/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/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:33:40,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:33:40,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:33:40,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:33:40,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:33:40,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:33:40,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:33:40,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:33:40,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:33:40,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:33:40,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:33:40,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:33:40,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:33:40,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:33:40,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:33:40,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:33:40,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:33:40,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:33:40,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:33:40,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:33:40,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:33:40,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:33:40,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:33:40,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:33:40,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:33:40,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:33:40,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:33:40,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:33:40,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:33:40,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:33:40,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:33:40,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:33:40,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:33:40,700 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:33:40,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:33:40,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:33:40,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:33:40,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:33:40,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:33:40,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:33:40,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:33:40,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:33:40,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:33:40,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:33:40,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:33:40,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:33:40,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:33:40,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:33:40,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:33:40,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:33:40,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:33:40,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:33:40,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:33:40,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:33:40,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:33:41,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:33:41,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:33:41,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:33:41,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:33:41,218 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:33:41,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:33:41,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5a46de/c20e613665b845e5864fac3c649cf347/FLAGa01e54f66 [2020-12-22 09:33:42,380 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:33:42,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:33:42,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5a46de/c20e613665b845e5864fac3c649cf347/FLAGa01e54f66 [2020-12-22 09:33:42,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d5a46de/c20e613665b845e5864fac3c649cf347 [2020-12-22 09:33:42,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:33:42,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:33:42,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:42,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:33:42,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:33:42,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:42" (1/1) ... [2020-12-22 09:33:42,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b73a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:42, skipping insertion in model container [2020-12-22 09:33:42,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:42" (1/1) ... [2020-12-22 09:33:42,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:33:43,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:33:43,491 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/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[6545,6558] [2020-12-22 09:33:43,569 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/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[13238,13251] [2020-12-22 09:33:44,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:44,876 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:33:44,908 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/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[6545,6558] [2020-12-22 09:33:44,928 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/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[13238,13251] [2020-12-22 09:33:45,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:45,813 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:33:45,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45 WrapperNode [2020-12-22 09:33:45,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:45,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:45,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:33:45,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:33:45,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:45,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:46,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:33:46,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:33:46,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:33:46,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (1/1) ... [2020-12-22 09:33:46,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:33:46,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:33:46,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:33:46,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:33:46,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (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 09:33:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:33:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:33:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:33:47,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:33:52,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:33:52,591 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:33:52,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:52 BoogieIcfgContainer [2020-12-22 09:33:52,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:33:52,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:33:52,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:33:52,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:33:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:33:42" (1/3) ... [2020-12-22 09:33:52,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9f763f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:52, skipping insertion in model container [2020-12-22 09:33:52,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:45" (2/3) ... [2020-12-22 09:33:52,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9f763f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:52, skipping insertion in model container [2020-12-22 09:33:52,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:52" (3/3) ... [2020-12-22 09:33:52,615 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:33:52,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:33:52,630 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:33:52,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:33:52,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:33:52,688 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:33:52,688 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:33:52,688 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:33:52,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:33:52,688 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:33:52,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:33:52,689 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:33:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states. [2020-12-22 09:33:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:52,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:52,732 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] [2020-12-22 09:33:52,732 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:52,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2020-12-22 09:33:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:52,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302701243] [2020-12-22 09:33:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:53,013 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 09:33:53,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302701243] [2020-12-22 09:33:53,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:53,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:53,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251561623] [2020-12-22 09:33:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:33:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:53,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:33:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:33:53,039 INFO L87 Difference]: Start difference. First operand 879 states. Second operand 2 states. [2020-12-22 09:33:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:53,146 INFO L93 Difference]: Finished difference Result 1734 states and 3294 transitions. [2020-12-22 09:33:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:33:53,148 