/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_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:25:33,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:25:33,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:25:33,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:25:33,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:25:33,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:25:33,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:25:33,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:25:33,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:25:33,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:25:33,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:25:33,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:25:33,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:25:33,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:25:33,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:25:33,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:25:33,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:25:33,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:25:33,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:25:33,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:25:33,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:25:33,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:25:33,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:25:33,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:25:33,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:25:33,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:25:33,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:25:33,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:25:33,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:25:33,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:25:33,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:25:33,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:25:33,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:25:33,251 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:25:33,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:25:33,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:25:33,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:25:33,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:25:33,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:25:33,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:25:33,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:25:33,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:25:33,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:25:33,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:25:33,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:25:33,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:25:33,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:25:33,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:25:33,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:25:33,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:25:33,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:25:33,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:25:33,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:25:33,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:25:33,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:25:33,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:25:33,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:25:33,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:25:33,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:25:33,749 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:25:33,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:33,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd720f2e/5d249a45388b46fbb97a128b8e531410/FLAG5c48c727b [2020-12-22 07:25:34,619 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:25:34,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:34,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd720f2e/5d249a45388b46fbb97a128b8e531410/FLAG5c48c727b [2020-12-22 07:25:34,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd720f2e/5d249a45388b46fbb97a128b8e531410 [2020-12-22 07:25:34,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:25:34,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:25:34,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:25:34,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:25:34,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:25:34,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:25:34" (1/1) ... [2020-12-22 07:25:34,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329b9c67 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 07:25:34,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:25:34" (1/1) ... [2020-12-22 07:25:34,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:25:34,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:25:35,481 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_overflow.ufo.UNBOUNDED.pals.c[61047,61060] [2020-12-22 07:25:35,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:25:35,518 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:25:35,716 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_overflow.ufo.UNBOUNDED.pals.c[61047,61060] [2020-12-22 07:25:35,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:25:35,741 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:25:35,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:25:35 WrapperNode [2020-12-22 07:25:35,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:25:35,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:25:35,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:25:35,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:25:35,752 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 07:25:35,778 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 07:25:35,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:25:35,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:25:35,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:25:35,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:25:35,911 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 07:25:35,912 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 07:25:35,926 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 07:25:35,927 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 07:25:35,984 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 07:25:36,035 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 07:25:36,048 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 07:25:36,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:25:36,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:25:36,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:25:36,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:25:36,069 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 07:25:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:25:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:25:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:25:36,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:25:38,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:25:38,658 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:25:38,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:25:38 BoogieIcfgContainer [2020-12-22 07:25:38,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:25:38,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:25:38,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:25:38,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:25:38,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:25:34" (1/3) ... [2020-12-22 07:25:38,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c404921 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 07:25:38,669 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 07:25:38,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c404921 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 07:25:38,669 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 07:25:38,671 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:25:38,679 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:25:38,686 