/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/eca-rers2012/Problem13_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:50:18,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:50:18,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:50:18,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 01:50:18,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 01:50:18,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 01:50:18,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 01:50:18,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 01:50:18,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 01:50:18,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 01:50:18,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 01:50:18,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 01:50:18,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:50:18,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:50:18,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:50:18,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:50:18,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:50:18,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:50:18,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:50:18,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:50:18,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:50:18,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:50:18,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:50:18,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:50:18,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 01:50:18,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 01:50:18,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 01:50:18,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 01:50:18,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 01:50:18,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 01:50:18,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 01:50:18,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 01:50:18,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 01:50:18,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 01:50:18,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 01:50:18,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 01:50:18,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 01:50:18,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 01:50:18,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:50:18,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:50:18,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:50:18,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:50:18,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:50:18,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:50:18,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:50:18,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:50:18,780 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:50:18,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:50:18,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:50:18,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:50:18,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:50:18,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:50:18,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:50:18,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:50:18,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:50:18,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:50:18,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:50:18,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:50:18,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:50:18,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:50:18,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:50:18,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:50:18,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:50:18,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:50:18,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:50:18,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:50:18,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:50:18,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:50:19,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:50:19,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:50:19,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:50:19,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:50:19,257 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:50:19,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2020-12-22 01:50:19,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4b37d7/fc85ae32ee5949aeb4d5bce328bc1565/FLAGbd3e361a4 [2020-12-22 01:50:20,585 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:50:20,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label57.c [2020-12-22 01:50:20,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4b37d7/fc85ae32ee5949aeb4d5bce328bc1565/FLAGbd3e361a4 [2020-12-22 01:50:20,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16e4b37d7/fc85ae32ee5949aeb4d5bce328bc1565 [2020-12-22 01:50:20,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:50:20,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:50:20,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:50:20,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:50:20,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:50:20,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:20" (1/1) ... [2020-12-22 01:50:20,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109fbbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:20, skipping insertion in model container [2020-12-22 01:50:20,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:20" (1/1) ... [2020-12-22 01:50:20,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:50:21,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:50:21,508 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/eca-rers2012/Problem13_label57.c[8676,8689] [2020-12-22 01:50:22,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:50:22,981 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:50:23,020 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/eca-rers2012/Problem13_label57.c[8676,8689] [2020-12-22 01:50:23,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:50:23,905 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:50:23,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23 WrapperNode [2020-12-22 01:50:23,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:50:23,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:50:23,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:50:23,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:50:23,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:24,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:24,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:50:24,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:50:24,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:50:24,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:50:25,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:25,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:25,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:25,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:25,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:25,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:26,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (1/1) ... [2020-12-22 01:50:26,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:50:26,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:50:26,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:50:26,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:50:26,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (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 01:50:26,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:50:26,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:50:26,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:50:26,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:50:34,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:50:34,866 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:50:34,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:34 BoogieIcfgContainer [2020-12-22 01:50:34,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:50:34,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:50:34,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:50:34,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:50:34,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:50:20" (1/3) ... [2020-12-22 01:50:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:34, skipping insertion in model container [2020-12-22 01:50:34,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:23" (2/3) ... [2020-12-22 