/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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:43:14,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:43:14,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:43:14,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:43:14,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:43:14,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:43:14,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:43:14,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:43:14,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:43:14,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:43:14,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:43:14,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:43:14,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:43:14,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:43:14,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:43:14,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:43:14,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:43:14,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:43:14,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:43:14,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:43:14,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:43:14,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:43:14,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:43:14,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:43:14,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:43:14,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:43:14,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:43:14,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:43:14,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:43:14,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:43:14,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:43:14,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:43:14,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:43:14,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:43:14,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:43:14,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:43:14,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:43:14,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:43:14,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:43:14,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:43:14,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:43:14,756 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:43:14,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:43:14,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:43:14,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:43:14,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:43:14,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:43:14,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:43:14,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:43:14,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:43:14,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:43:14,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:43:14,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:43:14,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:43:14,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:43:14,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:43:14,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:43:14,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:43:14,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:43:14,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:43:14,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:43:14,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:43:14,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:43:15,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:43:15,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:43:15,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:43:15,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:43:15,190 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:43:15,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:15,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3fed5fc7/2a1fe6a1190d4f90a2da06990d3db020/FLAGdf576d4c4 [2020-12-22 07:43:15,958 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:43:15,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:15,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3fed5fc7/2a1fe6a1190d4f90a2da06990d3db020/FLAGdf576d4c4 [2020-12-22 07:43:16,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3fed5fc7/2a1fe6a1190d4f90a2da06990d3db020 [2020-12-22 07:43:16,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:43:16,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:43:16,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:16,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:43:16,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:43:16,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:16,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281d018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16, skipping insertion in model container [2020-12-22 07:43:16,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:16,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:43:16,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:43:16,637 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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c[30998,31011] [2020-12-22 07:43:16,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:16,655 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:43:16,818 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_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c[30998,31011] [2020-12-22 07:43:16,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:43:16,844 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:43:16,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16 WrapperNode [2020-12-22 07:43:16,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:43:16,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:16,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:43:16,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:43:16,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:16,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:43:17,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:43:17,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:43:17,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:43:17,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (1/1) ... [2020-12-22 07:43:17,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:43:17,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:43:17,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:43:17,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:43:17,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (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 07:43:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:43:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:43:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:43:17,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:43:18,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:43:18,993 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:43:18,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:18 BoogieIcfgContainer [2020-12-22 