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:33:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:53,180 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:33:53,180 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:33:53,192 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 09:33:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:33:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:33:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:33:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1535 transitions. [2020-12-22 09:33:53,318 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1535 transitions. Word has length 26 [2020-12-22 09:33:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:53,318 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1535 transitions. [2020-12-22 09:33:53,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:33:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1535 transitions. [2020-12-22 09:33:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:53,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:53,320 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] [2020-12-22 09:33:53,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:33:53,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2020-12-22 09:33:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:53,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330599765] [2020-12-22 09:33:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:53,494 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 09:33:53,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330599765] [2020-12-22 09:33:53,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:53,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:53,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825553210] [2020-12-22 09:33:53,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:53,500 INFO L87 Difference]: Start difference. First operand 813 states and 1535 transitions. Second operand 5 states. [2020-12-22 09:33:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:53,669 INFO L93 Difference]: Finished difference Result 854 states and 1597 transitions. [2020-12-22 09:33:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:53,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:33:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:53,675 INFO L225 Difference]: With dead ends: 854 [2020-12-22 09:33:53,676 INFO L226 Difference]: Without dead ends: 813 [2020-12-22 09:33:53,677 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 09:33:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-22 09:33:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2020-12-22 09:33:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-12-22 09:33:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1519 transitions. [2020-12-22 09:33:53,698 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1519 transitions. Word has length 26 [2020-12-22 09:33:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:53,699 INFO L481 AbstractCegarLoop]: Abstraction has 813 states and 1519 transitions. [2020-12-22 09:33:53,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1519 transitions. [2020-12-22 09:33:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:53,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:53,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:33:53,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:53,703 INFO L82 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2020-12-22 09:33:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116124286] [2020-12-22 09:33:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:53,829 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 09:33:53,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116124286] [2020-12-22 09:33:53,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:53,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:53,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874054385] [2020-12-22 09:33:53,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:53,838 INFO L87 Difference]: Start difference. First operand 813 states and 1519 transitions. Second operand 3 states. [2020-12-22 09:33:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:53,877 INFO L93 Difference]: Finished difference Result 881 states and 1625 transitions. [2020-12-22 09:33:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:53,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:33:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:53,888 INFO L225 Difference]: With dead ends: 881 [2020-12-22 09:33:53,889 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:33:53,891 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 09:33:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:33:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 842. [2020-12-22 09:33:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2020-12-22 09:33:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1565 transitions. [2020-12-22 09:33:53,925 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1565 transitions. Word has length 41 [2020-12-22 09:33:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:53,927 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1565 transitions. [2020-12-22 09:33:53,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1565 transitions. [2020-12-22 09:33:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:53,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:53,934 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] [2020-12-22 09:33:53,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:33:53,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2020-12-22 09:33:53,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248261830] [2020-12-22 09:33:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,056 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 09:33:54,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248261830] [2020-12-22 09:33:54,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:54,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393848102] [2020-12-22 09:33:54,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:54,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:54,060 INFO L87 Difference]: Start difference. First operand 842 states and 1565 transitions. Second operand 3 states. [2020-12-22 09:33:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:54,105 INFO L93 Difference]: Finished difference Result 962 states and 1753 transitions. [2020-12-22 09:33:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:54,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:33:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:54,111 INFO L225 Difference]: With dead ends: 962 [2020-12-22 09:33:54,111 INFO L226 Difference]: Without dead ends: 896 [2020-12-22 09:33:54,112 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 09:33:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2020-12-22 09:33:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2020-12-22 09:33:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2020-12-22 09:33:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1646 transitions. [2020-12-22 09:33:54,139 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1646 transitions. Word has length 41 [2020-12-22 09:33:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:54,140 INFO L481 AbstractCegarLoop]: Abstraction has 894 states and 1646 transitions. [2020-12-22 09:33:54,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1646 transitions. [2020-12-22 09:33:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:54,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:54,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:54,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:33:54,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:54,144 INFO L82 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2020-12-22 09:33:54,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:54,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823256331] [2020-12-22 09:33:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,340 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 09:33:54,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823256331] [2020-12-22 09:33:54,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:54,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358256450] [2020-12-22 09:33:54,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:54,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:54,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:54,343 INFO L87 Difference]: Start difference. First operand 894 states and 1646 transitions. Second operand 5 states. [2020-12-22 09:33:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:54,516 INFO L93 Difference]: Finished difference Result 1602 states and 2756 transitions. [2020-12-22 09:33:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:54,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:33:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:54,526 INFO L225 Difference]: With dead ends: 1602 [2020-12-22 09:33:54,527 INFO L226 Difference]: Without dead ends: 1484 [2020-12-22 09:33:54,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2020-12-22 09:33:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1010. [2020-12-22 09:33:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-12-22 09:33:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1822 transitions. [2020-12-22 09:33:54,564 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1822 transitions. Word has length 41 [2020-12-22 09:33:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:54,564 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1822 transitions. [2020-12-22 09:33:54,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1822 transitions. [2020-12-22 09:33:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:54,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:54,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:54,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:33:54,566 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2020-12-22 09:33:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:54,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474714265] [2020-12-22 09:33:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,623 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 