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:25:38,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:25:38,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:25:38,744 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:25:38,745 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:25:38,745 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:25:38,745 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:25:38,745 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:25:38,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:25:38,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:25:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states. [2020-12-22 07:25:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:25:38,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:38,806 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 07:25:38,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash -745157910, now seen corresponding path program 1 times [2020-12-22 07:25:38,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:38,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770331013] [2020-12-22 07:25:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:39,491 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 07:25:39,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770331013] [2020-12-22 07:25:39,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:39,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:25:39,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664128376] [2020-12-22 07:25:39,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:25:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:25:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:25:39,518 INFO L87 Difference]: Start difference. First operand 705 states. Second operand 2 states. [2020-12-22 07:25:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:39,628 INFO L93 Difference]: Finished difference Result 861 states and 1575 transitions. [2020-12-22 07:25:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:25:39,630 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 153 [2020-12-22 07:25:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:39,669 INFO L225 Difference]: With dead ends: 861 [2020-12-22 07:25:39,669 INFO L226 Difference]: Without dead ends: 701 [2020-12-22 07:25:39,674 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 07:25:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-12-22 07:25:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2020-12-22 07:25:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-12-22 07:25:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1295 transitions. [2020-12-22 07:25:39,778 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1295 transitions. Word has length 153 [2020-12-22 07:25:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:39,780 INFO L481 AbstractCegarLoop]: Abstraction has 701 states and 1295 transitions. [2020-12-22 07:25:39,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:25:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1295 transitions. [2020-12-22 07:25:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 07:25:39,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:39,789 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 07:25:39,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:25:39,789 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:39,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1254631000, now seen corresponding path program 1 times [2020-12-22 07:25:39,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196857201] [2020-12-22 07:25:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:40,098 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 07:25:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196857201] [2020-12-22 07:25:40,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:40,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:25:40,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044034190] [2020-12-22 07:25:40,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:25:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:25:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:40,105 INFO L87 Difference]: Start difference. First operand 701 states and 1295 transitions. Second operand 5 states. [2020-12-22 07:25:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:40,332 INFO L93 Difference]: Finished difference Result 860 states and 1568 transitions. [2020-12-22 07:25:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:25:40,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-12-22 07:25:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:40,349 INFO L225 Difference]: With dead ends: 860 [2020-12-22 07:25:40,350 INFO L226 Difference]: Without dead ends: 701 [2020-12-22 07:25:40,358 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 07:25:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-12-22 07:25:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2020-12-22 07:25:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-12-22 07:25:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1235 transitions. [2020-12-22 07:25:40,434 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1235 transitions. Word has length 153 [2020-12-22 07:25:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:40,435 INFO L481 AbstractCegarLoop]: Abstraction has 701 states and 1235 transitions. [2020-12-22 07:25:40,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:25:40,435 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1235 transitions. [2020-12-22 07:25:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-12-22 07:25:40,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:40,452 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 07:25:40,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:25:40,455 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:40,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1674803025, now seen corresponding path program 1 times [2020-12-22 07:25:40,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:40,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908351604] [2020-12-22 07:25:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:40,965 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 07:25:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908351604] [2020-12-22 07:25:40,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:40,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:40,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121827156] [2020-12-22 07:25:40,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:40,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:40,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:40,982 INFO L87 Difference]: Start difference. First operand 701 states and 1235 transitions. Second operand 3 states. [2020-12-22 07:25:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,070 INFO L93 Difference]: Finished difference Result 998 states and 1748 transitions. [2020-12-22 07:25:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:41,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2020-12-22 07:25:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:41,080 INFO L225 Difference]: With dead ends: 998 [2020-12-22 07:25:41,081 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 07:25:41,083 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 07:25:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 07:25:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 841. [2020-12-22 07:25:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2020-12-22 07:25:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1473 transitions. [2020-12-22 07:25:41,127 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1473 transitions. Word has length 212 [2020-12-22 07:25:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:41,134 INFO L481 AbstractCegarLoop]: Abstraction has 841 states and 1473 transitions. [2020-12-22 07:25:41,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1473 transitions. [2020-12-22 07:25:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 07:25:41,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:41,139 