07:43:18,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:43:19,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:43:19,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:43:19,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:43:19,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:43:16" (1/3) ... [2020-12-22 07:43:19,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4cff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:19, skipping insertion in model container [2020-12-22 07:43:19,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:43:16" (2/3) ... [2020-12-22 07:43:19,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4cff22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:43:19, skipping insertion in model container [2020-12-22 07:43:19,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:43:18" (3/3) ... [2020-12-22 07:43:19,014 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:43:19,021 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:43:19,028 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:43:19,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:43:19,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:43:19,102 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:43:19,102 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:43:19,102 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:43:19,102 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:43:19,102 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:43:19,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:43:19,103 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:43:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states. [2020-12-22 07:43:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:19,164 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] [2020-12-22 07:43:19,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1105173396, now seen corresponding path program 1 times [2020-12-22 07:43:19,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:19,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584030374] [2020-12-22 07:43:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:19,580 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 07:43:19,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584030374] [2020-12-22 07:43:19,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:19,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:43:19,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83673371] [2020-12-22 07:43:19,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:43:19,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:43:19,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:43:19,607 INFO L87 Difference]: Start difference. First operand 324 states. Second operand 2 states. [2020-12-22 07:43:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:19,655 INFO L93 Difference]: Finished difference Result 453 states and 802 transitions. [2020-12-22 07:43:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:43:19,659 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:43:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:19,692 INFO L225 Difference]: With dead ends: 453 [2020-12-22 07:43:19,692 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 07:43:19,700 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 07:43:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 07:43:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-12-22 07:43:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 07:43:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 575 transitions. [2020-12-22 07:43:19,813 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 575 transitions. Word has length 77 [2020-12-22 07:43:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:19,814 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 575 transitions. [2020-12-22 07:43:19,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:43:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 575 transitions. [2020-12-22 07:43:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:43:19,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:19,822 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] [2020-12-22 07:43:19,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:43:19,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash 971159890, now seen corresponding path program 1 times [2020-12-22 07:43:19,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:19,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907235577] [2020-12-22 07:43:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:20,194 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 07:43:20,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907235577] [2020-12-22 07:43:20,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:20,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:43:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339015240] [2020-12-22 07:43:20,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:43:20,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:20,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:43:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:20,200 INFO L87 Difference]: Start difference. First operand 320 states and 575 transitions. Second operand 5 states. [2020-12-22 07:43:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:20,326 INFO L93 Difference]: Finished difference Result 448 states and 792 transitions. [2020-12-22 07:43:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:43:20,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:43:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:20,331 INFO L225 Difference]: With dead ends: 448 [2020-12-22 07:43:20,332 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 07:43:20,334 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 07:43:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 07:43:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-12-22 07:43:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-12-22 07:43:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 529 transitions. [2020-12-22 07:43:20,353 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 529 transitions. Word has length 77 [2020-12-22 07:43:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:20,354 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 529 transitions. [2020-12-22 07:43:20,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 529 transitions. [2020-12-22 07:43:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 07:43:20,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:20,357 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] [2020-12-22 07:43:20,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:43:20,357 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 750751880, now seen corresponding path program 1 times [2020-12-22 07:43:20,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:20,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486972532] [2020-12-22 07:43:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:20,611 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 07:43:20,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486972532] [2020-12-22 07:43:20,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:20,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:20,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082866108] [2020-12-22 07:43:20,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:20,616 INFO