01:50:34,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251f4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:34, skipping insertion in model container [2020-12-22 01:50:34,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:34" (3/3) ... [2020-12-22 01:50:34,881 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label57.c [2020-12-22 01:50:34,889 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:50:34,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:50:34,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:50:34,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:50:34,959 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:50:34,959 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:50:34,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:50:34,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:50:34,959 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:50:34,959 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:50:34,959 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:50:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:50:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 01:50:35,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:35,013 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] [2020-12-22 01:50:35,013 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:35,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2020-12-22 01:50:35,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:35,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975964520] [2020-12-22 01:50:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:35,649 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 01:50:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975964520] [2020-12-22 01:50:35,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:35,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:50:35,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401052697] [2020-12-22 01:50:35,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:50:35,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:50:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:50:35,694 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 4 states. [2020-12-22 01:50:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:49,801 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2020-12-22 01:50:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:50:49,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 01:50:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:49,893 INFO L225 Difference]: With dead ends: 3829 [2020-12-22 01:50:49,893 INFO L226 Difference]: Without dead ends: 2664 [2020-12-22 01:50:49,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 01:50:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2020-12-22 01:50:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2020-12-22 01:50:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2020-12-22 01:50:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2020-12-22 01:50:50,113 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 61 [2020-12-22 01:50:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:50,114 INFO L481 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2020-12-22 01:50:50,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:50:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2020-12-22 01:50:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 01:50:50,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:50,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:50,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:50:50,124 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1383485601, now seen corresponding path program 1 times [2020-12-22 01:50:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:50,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946879375] [2020-12-22 01:50:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:50:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946879375] [2020-12-22 01:50:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913523396] [2020-12-22 01:50:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:50:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:51,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:50:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:50:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-22 01:50:51,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:50:51,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-22 01:50:51,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091999051] [2020-12-22 01:50:51,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:51,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:50:51,631 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand 3 states. [2020-12-22 01:51:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:01,225 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2020-12-22 01:51:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:01,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2020-12-22 01:51:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:01,258 INFO L225 Difference]: With dead ends: 6142 [2020-12-22 01:51:01,258 INFO L226 Difference]: Without dead ends: 4268 [2020-12-22 01:51:01,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:51:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2020-12-22 01:51:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2020-12-22 01:51:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4254 states. [2020-12-22 01:51:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2020-12-22 01:51:01,382 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 186 [2020-12-22 01:51:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:01,384 INFO L481 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2020-12-22 01:51:01,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2020-12-22 01:51:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-12-22 01:51:01,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:01,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 01:51:01,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 01:51:01,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash -540021261, now seen corresponding path program 1 times [2020-12-22 01:51:01,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:01,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461523479] [2020-12-22 01:51:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 01:51:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461523479] [2020-12-22 01:51:01,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:01,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:51:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440718371] [2020-12-22 01:51:01,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:01,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:01,858 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand 3 states. [2020-12-22 01:51:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:10,926 INFO L93 Difference]: Finished difference Result 10899 states and 15275 transitions. [2020-12-22 01:51:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:10,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 228 [2020-12-22 01:51:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:10,974 INFO L225 Difference]: With dead ends: 10899 [2020-12-22 01:51:10,975 INFO L226 Difference]: Without dead ends: 7434 [2020-12-22 01:51:10,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:51:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2020-12-22 01:51:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 7426. [2020-12-22 01:51:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7426 states. [2020-12-22 01:51:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2020-12-22 01:51:11,167 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 228 [2020-12-22 01:51:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:11,168 INFO L481 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2020-12-22 01:51:11,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2020-12-22 01:51:11,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 01:51:11,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:11,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:51:11,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:51:11,174 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:11,175 INFO L82 PathProgramCache]: Analyzing trace with hash 456843222, now seen corresponding path program 1 times [2020-12-22 01:51:11,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:11,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963934694] [2020-12-22 