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 07:25:41,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:25:41,140 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:41,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1449767861, now seen corresponding path program 1 times [2020-12-22 07:25:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:41,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811957198] [2020-12-22 07:25:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:41,505 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 07:25:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811957198] [2020-12-22 07:25:41,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:41,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707274039] [2020-12-22 07:25:41,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:41,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,513 INFO L87 Difference]: Start difference. First operand 841 states and 1473 transitions. Second operand 3 states. [2020-12-22 07:25:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,574 INFO L93 Difference]: Finished difference Result 1409 states and 2445 transitions. [2020-12-22 07:25:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:41,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 07:25:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:41,583 INFO L225 Difference]: With dead ends: 1409 [2020-12-22 07:25:41,583 INFO L226 Difference]: Without dead ends: 1114 [2020-12-22 07:25:41,585 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 07:25:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2020-12-22 07:25:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1112. [2020-12-22 07:25:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2020-12-22 07:25:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1935 transitions. [2020-12-22 07:25:41,630 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1935 transitions. Word has length 216 [2020-12-22 07:25:41,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:41,631 INFO L481 AbstractCegarLoop]: Abstraction has 1112 states and 1935 transitions. [2020-12-22 07:25:41,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1935 transitions. [2020-12-22 07:25:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 07:25:41,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:41,637 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 07:25:41,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:25:41,638 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1203576295, now seen corresponding path program 1 times [2020-12-22 07:25:41,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:41,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648405335] [2020-12-22 07:25:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:41,866 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 07:25:41,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648405335] [2020-12-22 07:25:41,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:41,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492881156] [2020-12-22 07:25:41,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:41,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:41,871 INFO L87 Difference]: Start difference. First operand 1112 states and 1935 transitions. Second operand 3 states. [2020-12-22 07:25:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:41,950 INFO L93 Difference]: Finished difference Result 2200 states and 3789 transitions. [2020-12-22 07:25:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:41,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 07:25:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:41,962 INFO L225 Difference]: With dead ends: 2200 [2020-12-22 07:25:41,963 INFO L226 Difference]: Without dead ends: 1634 [2020-12-22 07:25:41,965 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 07:25:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2020-12-22 07:25:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1632. [2020-12-22 07:25:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2020-12-22 07:25:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2815 transitions. [2020-12-22 07:25:42,067 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2815 transitions. Word has length 220 [2020-12-22 07:25:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:42,068 INFO L481 AbstractCegarLoop]: Abstraction has 1632 states and 2815 transitions. [2020-12-22 07:25:42,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2815 transitions. [2020-12-22 07:25:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 07:25:42,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:42,077 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 07:25:42,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:25:42,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1763181181, now seen corresponding path program 1 times [2020-12-22 07:25:42,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:42,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912624300] [2020-12-22 07:25:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:25:42,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912624300] [2020-12-22 07:25:42,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:42,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629170008] [2020-12-22 07:25:42,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:42,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:42,445 INFO L87 Difference]: Start difference. First operand 1632 states and 2815 transitions. Second operand 3 states. [2020-12-22 07:25:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:42,526 INFO L93 Difference]: Finished difference Result 3716 states and 6345 transitions. [2020-12-22 07:25:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:42,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 07:25:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:42,543 INFO L225 Difference]: With dead ends: 3716 [2020-12-22 07:25:42,544 INFO L226 Difference]: Without dead ends: 2630 [2020-12-22 07:25:42,547 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 07:25:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2020-12-22 07:25:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2628. [2020-12-22 07:25:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2020-12-22 07:25:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4487 transitions. [2020-12-22 07:25:42,651 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4487 transitions. Word has length 224 [2020-12-22 07:25:42,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:42,652 INFO L481 AbstractCegarLoop]: Abstraction has 2628 states and 4487 transitions. [2020-12-22 07:25:42,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:42,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4487 transitions. [2020-12-22 07:25:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 07:25:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:42,660 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 07:25:42,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:25:42,660 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1428296929, now seen corresponding path program 1 times [2020-12-22 07:25:42,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:42,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976990970] [2020-12-22 07:25:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:42,998 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 07:25:42,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976990970] [2020-12-22 07:25:42,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:42,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:43,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067402959] [2020-12-22 07:25:43,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:43,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:43,003 INFO L87 Difference]: Start difference. First operand 2628 states and 4487 transitions. Second operand 3 states. [2020-12-22 07:25:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:43,112 INFO L93 Difference]: Finished difference Result 6616 states and 11193 transitions. [2020-12-22 