L87 Difference]: Start difference. First operand 320 states and 529 transitions. Second operand 3 states. [2020-12-22 07:43:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:20,682 INFO L93 Difference]: Finished difference Result 556 states and 933 transitions. [2020-12-22 07:43:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:20,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 07:43:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:20,689 INFO L225 Difference]: With dead ends: 556 [2020-12-22 07:43:20,689 INFO L226 Difference]: Without dead ends: 432 [2020-12-22 07:43:20,694 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 07:43:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-12-22 07:43:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2020-12-22 07:43:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-12-22 07:43:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2020-12-22 07:43:20,729 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 122 [2020-12-22 07:43:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:20,730 INFO L481 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2020-12-22 07:43:20,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2020-12-22 07:43:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 07:43:20,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:20,736 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] [2020-12-22 07:43:20,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:43:20,739 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -44233893, now seen corresponding path program 1 times [2020-12-22 07:43:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:20,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789092374] [2020-12-22 07:43:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:21,043 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 07:43:21,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789092374] [2020-12-22 07:43:21,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:21,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150205685] [2020-12-22 07:43:21,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:21,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:21,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:21,047 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand 3 states. [2020-12-22 07:43:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:21,084 INFO L93 Difference]: Finished difference Result 878 states and 1474 transitions. [2020-12-22 07:43:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:21,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 07:43:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:21,091 INFO L225 Difference]: With dead ends: 878 [2020-12-22 07:43:21,091 INFO L226 Difference]: Without dead ends: 644 [2020-12-22 07:43:21,093 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 07:43:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-22 07:43:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2020-12-22 07:43:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-22 07:43:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1073 transitions. [2020-12-22 07:43:21,121 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1073 transitions. Word has length 125 [2020-12-22 07:43:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:21,122 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 1073 transitions. [2020-12-22 07:43:21,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1073 transitions. [2020-12-22 07:43:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 07:43:21,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:21,125 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] [2020-12-22 07:43:21,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:43:21,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash 487395088, now seen corresponding path program 1 times [2020-12-22 07:43:21,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:21,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879018832] [2020-12-22 07:43:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:21,313 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 07:43:21,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879018832] [2020-12-22 07:43:21,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:21,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:21,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131346960] [2020-12-22 07:43:21,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:21,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:21,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:21,318 INFO L87 Difference]: Start difference. First operand 642 states and 1073 transitions. Second operand 3 states. [2020-12-22 07:43:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:21,378 INFO L93 Difference]: Finished difference Result 1494 states and 2515 transitions. [2020-12-22 07:43:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:21,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 07:43:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:21,388 INFO L225 Difference]: With dead ends: 1494 [2020-12-22 07:43:21,389 INFO L226 Difference]: Without dead ends: 1048 [2020-12-22 07:43:21,390 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 07:43:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-12-22 07:43:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1046. [2020-12-22 07:43:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-12-22 07:43:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1753 transitions. [2020-12-22 07:43:21,429 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1753 transitions. Word has length 128 [2020-12-22 07:43:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:21,429 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1753 transitions. [2020-12-22 07:43:21,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1753 transitions. [2020-12-22 07:43:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:43:21,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:21,436 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] [2020-12-22 07:43:21,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:43:21,436 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1255785821, now seen corresponding path program 1 times [2020-12-22 07:43:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:21,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419346059] [2020-12-22 07:43:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:21,624 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 07:43:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419346059] [2020-12-22 07:43:21,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:21,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042470830] [2020-12-22 07:43:21,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:21,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:21,627 INFO L87 Difference]: Start difference. First operand 1046 states and 1753 transitions. Second operand 3 states. [2020-12-22 07:43:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:21,689 INFO L93 Difference]: Finished difference Result 2666 states and 4483 transitions. [2020-12-22 07:43:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:21,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 07:43:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:21,702 INFO L225 Difference]: With