01:51:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:51:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963934694] [2020-12-22 01:51:11,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152471474] [2020-12-22 01:51:11,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:51:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:51:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:51:11,494 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand 4 states. [2020-12-22 01:51:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:30,883 INFO L93 Difference]: Finished difference Result 26882 states and 35363 transitions. [2020-12-22 01:51:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:51:30,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2020-12-22 01:51:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:30,973 INFO L225 Difference]: With dead ends: 26882 [2020-12-22 01:51:30,973 INFO L226 Difference]: Without dead ends: 20245 [2020-12-22 01:51:30,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 01:51:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20245 states. [2020-12-22 01:51:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20245 to 20128. [2020-12-22 01:51:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20128 states. [2020-12-22 01:51:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 25301 transitions. [2020-12-22 01:51:31,504 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 25301 transitions. Word has length 242 [2020-12-22 01:51:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:31,506 INFO L481 AbstractCegarLoop]: Abstraction has 20128 states and 25301 transitions. [2020-12-22 01:51:31,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:51:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 25301 transitions. [2020-12-22 01:51:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 01:51:31,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:31,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:31,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:51:31,514 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash 90102835, now seen corresponding path program 1 times [2020-12-22 01:51:31,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:31,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440281150] [2020-12-22 01:51:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-12-22 01:51:31,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440281150] [2020-12-22 01:51:31,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:31,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:51:31,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065764154] [2020-12-22 01:51:31,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:31,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:31,901 INFO L87 Difference]: Start difference. First operand 20128 states and 25301 transitions. Second operand 3 states. [2020-12-22 01:51:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:42,285 INFO L93 Difference]: Finished difference Result 57562 states and 72828 transitions. [2020-12-22 01:51:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:42,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 258 [2020-12-22 01:51:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:42,395 INFO L225 Difference]: With dead ends: 57562 [2020-12-22 01:51:42,396 INFO L226 Difference]: Without dead ends: 38223 [2020-12-22 01:51:42,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:51:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38223 states. [2020-12-22 01:51:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38223 to 35068. [2020-12-22 01:51:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35068 states. [2020-12-22 01:51:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35068 states to 35068 states and 41754 transitions. [2020-12-22 01:51:43,208 INFO L78 Accepts]: Start accepts. Automaton has 35068 states and 41754 transitions. Word has length 258 [2020-12-22 01:51:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:43,209 INFO L481 AbstractCegarLoop]: Abstraction has 35068 states and 41754 transitions. [2020-12-22 01:51:43,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:43,210 INFO L276 IsEmpty]: Start isEmpty. Operand 35068 states and 41754 transitions. [2020-12-22 01:51:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-12-22 01:51:43,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:43,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 01:51:43,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:51:43,223 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash -817883493, now seen corresponding path program 1 times [2020-12-22 01:51:43,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:43,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357074910] [2020-12-22 01:51:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 286 proven. 25 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-22 01:51:44,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357074910] [2020-12-22 01:51:44,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678936362] [2020-12-22 01:51:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:51:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:44,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:51:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:51:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 01:51:45,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:51:45,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:51:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995396782] [2020-12-22 01:51:45,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:45,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:51:45,544 INFO L87 Difference]: Start difference. First operand 35068 states and 41754 transitions. Second operand 3 states. [2020-12-22 01:51:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:56,363 INFO L93 Difference]: Finished difference Result 96104 states and 115499 transitions. [2020-12-22 01:51:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:56,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2020-12-22 01:51:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:56,504 INFO L225 Difference]: With dead ends: 96104 [2020-12-22 01:51:56,504 INFO L226 Difference]: Without dead ends: 61825 [2020-12-22 01:51:56,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:51:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61825 states. [2020-12-22 01:51:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61825 to 60251. [2020-12-22 01:51:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60251 states. [2020-12-22 01:51:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60251 states to 60251 states and 68788 transitions. [2020-12-22 01:51:58,109 INFO L78 Accepts]: Start accepts. Automaton has 60251 states and 68788 transitions. Word has length 358 [2020-12-22 01:51:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:58,113 INFO L481 AbstractCegarLoop]: Abstraction has 60251 states and 68788 transitions. [2020-12-22 01:51:58,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 60251 states and 68788 transitions. [2020-12-22 01:51:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-12-22 01:51:58,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:58,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:58,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:51:58,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1089876892, now seen corresponding path program 1 times [2020-12-22 01:51:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:58,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647560673] [2020-12-22 01:51:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 01:51:58,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647560673] [2020-12-22 01:51:58,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:58,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:58,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353804984] [2020-12-22 01:51:58,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:58,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:58,782 INFO L87 Difference]: Start difference. First operand 60251 states and 68788 transitions. Second operand 3 states. [2020-12-22 01:52:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:09,460 INFO L93 Difference]: Finished difference Result 145697 states and 168486 transitions. [2020-12-22 01:52:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:09,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 359 [2020-12-22 01:52:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:09,602 INFO L225 Difference]: With dead ends: 145697 [2020-12-22 01:52:09,603 INFO L226 Difference]: Without dead ends: 86235 [2020-12-22 01:52:09,635 