07:25:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:43,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 07:25:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:43,139 INFO L225 Difference]: With dead ends: 6616 [2020-12-22 07:25:43,139 INFO L226 Difference]: Without dead ends: 4534 [2020-12-22 07:25:43,147 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 07:25:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2020-12-22 07:25:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 4532. [2020-12-22 07:25:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4532 states. [2020-12-22 07:25:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 7655 transitions. [2020-12-22 07:25:43,298 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 7655 transitions. Word has length 228 [2020-12-22 07:25:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:43,298 INFO L481 AbstractCegarLoop]: Abstraction has 4532 states and 7655 transitions. [2020-12-22 07:25:43,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 7655 transitions. [2020-12-22 07:25:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-12-22 07:25:43,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:43,306 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 07:25:43,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:25:43,306 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:43,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1256580795, now seen corresponding path program 1 times [2020-12-22 07:25:43,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:43,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891556972] [2020-12-22 07:25:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:43,660 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 07:25:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891556972] [2020-12-22 07:25:43,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:43,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:25:43,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287544517] [2020-12-22 07:25:43,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:25:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:25:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:25:43,663 INFO L87 Difference]: Start difference. First operand 4532 states and 7655 transitions. Second operand 7 states. [2020-12-22 07:25:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:44,558 INFO L93 Difference]: Finished difference Result 25062 states and 42416 transitions. [2020-12-22 07:25:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:25:44,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-12-22 07:25:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:44,679 INFO L225 Difference]: With dead ends: 25062 [2020-12-22 07:25:44,680 INFO L226 Difference]: Without dead ends: 21076 [2020-12-22 07:25:44,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:25:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21076 states. [2020-12-22 07:25:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21076 to 10347. [2020-12-22 07:25:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10347 states. [2020-12-22 07:25:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 17474 transitions. [2020-12-22 07:25:45,349 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 17474 transitions. Word has length 232 [2020-12-22 07:25:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:45,350 INFO L481 AbstractCegarLoop]: Abstraction has 10347 states and 17474 transitions. [2020-12-22 07:25:45,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:25:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 17474 transitions. [2020-12-22 07:25:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:45,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:45,363 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 07:25:45,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:25:45,363 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1967080448, now seen corresponding path program 1 times [2020-12-22 07:25:45,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:45,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574354742] [2020-12-22 07:25:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:45,689 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 07:25:45,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574354742] [2020-12-22 07:25:45,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:45,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111224504] [2020-12-22 07:25:45,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:45,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:45,692 INFO L87 Difference]: Start difference. First operand 10347 states and 17474 transitions. Second operand 4 states. [2020-12-22 07:25:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:46,194 INFO L93 Difference]: Finished difference Result 24235 states and 40940 transitions. [2020-12-22 07:25:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:46,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2020-12-22 07:25:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:46,228 INFO L225 Difference]: With dead ends: 24235 [2020-12-22 07:25:46,229 INFO L226 Difference]: Without dead ends: 14434 [2020-12-22 07:25:46,244 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 07:25:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14434 states. [2020-12-22 07:25:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14434 to 14399. [2020-12-22 07:25:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14399 states. [2020-12-22 07:25:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14399 states to 14399 states and 24306 transitions. [2020-12-22 07:25:46,934 INFO L78 Accepts]: Start accepts. Automaton has 14399 states and 24306 transitions. Word has length 233 [2020-12-22 07:25:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:46,935 INFO L481 AbstractCegarLoop]: Abstraction has 14399 states and 24306 transitions. [2020-12-22 07:25:46,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 14399 states and 24306 transitions. [2020-12-22 07:25:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:46,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:46,949 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 07:25:46,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:25:46,950 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 159533448, now seen corresponding path program 1 times [2020-12-22 07:25:46,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:46,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018653612] [2020-12-22 07:25:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:47,345 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 07:25:47,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018653612] [2020-12-22 07:25:47,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:47,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153529484] [2020-12-22 07:25:47,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:47,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:47,349 INFO L87 Difference]: Start difference. First operand 14399 states and 24306 transitions. Second operand 3 states. [2020-12-22 07:25:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:47,846 INFO L93 Difference]: Finished difference Result 29003 states and 48972 transitions. [2020-12-22 07:25:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:47,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:47,907 INFO L225 Difference]: With dead ends: 29003 [2020-12-22 07:25:47,907 INFO L226 Difference]: Without dead ends: 21613 [2020-12-22 07:25:47,930 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 07:25:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21613 states. [2020-12-22 07:25:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21613 to 21611. [2020-12-22 07:25:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21611 states. [2020-12-22 07:25:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21611 states to 21611 states and 36325 transitions. [2020-12-22 07:25:48,825 INFO L78 Accepts]: Start accepts. Automaton has 21611 states and 36325 transitions. Word has length 233 [2020-12-22 