dead ends: 2666 [2020-12-22 07:43:21,702 INFO L226 Difference]: Without dead ends: 1816 [2020-12-22 07:43:21,704 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 07:43:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2020-12-22 07:43:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1814. [2020-12-22 07:43:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1814 states. [2020-12-22 07:43:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 3037 transitions. [2020-12-22 07:43:21,763 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 3037 transitions. Word has length 131 [2020-12-22 07:43:21,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:21,764 INFO L481 AbstractCegarLoop]: Abstraction has 1814 states and 3037 transitions. [2020-12-22 07:43:21,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 3037 transitions. [2020-12-22 07:43:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:43:21,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:21,767 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] [2020-12-22 07:43:21,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:43:21,768 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 871480728, now seen corresponding path program 1 times [2020-12-22 07:43:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:21,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543095942] [2020-12-22 07:43:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:22,164 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 07:43:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543095942] [2020-12-22 07:43:22,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:22,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:43:22,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643492204] [2020-12-22 07:43:22,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:43:22,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:43:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:22,168 INFO L87 Difference]: Start difference. First operand 1814 states and 3037 transitions. Second operand 6 states. [2020-12-22 07:43:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:22,468 INFO L93 Difference]: Finished difference Result 6792 states and 11478 transitions. [2020-12-22 07:43:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:43:22,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 07:43:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:22,511 INFO L225 Difference]: With dead ends: 6792 [2020-12-22 07:43:22,511 INFO L226 Difference]: Without dead ends: 5174 [2020-12-22 07:43:22,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:43:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2020-12-22 07:43:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 3322. [2020-12-22 07:43:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3322 states. [2020-12-22 07:43:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5570 transitions. [2020-12-22 07:43:22,745 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5570 transitions. Word has length 134 [2020-12-22 07:43:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:22,746 INFO L481 AbstractCegarLoop]: Abstraction has 3322 states and 5570 transitions. [2020-12-22 07:43:22,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:43:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5570 transitions. [2020-12-22 07:43:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 07:43:22,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:22,754 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] [2020-12-22 07:43:22,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:43:22,755 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:22,756 INFO L82 PathProgramCache]: Analyzing trace with hash -848507773, now seen corresponding path program 1 times [2020-12-22 07:43:22,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:22,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130261682] [2020-12-22 07:43:22,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:23,066 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 07:43:23,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130261682] [2020-12-22 07:43:23,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:23,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:23,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822884882] [2020-12-22 07:43:23,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:23,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:23,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:23,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:23,069 INFO L87 Difference]: Start difference. First operand 3322 states and 5570 transitions. Second operand 4 states. [2020-12-22 07:43:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:23,300 INFO L93 Difference]: Finished difference Result 9784 states and 16511 transitions. [2020-12-22 07:43:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:23,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-22 07:43:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:23,343 INFO L225 Difference]: With dead ends: 9784 [2020-12-22 07:43:23,343 INFO L226 Difference]: Without dead ends: 6658 [2020-12-22 07:43:23,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 07:43:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6658 states. [2020-12-22 07:43:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6658 to 4927. [2020-12-22 07:43:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4927 states. [2020-12-22 07:43:23,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 8275 transitions. [2020-12-22 07:43:23,596 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 8275 transitions. Word has length 135 [2020-12-22 07:43:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:23,597 INFO L481 AbstractCegarLoop]: Abstraction has 4927 states and 8275 transitions. [2020-12-22 07:43:23,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 8275 transitions. [2020-12-22 07:43:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:23,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:23,602 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] [2020-12-22 07:43:23,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:43:23,603 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:23,604 INFO L82 PathProgramCache]: Analyzing trace with hash 942022462, now seen corresponding path program 1 times [2020-12-22 07:43:23,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:23,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807659324] [2020-12-22 07:43:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:23,781 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 07:43:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807659324] [2020-12-22 07:43:23,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:23,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:23,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611701313] [2020-12-22 07:43:23,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:23,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:23,790 INFO L87 Difference]: Start difference. First operand 4927 states and 8275 transitions. Second operand 3 states. [2020-12-22 07:43:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:23,969 INFO L93 Difference]: Finished difference Result 9527 states and 16015 transitions. [2020-12-22 07:43:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:23,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:24,030 