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 01:52:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86235 states. [2020-12-22 01:52:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86235 to 82288. [2020-12-22 01:52:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82288 states. [2020-12-22 01:52:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82288 states to 82288 states and 93244 transitions. [2020-12-22 01:52:11,961 INFO L78 Accepts]: Start accepts. Automaton has 82288 states and 93244 transitions. Word has length 359 [2020-12-22 01:52:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:11,962 INFO L481 AbstractCegarLoop]: Abstraction has 82288 states and 93244 transitions. [2020-12-22 01:52:11,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 82288 states and 93244 transitions. [2020-12-22 01:52:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-12-22 01:52:11,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:11,975 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 01:52:11,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:52:11,976 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash -31986142, now seen corresponding path program 1 times [2020-12-22 01:52:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:11,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374301091] [2020-12-22 01:52:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 01:52:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374301091] [2020-12-22 01:52:12,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:12,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:12,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299775528] [2020-12-22 01:52:12,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:12,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:12,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:12,495 INFO L87 Difference]: Start difference. First operand 82288 states and 93244 transitions. Second operand 3 states. [2020-12-22 01:52:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:22,376 INFO L93 Difference]: Finished difference Result 171636 states and 193523 transitions. [2020-12-22 01:52:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:22,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 378 [2020-12-22 01:52:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:22,589 INFO L225 Difference]: With dead ends: 171636 [2020-12-22 01:52:22,589 INFO L226 Difference]: Without dead ends: 83837 [2020-12-22 01:52:22,708 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 01:52:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83837 states. [2020-12-22 01:52:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83837 to 76748. [2020-12-22 01:52:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76748 states. [2020-12-22 01:52:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76748 states to 76748 states and 83734 transitions. [2020-12-22 01:52:24,308 INFO L78 Accepts]: Start accepts. Automaton has 76748 states and 83734 transitions. Word has length 378 [2020-12-22 01:52:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:24,309 INFO L481 AbstractCegarLoop]: Abstraction has 76748 states and 83734 transitions. [2020-12-22 01:52:24,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 76748 states and 83734 transitions. [2020-12-22 01:52:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-12-22 01:52:24,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:24,323 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:52:24,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:52:24,323 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash -650269085, now seen corresponding path program 1 times [2020-12-22 01:52:24,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:24,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529143431] [2020-12-22 01:52:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 01:52:25,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529143431] [2020-12-22 01:52:25,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:25,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610096164] [2020-12-22 01:52:25,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:52:25,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:52:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:52:25,236 INFO L87 Difference]: Start difference. First operand 76748 states and 83734 transitions. Second operand 4 states. [2020-12-22 01:52:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:39,000 INFO L93 Difference]: Finished difference Result 161365 states and 175733 transitions. [2020-12-22 01:52:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:52:39,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 387 [2020-12-22 01:52:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:39,131 INFO L225 Difference]: With dead ends: 161365 [2020-12-22 01:52:39,131 INFO L226 Difference]: Without dead ends: 83828 [2020-12-22 01:52:39,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 01:52:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83828 states. [2020-12-22 01:52:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83828 to 81466. [2020-12-22 01:52:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81466 states. [2020-12-22 01:52:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81466 states to 81466 states and 88059 transitions. [2020-12-22 01:52:40,801 INFO L78 Accepts]: Start accepts. Automaton has 81466 states and 88059 transitions. Word has length 387 [2020-12-22 01:52:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:40,802 INFO L481 AbstractCegarLoop]: Abstraction has 81466 states and 88059 transitions. [2020-12-22 01:52:40,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:52:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 81466 states and 88059 transitions. [2020-12-22 01:52:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-12-22 01:52:40,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:40,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:52:40,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:52:40,812 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:40,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 472745314, now seen corresponding path program 1 times [2020-12-22 01:52:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:40,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270101276] [2020-12-22 01:52:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-22 01:52:41,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270101276] [2020-12-22 01:52:41,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:41,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731827303] [2020-12-22 01:52:41,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:41,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:41,445 INFO L87 Difference]: Start difference. First operand 81466 states and 88059 transitions. Second operand 3 states. [2020-12-22 01:52:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:52:53,966 INFO L93 Difference]: Finished difference Result 188126 states and 204945 transitions. [2020-12-22 01:52:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:52:53,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 417 [2020-12-22 01:52:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:52:54,135 INFO L225 Difference]: With dead ends: 188126 [2020-12-22 01:52:54,135 INFO L226 Difference]: Without dead ends: 106661 [2020-12-22 01:52:54,179 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 01:52:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106661 states. [2020-12-22 01:52:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106661 to 105071. [2020-12-22 01:52:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105071 states. [2020-12-22 01:52:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105071 states to 105071 states and 113914 transitions. [2020-12-22 01:52:55,963 INFO L78 Accepts]: Start accepts. Automaton has 105071 states and 113914 transitions. Word has length 417 [2020-12-22 01:52:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:52:55,964 INFO L481 AbstractCegarLoop]: Abstraction has 105071 states and 113914 transitions. [2020-12-22 01:52:55,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:52:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 105071 states and 113914 transitions. [2020-12-22 01:52:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-12-22 01:52:55,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:52:55,973 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:52:55,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:52:55,974 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:52:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:52:55,975 INFO L82 