226 Difference]: Without dead ends: 582633 [2020-12-22 07:26:33,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:26:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582633 states. [2020-12-22 07:26:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582633 to 418325. [2020-12-22 07:26:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418325 states. [2020-12-22 07:26:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418325 states to 418325 states and 685221 transitions. [2020-12-22 07:26:47,146 INFO L78 Accepts]: Start accepts. Automaton has 418325 states and 685221 transitions. Word has length 236 [2020-12-22 07:26:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:47,146 INFO L481 AbstractCegarLoop]: Abstraction has 418325 states and 685221 transitions. [2020-12-22 07:26:47,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 418325 states and 685221 transitions. [2020-12-22 07:26:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:26:47,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:47,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:26:47,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:26:47,153 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash 901108046, now seen corresponding path program 1 times [2020-12-22 07:26:47,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:47,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039267274] [2020-12-22 07:26:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039267274] [2020-12-22 07:26:47,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:47,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021597501] [2020-12-22 07:26:47,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:47,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:47,512 INFO L87 Difference]: Start difference. First operand 418325 states and 685221 transitions. Second operand 4 states. [2020-12-22 07:27:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:07,577 INFO L93 Difference]: Finished difference Result 1356096 states and 2226004 transitions. [2020-12-22 07:27:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:27:07,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:27:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:10,052 INFO L225 Difference]: With dead ends: 1356096 [2020-12-22 07:27:10,052 INFO L226 Difference]: Without dead ends: 938383 [2020-12-22 07:27:10,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:27:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938383 states. [2020-12-22 07:27:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938383 to 676987. [2020-12-22 07:27:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:27:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1106708 transitions. [2020-12-22 07:27:37,923 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1106708 transitions. Word has length 237 [2020-12-22 07:27:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:37,924 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1106708 transitions. [2020-12-22 07:27:37,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:27:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1106708 transitions. [2020-12-22 07:27:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:27:37,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:37,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:37,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:27:37,944 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash 371666150, now seen corresponding path program 1 times [2020-12-22 07:27:37,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:37,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897937514] [2020-12-22 07:27:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897937514] [2020-12-22 07:27:39,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:39,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:39,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632489235] [2020-12-22 07:27:39,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:39,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:39,281 INFO L87 Difference]: Start difference. First operand 676987 states and 1106708 transitions. Second operand 7 states. [2020-12-22 07:27:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:58,335 INFO L93 Difference]: Finished difference Result 1353366 states and 2212354 transitions. [2020-12-22 07:27:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:27:58,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:27:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:00,056 INFO L225 Difference]: With dead ends: 1353366 [2020-12-22 07:28:00,056 INFO L226 Difference]: Without dead ends: 676991 [2020-12-22 07:28:00,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:28:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676991 states. [2020-12-22 07:28:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676991 to 676987. [2020-12-22 07:28:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676987 states. [2020-12-22 07:28:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676987 states to 676987 states and 1103583 transitions. [2020-12-22 07:28:21,697 INFO L78 Accepts]: Start accepts. Automaton has 676987 states and 1103583 transitions. Word has length 239 [2020-12-22 07:28:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:21,698 INFO L481 AbstractCegarLoop]: Abstraction has 676987 states and 1103583 transitions. [2020-12-22 07:28:21,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:28:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 676987 states and 1103583 transitions. [2020-12-22 07:28:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:28:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:21,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:21,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:28:21,701 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 379198031, now seen corresponding path program 1 times [2020-12-22 07:28:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:21,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259434257] [2020-12-22 07:28:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259434257] [2020-12-22 07:28:22,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:22,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:28:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698683172] [2020-12-22 07:28:22,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:22,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:22,352 INFO L87 Difference]: Start difference. First operand 676987 states and 1103583 transitions. Second operand 7 states.