INFO L225 Difference]: With dead ends: 9527 [2020-12-22 07:43:24,030 INFO L226 Difference]: Without dead ends: 6957 [2020-12-22 07:43:24,036 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 07:43:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2020-12-22 07:43:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6955. [2020-12-22 07:43:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6955 states. [2020-12-22 07:43:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6955 states to 6955 states and 11641 transitions. [2020-12-22 07:43:24,406 INFO L78 Accepts]: Start accepts. Automaton has 6955 states and 11641 transitions. Word has length 136 [2020-12-22 07:43:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:24,406 INFO L481 AbstractCegarLoop]: Abstraction has 6955 states and 11641 transitions. [2020-12-22 07:43:24,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 6955 states and 11641 transitions. [2020-12-22 07:43:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:24,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:24,410 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] [2020-12-22 07:43:24,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:43:24,411 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -506487182, now seen corresponding path program 1 times [2020-12-22 07:43:24,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:24,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889738493] [2020-12-22 07:43:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:24,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889738493] [2020-12-22 07:43:24,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:24,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796748340] [2020-12-22 07:43:24,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:24,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:24,533 INFO L87 Difference]: Start difference. First operand 6955 states and 11641 transitions. Second operand 3 states. [2020-12-22 07:43:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:24,829 INFO L93 Difference]: Finished difference Result 13407 states and 22463 transitions. [2020-12-22 07:43:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:24,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:24,860 INFO L225 Difference]: With dead ends: 13407 [2020-12-22 07:43:24,861 INFO L226 Difference]: Without dead ends: 9781 [2020-12-22 07:43:24,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2020-12-22 07:43:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 9779. [2020-12-22 07:43:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9779 states. [2020-12-22 07:43:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9779 states to 9779 states and 16307 transitions. [2020-12-22 07:43:25,335 INFO L78 Accepts]: Start accepts. Automaton has 9779 states and 16307 transitions. Word has length 136 [2020-12-22 07:43:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:25,336 INFO L481 AbstractCegarLoop]: Abstraction has 9779 states and 16307 transitions. [2020-12-22 07:43:25,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 9779 states and 16307 transitions. [2020-12-22 07:43:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:25,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:43:25,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:43:25,339 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2094526018, now seen corresponding path program 1 times [2020-12-22 07:43:25,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:25,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143929308] [2020-12-22 07:43:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:43:25,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143929308] [2020-12-22 07:43:25,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:25,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652762884] [2020-12-22 07:43:25,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:25,463 INFO L87 Difference]: Start difference. First operand 9779 states and 16307 transitions. Second operand 3 states. [2020-12-22 07:43:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:25,812 INFO L93 Difference]: Finished difference Result 18739 states and 31281 transitions. [2020-12-22 07:43:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:25,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:25,846 INFO L225 Difference]: With dead ends: 18739 [2020-12-22 07:43:25,846 INFO L226 Difference]: Without dead ends: 13643 [2020-12-22 07:43:25,857 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 07:43:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13643 states. [2020-12-22 07:43:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13643 to 13641. [2020-12-22 07:43:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13641 states. [2020-12-22 07:43:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13641 states to 13641 states and 22653 transitions. [2020-12-22 07:43:26,313 INFO L78 Accepts]: Start accepts. Automaton has 13641 states and 22653 transitions. Word has length 136 [2020-12-22 07:43:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:26,314 INFO L481 AbstractCegarLoop]: Abstraction has 13641 states and 22653 transitions. [2020-12-22 07:43:26,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13641 states and 22653 transitions. [2020-12-22 07:43:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:26,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:26,316 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] [2020-12-22 07:43:26,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:43:26,317 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1835427887, now seen corresponding path program 1 times [2020-12-22 07:43:26,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:26,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186360196] [2020-12-22 07:43:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:26,604 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 07:43:26,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186360196] [2020-12-22 07:43:26,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347521850] [2020-12-22 07:43:26,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:26,607 INFO L87 Difference]: Start difference. First operand 13641 states and 22653 transitions. Second operand 4 states. [2020-12-22 07:43:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:27,591 INFO L93 Difference]: Finished difference Result 44384 states and 73828 transitions. [2020-12-22 07:43:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:27,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-12-22 07:43:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:27,686 INFO L225 Difference]: With dead ends: 44384 [2020-12-22 07:43:27,686 INFO L226 Difference]: Without dead ends: 31103 [2020-12-22 07:43:27,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31103 states. [2020-12-22 07:43:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31103 to 22155. [2020-12-22 07:43:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22155 states. [2020-12-22 07:43:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 36669 transitions. [2020-12-22 07:43:28,626 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 36669 transitions. Word has length 136 [2020-12-22 07:43:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:28,627 INFO L481 AbstractCegarLoop]: Abstraction has 22155 states and 36669 transitions. [2020-12-22 07:43:28,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 36669 transitions. [2020-12-22 07:43:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:43:28,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:28,747 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] [2020-12-22 07:43:28,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:43:28,747 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1829805838, now seen corresponding path program 1 times [2020-12-22 07:43:28,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:28,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455556529] [2020-12-22 07:43:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:28,854 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 07:43:28,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455556529] [2020-12-22 07:43:28,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:28,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:28,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252373849] [2020-12-22 07:43:28,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:28,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:28,857 INFO L87 Difference]: Start difference. First operand 22155 states and 36669 transitions. Second operand 3 states. [2020-12-22 07:43:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:29,752 INFO L93 Difference]: Finished difference Result 48794 states and 81139 transitions. [2020-12-22 07:43:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:29,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 07:43:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:29,853 INFO L225 Difference]: With dead ends: 48794 [2020-12-22 07:43:29,854 INFO L226 Difference]: Without dead ends: 33280 [2020-12-22 07:43:29,888 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 07:43:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2020-12-22 07:43:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 33278. [2020-12-22 07:43:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33278 states. [2020-12-22 07:43:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33278 states to 33278 states and 54919 transitions. [2020-12-22 07:43:30,986 INFO L78 Accepts]: Start accepts. Automaton has 33278 states and 54919 transitions. Word has length 136 [2020-12-22 07:43:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:30,987 INFO L481 AbstractCegarLoop]: Abstraction has 33278 states and 54919 transitions. [2020-12-22 07:43:30,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:43:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 33278 states and 54919 transitions. [2020-12-22 07:43:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 07:43:30,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:30,989 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] [2020-12-22 07:43:30,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:43:30,991 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash -692908230, now seen corresponding path program 1 times [2020-12-22 07:43:30,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:30,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146062001] [2020-12-22 07:43:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:31,311 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 07:43:31,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146062001] [2020-12-22 07:43:31,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:31,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:31,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319213730] [2020-12-22 07:43:31,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:31,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:31,314 INFO L87 Difference]: Start difference. First operand 33278 states and 54919 transitions. Second operand 4 states. [2020-12-22 07:43:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:33,303 INFO L93 Difference]: Finished difference Result 108186 states and 178737 transitions. [2020-12-22 07:43:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:33,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2020-12-22 07:43:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:33,589 INFO L225 Difference]: With dead ends: 108186 [2020-12-22 07:43:33,589 INFO L226 Difference]: Without dead ends: 75154 [2020-12-22 07:43:33,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:43:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75154 states. [2020-12-22 07:43:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75154 to 54073. [2020-12-22 07:43:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54073 states. [2020-12-22 07:43:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54073 states to 54073 states and 88859 transitions. [2020-12-22 07:43:35,821 INFO L78 Accepts]: Start accepts. Automaton has 54073 states and 88859 transitions. Word has length 137 [2020-12-22 07:43:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:35,822 INFO L481 AbstractCegarLoop]: Abstraction has 54073 states and 88859 transitions. [2020-12-22 07:43:35,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 54073 states and 88859 transitions. [2020-12-22 07:43:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 07:43:35,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:35,824 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] [2020-12-22 07:43:35,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:43:35,825 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1592912186, now seen corresponding path program 1 times [2020-12-22 07:43:35,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:35,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426821773] [2020-12-22 07:43:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:36,181 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 07:43:36,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426821773] [2020-12-22 07:43:36,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:36,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:36,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594085130] [2020-12-22 07:43:36,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:36,188 INFO L87 Difference]: Start difference. First operand 54073 states and 88859 transitions. Second operand 4 states. [2020-12-22 07:43:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:38,416 INFO L93 Difference]: Finished difference Result 177762 states and 292392 transitions. [2020-12-22 07:43:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:38,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-12-22 07:43:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:38,693 INFO L225 Difference]: With dead ends: 177762 [2020-12-22 07:43:38,693 INFO L226 Difference]: Without dead ends: 123935 [2020-12-22 07:43:38,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 07:43:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123935 states. [2020-12-22 07:43:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123935 to 86808. [2020-12-22 07:43:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86808 states. [2020-12-22 07:43:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86808 states to 86808 states and 142059 transitions. [2020-12-22 07:43:41,893 INFO L78 Accepts]: Start accepts. Automaton has 86808 states and 142059 transitions. Word has length 138 [2020-12-22 07:43:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:41,894 