PathProgramCache]: Analyzing trace with hash 370691495, now seen corresponding path program 1 times [2020-12-22 01:52:55,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:52:55,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785970180] [2020-12-22 01:52:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:52:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:52:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-22 01:52:56,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785970180] [2020-12-22 01:52:56,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:52:56,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:52:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145424084] [2020-12-22 01:52:56,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:52:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:52:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:52:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:52:56,754 INFO L87 Difference]: Start difference. First operand 105071 states and 113914 transitions. Second operand 3 states. [2020-12-22 01:53:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:09,207 INFO L93 Difference]: Finished difference Result 210931 states and 228628 transitions. [2020-12-22 01:53:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 438 [2020-12-22 01:53:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:09,375 INFO L225 Difference]: With dead ends: 210931 [2020-12-22 01:53:09,375 INFO L226 Difference]: Without dead ends: 106649 [2020-12-22 01:53:09,432 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 01:53:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106649 states. [2020-12-22 01:53:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106649 to 103488. [2020-12-22 01:53:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103488 states. [2020-12-22 01:53:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103488 states to 103488 states and 110062 transitions. [2020-12-22 01:53:11,316 INFO L78 Accepts]: Start accepts. Automaton has 103488 states and 110062 transitions. Word has length 438 [2020-12-22 01:53:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:11,317 INFO L481 AbstractCegarLoop]: Abstraction has 103488 states and 110062 transitions. [2020-12-22 01:53:11,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 103488 states and 110062 transitions. [2020-12-22 01:53:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-12-22 01:53:11,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:11,326 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:53:11,327 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1443764751, now seen corresponding path program 1 times [2020-12-22 01:53:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:11,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896791691] [2020-12-22 01:53:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:53:12,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896791691] [2020-12-22 01:53:12,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:12,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086841103] [2020-12-22 01:53:12,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:12,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:12,204 INFO L87 Difference]: Start difference. First operand 103488 states and 110062 transitions. Second operand 3 states. [2020-12-22 01:53:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:25,045 INFO L93 Difference]: Finished difference Result 208564 states and 221877 transitions. [2020-12-22 01:53:25,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:25,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 449 [2020-12-22 01:53:25,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:25,219 INFO L225 Difference]: With dead ends: 208564 [2020-12-22 01:53:25,219 INFO L226 Difference]: Without dead ends: 105865 [2020-12-22 01:53:25,277 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 01:53:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105865 states. [2020-12-22 01:53:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105865 to 105850. [2020-12-22 01:53:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105850 states. [2020-12-22 01:53:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105850 states to 105850 states and 112540 transitions. [2020-12-22 01:53:27,130 INFO L78 Accepts]: Start accepts. Automaton has 105850 states and 112540 transitions. Word has length 449 [2020-12-22 01:53:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:27,131 INFO L481 AbstractCegarLoop]: Abstraction has 105850 states and 112540 transitions. [2020-12-22 01:53:27,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 105850 states and 112540 transitions. [2020-12-22 01:53:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-12-22 01:53:27,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:27,142 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:27,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:53:27,142 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1828462211, now seen corresponding path program 1 times [2020-12-22 01:53:27,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:27,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060477400] [2020-12-22 01:53:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:53:27,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060477400] [2020-12-22 01:53:27,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:27,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:27,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559917868] [2020-12-22 01:53:27,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:27,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:27,967 INFO L87 Difference]: Start difference. First operand 105850 states and 112540 transitions. Second operand 3 states. [2020-12-22 01:53:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:53:41,591 INFO L93 Difference]: Finished difference Result 233751 states and 249414 transitions. [2020-12-22 01:53:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:53:41,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 455 [2020-12-22 01:53:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:53:41,791 INFO L225 Difference]: With dead ends: 233751 [2020-12-22 01:53:41,792 INFO L226 Difference]: Without dead ends: 127902 [2020-12-22 01:53:41,859 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 01:53:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127902 states. [2020-12-22 01:53:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127902 to 125524. [2020-12-22 01:53:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125524 states. [2020-12-22 01:53:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125524 states to 125524 states and 132720 transitions. [2020-12-22 01:53:44,233 INFO L78 Accepts]: Start accepts. Automaton has 125524 states and 132720 transitions. Word has length 455 [2020-12-22 01:53:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:53:44,234 INFO L481 AbstractCegarLoop]: Abstraction has 125524 states and 132720 transitions. [2020-12-22 01:53:44,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:53:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 125524 states and 132720 transitions. [2020-12-22 01:53:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-12-22 01:53:44,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:53:44,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:44,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:53:44,261 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:53:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:53:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2105786897, now seen corresponding path program 1 times [2020-12-22 01:53:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:53:44,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248532131] [2020-12-22 01:53:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:53:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:53:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 505 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:53:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248532131] [2020-12-22 01:53:45,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:53:45,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:53:45,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685943911] [2020-12-22 01:53:45,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:53:45,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:53:45,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:53:45,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:53:45,423 INFO L87 Difference]: Start difference. First operand 125524 states and 132720 transitions. Second operand 3 states.