07:25:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:48,826 INFO L481 AbstractCegarLoop]: Abstraction has 21611 states and 36325 transitions. [2020-12-22 07:25:48,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 21611 states and 36325 transitions. [2020-12-22 07:25:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:48,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:48,837 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 07:25:48,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:25:48,838 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:48,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2066182408, now seen corresponding path program 1 times [2020-12-22 07:25:48,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:48,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068326204] [2020-12-22 07:25:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:49,136 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 07:25:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068326204] [2020-12-22 07:25:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:49,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199232131] [2020-12-22 07:25:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:49,141 INFO L87 Difference]: Start difference. First operand 21611 states and 36325 transitions. Second operand 3 states. [2020-12-22 07:25:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:49,808 INFO L93 Difference]: Finished difference Result 40587 states and 68335 transitions. [2020-12-22 07:25:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:49,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:49,876 INFO L225 Difference]: With dead ends: 40587 [2020-12-22 07:25:49,877 INFO L226 Difference]: Without dead ends: 29715 [2020-12-22 07:25:49,899 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 07:25:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29715 states. [2020-12-22 07:25:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29715 to 29713. [2020-12-22 07:25:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29713 states. [2020-12-22 07:25:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29713 states to 29713 states and 49788 transitions. [2020-12-22 07:25:50,990 INFO L78 Accepts]: Start accepts. Automaton has 29713 states and 49788 transitions. Word has length 233 [2020-12-22 07:25:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:50,991 INFO L481 AbstractCegarLoop]: Abstraction has 29713 states and 49788 transitions. [2020-12-22 07:25:50,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 29713 states and 49788 transitions. [2020-12-22 07:25:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:50,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:50,999 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 07:25:51,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:25:51,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 116201608, now seen corresponding path program 1 times [2020-12-22 07:25:51,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:51,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340782086] [2020-12-22 07:25:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:51,324 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 07:25:51,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340782086] [2020-12-22 07:25:51,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:51,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:51,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466146707] [2020-12-22 07:25:51,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:51,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:51,327 INFO L87 Difference]: Start difference. First operand 29713 states and 49788 transitions. Second operand 3 states. [2020-12-22 07:25:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:52,166 INFO L93 Difference]: Finished difference Result 56537 states and 94946 transitions. [2020-12-22 07:25:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:52,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:52,266 INFO L225 Difference]: With dead ends: 56537 [2020-12-22 07:25:52,266 INFO L226 Difference]: Without dead ends: 41174 [2020-12-22 07:25:52,298 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 07:25:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41174 states. [2020-12-22 07:25:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41174 to 41172. [2020-12-22 07:25:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41172 states. [2020-12-22 07:25:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41172 states to 41172 states and 68859 transitions. [2020-12-22 07:25:53,855 INFO L78 Accepts]: Start accepts. Automaton has 41172 states and 68859 transitions. Word has length 233 [2020-12-22 07:25:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:53,855 INFO L481 AbstractCegarLoop]: Abstraction has 41172 states and 68859 transitions. [2020-12-22 07:25:53,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 41172 states and 68859 transitions. [2020-12-22 07:25:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:53,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:53,861 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 07:25:53,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:25:53,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1001177080, now seen corresponding path program 1 times [2020-12-22 07:25:53,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:53,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825880043] [2020-12-22 07:25:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:54,219 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 07:25:54,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825880043] [2020-12-22 07:25:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511274471] [2020-12-22 07:25:54,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:54,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:54,223 INFO L87 Difference]: Start difference. First operand 41172 states and 68859 transitions. Second operand 3 states. [2020-12-22 07:25:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:55,188 INFO L93 Difference]: Finished difference Result 78949 states and 132311 transitions. [2020-12-22 07:25:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:55,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:55,315 INFO L225 Difference]: With dead ends: 78949 [2020-12-22 07:25:55,315 INFO L226 Difference]: Without dead ends: 57413 [2020-12-22 07:25:55,345 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 07:25:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57413 states. [2020-12-22 07:25:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57413 to 57411. [2020-12-22 07:25:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57411 states. [2020-12-22 07:25:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57411 states to 57411 states and 95796 transitions. [2020-12-22 07:25:57,141 INFO L78 Accepts]: Start accepts. Automaton has 57411 states and 95796 transitions. Word has length 233 [2020-12-22 07:25:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:57,141 INFO L481 AbstractCegarLoop]: Abstraction has 57411 states and 95796 transitions. [2020-12-22 07:25:57,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:25:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57411 states and 95796 transitions. [2020-12-22 07:25:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-22 07:25:57,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:57,149 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 07:25:57,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:25:57,150 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1255794568, now seen corresponding path program 1 times [2020-12-22 07:25:57,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:57,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340367041] [2020-12-22 07:25:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:57,325 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 07:25:57,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340367041] [2020-12-22 