INFO L481 AbstractCegarLoop]: Abstraction has 86808 states and 142059 transitions. [2020-12-22 07:43:41,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 86808 states and 142059 transitions. [2020-12-22 07:43:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 07:43:41,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:41,896 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] [2020-12-22 07:43:41,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:43:41,897 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash 298565918, now seen corresponding path program 1 times [2020-12-22 07:43:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:41,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105637600] [2020-12-22 07:43:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:42,190 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 07:43:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105637600] [2020-12-22 07:43:42,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:42,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:42,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236269519] [2020-12-22 07:43:42,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:42,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:42,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:42,193 INFO L87 Difference]: Start difference. First operand 86808 states and 142059 transitions. Second operand 4 states. [2020-12-22 07:43:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:46,035 INFO L93 Difference]: Finished difference Result 257840 states and 421711 transitions. [2020-12-22 07:43:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:46,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-12-22 07:43:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:46,544 INFO L225 Difference]: With dead ends: 257840 [2020-12-22 07:43:46,544 INFO L226 Difference]: Without dead ends: 171043 [2020-12-22 07:43:46,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:43:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171043 states. [2020-12-22 07:43:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171043 to 171041. [2020-12-22 07:43:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171041 states. [2020-12-22 07:43:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171041 states to 171041 states and 278494 transitions. [2020-12-22 07:43:51,726 INFO L78 Accepts]: Start accepts. Automaton has 171041 states and 278494 transitions. Word has length 140 [2020-12-22 07:43:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:51,726 INFO L481 AbstractCegarLoop]: Abstraction has 171041 states and 278494 transitions. [2020-12-22 07:43:51,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 171041 states and 278494 transitions. [2020-12-22 07:43:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:43:51,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:51,729 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] [2020-12-22 07:43:51,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:43:51,730 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash -176222731, now seen corresponding path program 1 times [2020-12-22 07:43:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:51,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104499565] [2020-12-22 07:43:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:51,809 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 07:43:51,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104499565] [2020-12-22 07:43:51,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:51,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:43:51,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478362257] [2020-12-22 07:43:51,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:43:51,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:43:51,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:43:51,812 INFO L87 Difference]: Start difference. First operand 171041 states and 278494 transitions. Second operand 3 states. [2020-12-22 07:43:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:57,093 INFO L93 Difference]: Finished difference Result 414410 states and 677846 transitions. [2020-12-22 07:43:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:43:57,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2020-12-22 07:43:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:57,858 INFO L225 Difference]: With dead ends: 414410 [2020-12-22 07:43:57,859 INFO L226 Difference]: Without dead ends: 243767 [2020-12-22 07:43:58,019 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 07:43:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243767 states. [2020-12-22 07:44:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243767 to 237143. [2020-12-22 07:44:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237143 states. [2020-12-22 07:44:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237143 states to 237143 states and 384199 transitions. [2020-12-22 07:44:05,166 INFO L78 Accepts]: Start accepts. Automaton has 237143 states and 384199 transitions. Word has length 141 [2020-12-22 07:44:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:05,167 INFO L481 AbstractCegarLoop]: Abstraction has 237143 states and 384199 transitions. [2020-12-22 07:44:05,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 237143 states and 384199 transitions. [2020-12-22 07:44:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:05,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:05,168 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] [2020-12-22 07:44:05,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:44:05,169 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1671679888, now seen corresponding path program 1 times [2020-12-22 07:44:05,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:05,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790199412] [2020-12-22 07:44:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:05,245 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 07:44:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790199412] [2020-12-22 07:44:05,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:05,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531212321] [2020-12-22 07:44:05,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:05,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:05,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:05,249 INFO L87 Difference]: Start difference. First operand 237143 states and 384199 transitions. Second operand 3 states. [2020-12-22 07:44:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:15,412 INFO L93 Difference]: Finished difference Result 711392 states and 1152534 transitions. [2020-12-22 07:44:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:15,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:16,524 INFO L225 Difference]: With dead ends: 711392 [2020-12-22 07:44:16,525 INFO L226 Difference]: Without dead ends: 474270 [2020-12-22 07:44:16,763 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 07:44:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474270 states. [2020-12-22 07:44:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474270 to 237156. [2020-12-22 07:44:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237156 states. [2020-12-22 07:44:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237156 states to 237156 states and 384218 transitions. [2020-12-22 07:44:26,421 INFO L78 Accepts]: Start accepts. Automaton has 237156 states and 384218 transitions. Word has length 142 [2020-12-22 07:44:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:26,421 INFO L481 AbstractCegarLoop]: Abstraction has 237156 states and 384218 transitions. [2020-12-22 07:44:26,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 237156 states and 384218 transitions. [2020-12-22 07:44:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:44:26,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:26,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:26,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:44:26,424 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:26,424 INFO L82 PathProgramCache]: Analyzing trace with hash -939121031, now seen corresponding path program 1 times [2020-12-22 07:44:26,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:26,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89286062] [2020-12-22 07:44:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:26,584 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 07:44:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89286062] [2020-12-22 07:44:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:26,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:44:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894782651] [2020-12-22 07:44:26,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:44:26,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:44:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:44:26,588 INFO L87 Difference]: Start difference. First operand 237156 states and 384218 transitions. Second operand 3 states. [2020-12-22 07:44:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:38,079 INFO L93 Difference]: Finished difference Result 704111 states and 1139939 transitions. [2020-12-22 07:44:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:44:38,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2020-12-22 07:44:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:39,905 INFO L225 Difference]: With dead ends: 704111 [2020-12-22 07:44:39,905 INFO L226 Difference]: Without dead ends: 467093 [2020-12-22 07:44:40,285 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 07:44:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467093 states. [2020-12-22 07:44:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467093 to 467091. [2020-12-22 07:44:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467091 states. [2020-12-22 07:44:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467091 states to 467091 states and 752671 transitions. [2020-12-22 07:44:57,324 INFO L78 Accepts]: Start accepts. Automaton has 467091 states and 752671 transitions. Word has length 142 [2020-12-22 07:44:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:44:57,324 INFO L481 AbstractCegarLoop]: Abstraction has 467091 states and 752671 transitions. [2020-12-22 07:44:57,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:44:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 467091 states and 752671 transitions. [2020-12-22 07:44:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:44:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:44:57,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:44:57,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:44:57,340 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:44:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:44:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1189508400, now seen corresponding path program 1 times [2020-12-22 07:44:57,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:44:57,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95951463] [2020-12-22 07:44:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:44:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:44:58,369 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 07:44:58,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95951463] [2020-12-22 07:44:58,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:44:58,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:44:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421162760] [2020-12-22 07:44:58,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:44:58,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:44:58,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:44:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:44:58,374 INFO L87 Difference]: Start difference. First operand 467091 states and 752671 transitions. Second operand 4 states. [2020-12-22 07:45:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:45:22,412 INFO L93 Difference]: Finished difference Result 1388146 states and 2237394 transitions. [2020-12-22 07:45:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:45:22,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:45:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:45:25,013 INFO L225 Difference]: With dead ends: 1388146 [2020-12-22 07:45:25,013 INFO L226 Difference]: Without dead ends: 921092 [2020-12-22 07:45:26,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:45:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921092 states. [2020-12-22 07:46:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921092 to 921090. [2020-12-22 07:46:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921090 states. [2020-12-22 07:46:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921090 states to 921090 states and 1477426 transitions. [2020-12-22 07:46:11,054 INFO L78 Accepts]: Start accepts. Automaton has 921090 states and 1477426 transitions. Word has length 143 [2020-12-22 07:46:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:46:11,068 INFO L481 AbstractCegarLoop]: Abstraction has 921090 states and 1477426 transitions. [2020-12-22 07:46:11,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:46:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 921090 states and 1477426 transitions. [2020-12-22 07:46:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 07:46:11,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:46:11,076 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] [2020-12-22 07:46:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:46:11,077 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:46:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:46:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash 943648514, now seen corresponding path program 1 times [2020-12-22 07:46:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:46:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115756445] [2020-12-22 07:46:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:46:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:46:11,225 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 07:46:11,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115756445] [2020-12-22 07:46:11,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:46:11,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:46:11,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084473751] [2020-12-22 07:46:11,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:46:11,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:46:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:46:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:46:11,230 INFO L87 Difference]: Start difference. First operand 921090 states and 1477426 transitions. Second operand 3 states.