07:25:57,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:57,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:25:57,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266842216] [2020-12-22 07:25:57,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:25:57,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:25:57,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:25:57,328 INFO L87 Difference]: Start difference. First operand 57411 states and 95796 transitions. Second operand 3 states. [2020-12-22 07:25:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:58,841 INFO L93 Difference]: Finished difference Result 131793 states and 220774 transitions. [2020-12-22 07:25:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:25:58,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-22 07:25:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:59,144 INFO L225 Difference]: With dead ends: 131793 [2020-12-22 07:25:59,145 INFO L226 Difference]: Without dead ends: 89482 [2020-12-22 07:25:59,229 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 07:25:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89482 states. [2020-12-22 07:26:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89482 to 89480. [2020-12-22 07:26:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89480 states. [2020-12-22 07:26:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89480 states to 89480 states and 148930 transitions. [2020-12-22 07:26:01,582 INFO L78 Accepts]: Start accepts. Automaton has 89480 states and 148930 transitions. Word has length 233 [2020-12-22 07:26:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:01,583 INFO L481 AbstractCegarLoop]: Abstraction has 89480 states and 148930 transitions. [2020-12-22 07:26:01,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:26:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 89480 states and 148930 transitions. [2020-12-22 07:26:01,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 07:26:01,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:01,587 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 07:26:01,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:26:01,588 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:01,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1347640466, now seen corresponding path program 1 times [2020-12-22 07:26:01,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:01,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003530852] [2020-12-22 07:26:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:26:02,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003530852] [2020-12-22 07:26:02,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:02,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:02,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325798395] [2020-12-22 07:26:02,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:02,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:02,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:02,078 INFO L87 Difference]: Start difference. First operand 89480 states and 148930 transitions. Second operand 4 states. [2020-12-22 07:26:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:05,371 INFO L93 Difference]: Finished difference Result 295889 states and 493227 transitions. [2020-12-22 07:26:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:05,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2020-12-22 07:26:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:05,775 INFO L225 Difference]: With dead ends: 295889 [2020-12-22 07:26:05,775 INFO L226 Difference]: Without dead ends: 207021 [2020-12-22 07:26:05,909 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 07:26:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207021 states. [2020-12-22 07:26:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207021 to 147460. [2020-12-22 07:26:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147460 states. [2020-12-22 07:26:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147460 states to 147460 states and 244782 transitions. [2020-12-22 07:26:10,146 INFO L78 Accepts]: Start accepts. Automaton has 147460 states and 244782 transitions. Word has length 234 [2020-12-22 07:26:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:10,147 INFO L481 AbstractCegarLoop]: Abstraction has 147460 states and 244782 transitions. [2020-12-22 07:26:10,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 147460 states and 244782 transitions. [2020-12-22 07:26:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-22 07:26:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:10,149 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 07:26:10,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:26:10,150 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1193778039, now seen corresponding path program 1 times [2020-12-22 07:26:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:10,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260662506] [2020-12-22 07:26:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:10,692 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 07:26:10,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260662506] [2020-12-22 07:26:10,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:10,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:10,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545108305] [2020-12-22 07:26:10,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:10,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:10,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:10,697 INFO L87 Difference]: Start difference. First operand 147460 states and 244782 transitions. Second operand 4 states. [2020-12-22 07:26:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:16,390 INFO L93 Difference]: Finished difference Result 485354 states and 807048 transitions. [2020-12-22 07:26:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:16,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2020-12-22 07:26:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:17,103 INFO L225 Difference]: With dead ends: 485354 [2020-12-22 07:26:17,104 INFO L226 Difference]: Without dead ends: 338506 [2020-12-22 07:26:17,310 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 07:26:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338506 states. [2020-12-22 07:26:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338506 to 242456. [2020-12-22 07:26:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242456 states. [2020-12-22 07:26:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242456 states to 242456 states and 401430 transitions. [2020-12-22 07:26:24,530 INFO L78 Accepts]: Start accepts. Automaton has 242456 states and 401430 transitions. Word has length 235 [2020-12-22 07:26:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:24,531 INFO L481 AbstractCegarLoop]: Abstraction has 242456 states and 401430 transitions. [2020-12-22 07:26:24,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 242456 states and 401430 transitions. [2020-12-22 07:26:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 07:26:24,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:24,535 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 07:26:24,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:26:24,536 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:24,536 INFO L82 PathProgramCache]: Analyzing trace with hash 888014441, now seen corresponding path program 1 times [2020-12-22 07:26:24,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:24,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259133782] [2020-12-22 07:26:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:24,725 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 07:26:24,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259133782] [2020-12-22 07:26:24,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:24,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:24,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705491173] [2020-12-22 07:26:24,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:24,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:24,728 INFO L87 Difference]: Start difference. First operand 242456 states and 401430 transitions. Second operand 4 states. [2020-12-22 07:26:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:35,051 INFO L93 Difference]: Finished difference Result 794102 states and 1317108 transitions. [2020-12-22 07:26:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:35,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2020-12-22 07:26:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:36,311 INFO L225 Difference]: With dead ends: 794102 [2020-12-22 07:26:36,311 INFO L226 Difference]: Without dead ends: 552258 [2020-12-22 07:26:36,608 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 07:26:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552258 states. [2020-12-22 07:26:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552258 to 396500. [2020-12-22 07:26:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396500 states. [2020-12-22 07:26:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396500 states to 396500 states and 654810 transitions. [2020-12-22 07:26:50,627 INFO L78 Accepts]: Start accepts. Automaton has 396500 states and 654810 transitions. Word has length 236 [2020-12-22 07:26:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:26:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 396500 states and 654810 transitions. [2020-12-22 07:26:50,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:26:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 396500 states and 654810 transitions. [2020-12-22 07:26:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 07:26:50,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:26:50,632 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 07:26:50,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:26:50,634 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:26:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:26:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash 168281838, now seen corresponding path program 1 times [2020-12-22 07:26:50,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:26:50,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584243734] [2020-12-22 07:26:50,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:26:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:26:51,043 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 07:26:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584243734] [2020-12-22 07:26:51,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:26:51,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:26:51,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714906600] [2020-12-22 07:26:51,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:26:51,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:26:51,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:26:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:26:51,050 INFO L87 Difference]: Start difference. First operand 396500 states and 654810 transitions. Second operand 4 states. [2020-12-22 07:27:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:12,082 INFO L93 Difference]: Finished difference Result 1285146 states and 2126208 transitions. [2020-12-22 07:27:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:27:12,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2020-12-22 07:27:12,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:14,170 INFO L225 Difference]: With dead ends: 1285146 [2020-12-22 07:27:14,171 INFO L226 Difference]: Without dead ends: 889258 [2020-12-22 07:27:15,033 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 07:27:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889258 states. [2020-12-22 07:27:37,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889258 to 641512. [2020-12-22 07:27:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641512 states. [2020-12-22 07:27:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641512 states to 641512 states and 1056810 transitions. [2020-12-22 07:27:40,959 INFO L78 Accepts]: Start accepts. Automaton has 641512 states and 1056810 transitions. Word has length 237 [2020-12-22 07:27:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:40,960 INFO L481 AbstractCegarLoop]: Abstraction has 641512 states and 1056810 transitions. [2020-12-22 07:27:40,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:27:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 641512 states and 1056810 transitions. [2020-12-22 07:27:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 07:27:40,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:40,976 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 07:27:40,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:27:40,976 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash 500315686, now seen corresponding path program 1 times [2020-12-22 07:27:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:40,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865478068] [2020-12-22 07:27:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:42,445 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 07:27:42,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865478068] [2020-12-22 07:27:42,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:42,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:27:42,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665952763] [2020-12-22 07:27:42,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:27:42,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:27:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:42,449 INFO L87 Difference]: Start difference. First operand 641512 states and 1056810 transitions. Second operand 7 states. [2020-12-22 07:28:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:02,767 INFO L93 Difference]: Finished difference Result 1282416 states and 2112558 transitions. [2020-12-22 07:28:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:28:02,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2020-12-22 07:28:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:04,162 INFO L225 Difference]: With dead ends: 1282416 [2020-12-22 07:28:04,162 INFO L226 Difference]: Without dead ends: 641516 [2020-12-22 07:28:04,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:28:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641516 states. [2020-12-22 07:28:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641516 to 641512. [2020-12-22 07:28:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641512 states. [2020-12-22 07:28:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641512 states to 641512 states and 1053685 transitions. [2020-12-22 07:28:26,403 INFO L78 Accepts]: Start accepts. Automaton has 641512 states and 1053685 transitions. Word has length 239 [2020-12-22 07:28:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:26,404 INFO L481 AbstractCegarLoop]: Abstraction has 641512 states and 1053685 transitions. [2020-12-22 07:28:26,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:28:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 641512 states and 1053685 transitions. [2020-12-22 07:28:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 07:28:26,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:26,407 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 07:28:26,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:28:26,408 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1866662220, now seen corresponding path program 1 times [2020-12-22 07:28:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:26,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716680720] [2020-12-22 07:28:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:26,850 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 07:28:26,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716680720] [2020-12-22 07:28:26,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:26,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:28:26,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677241515] [2020-12-22 07:28:26,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:28:26,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:28:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:28:26,853 INFO L87 Difference]: Start difference. First operand 641512 states and 1053685 transitions. Second operand 7 states.