09:33:54,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474714265] [2020-12-22 09:33:54,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:54,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321042888] [2020-12-22 09:33:54,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:54,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:54,626 INFO L87 Difference]: Start difference. First operand 1010 states and 1822 transitions. Second operand 3 states. [2020-12-22 09:33:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:54,685 INFO L93 Difference]: Finished difference Result 1434 states and 2468 transitions. [2020-12-22 09:33:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:54,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:54,693 INFO L225 Difference]: With dead ends: 1434 [2020-12-22 09:33:54,694 INFO L226 Difference]: Without dead ends: 1200 [2020-12-22 09:33:54,695 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 09:33:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-12-22 09:33:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-12-22 09:33:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:33:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2078 transitions. [2020-12-22 09:33:54,738 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2078 transitions. Word has length 43 [2020-12-22 09:33:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:54,739 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2078 transitions. [2020-12-22 09:33:54,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2078 transitions. [2020-12-22 09:33:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:54,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:54,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:54,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:33:54,740 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2020-12-22 09:33:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:54,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794969897] [2020-12-22 09:33:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:54,879 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 09:33:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794969897] [2020-12-22 09:33:54,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:54,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518727750] [2020-12-22 09:33:54,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:54,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:54,888 INFO L87 Difference]: Start difference. First operand 1190 states and 2078 transitions. Second operand 5 states. [2020-12-22 09:33:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:55,016 INFO L93 Difference]: Finished difference Result 1606 states and 2696 transitions. [2020-12-22 09:33:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:55,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:33:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:55,025 INFO L225 Difference]: With dead ends: 1606 [2020-12-22 09:33:55,026 INFO L226 Difference]: Without dead ends: 1192 [2020-12-22 09:33:55,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:33:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2020-12-22 09:33:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1190. [2020-12-22 09:33:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-12-22 09:33:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2070 transitions. [2020-12-22 09:33:55,071 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2070 transitions. Word has length 43 [2020-12-22 09:33:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:55,073 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 2070 transitions. [2020-12-22 09:33:55,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2070 transitions. [2020-12-22 09:33:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:33:55,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:55,075 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] [2020-12-22 09:33:55,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:33:55,076 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2020-12-22 09:33:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:55,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572287833] [2020-12-22 09:33:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:55,205 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 09:33:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572287833] [2020-12-22 09:33:55,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:55,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:33:55,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267921149] [2020-12-22 09:33:55,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 09:33:55,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 09:33:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:55,208 INFO L87 Difference]: Start difference. First operand 1190 states and 2070 transitions. Second operand 8 states. [2020-12-22 09:33:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:55,438 INFO L93 Difference]: Finished difference Result 1516 states and 2534 transitions. [2020-12-22 09:33:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:33:55,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-22 09:33:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:55,447 INFO L225 Difference]: With dead ends: 1516 [2020-12-22 09:33:55,448 INFO L226 Difference]: Without dead ends: 1514 [2020-12-22 09:33:55,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:33:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-12-22 09:33:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1214. [2020-12-22 09:33:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2020-12-22 09:33:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2090 transitions. [2020-12-22 09:33:55,508 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2090 transitions. Word has length 44 [2020-12-22 09:33:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:55,508 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 2090 transitions. [2020-12-22 09:33:55,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 09:33:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2090 transitions. [2020-12-22 09:33:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 09:33:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:55,509 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] [2020-12-22 09:33:55,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:33:55,510 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2020-12-22 09:33:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:55,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548001400] [2020-12-22 09:33:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:55,578 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 09:33:55,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548001400] [2020-12-22 09:33:55,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:55,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:55,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536901811] [2020-12-22 09:33:55,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:55,584 INFO L87 Difference]: Start difference. First operand 1214 states and 2090 transitions. Second operand 3 states. [2020-12-22 09:33:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:55,656 INFO L93 Difference]: Finished difference Result 1669 states and 2752 transitions. [2020-12-22 09:33:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:55,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 09:33:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:55,665 INFO L225 Difference]: With dead ends: 1669 [2020-12-22 09:33:55,665 INFO L226 Difference]: Without dead ends: 1410 [2020-12-22 09:33:55,666 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 09:33:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2020-12-22 09:33:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1408. [2020-12-22 09:33:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:33:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2360 transitions. [2020-12-22 09:33:55,740 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2360 transitions. Word has length 45 [2020-12-22 09:33:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:55,740 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2360 transitions. [2020-12-22 09:33:55,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2360 transitions. [2020-12-22 09:33:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:33:55,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:55,742 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] [2020-12-22 09:33:55,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:33:55,742 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash 673878181, now seen corresponding path program 1 times [2020-12-22 09:33:55,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:55,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930088014] [2020-12-22 09:33:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:55,944 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 09:33:55,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930088014] [2020-12-22 09:33:55,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:55,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:55,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212012867] [2020-12-22 09:33:55,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:33:55,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:33:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:33:55,947 INFO L87 Difference]: Start difference. First operand 1408 states and 2360 transitions. Second operand 4 states. [2020-12-22 09:34:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:07,375 INFO L93 Difference]: Finished difference Result 3663 states and 6669 transitions. [2020-12-22 09:34:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:34:07,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:34:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:07,393 INFO L225 Difference]: With dead ends: 3663 [2020-12-22 09:34:07,393 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 09:34:07,395 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 09:34:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 09:34:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2020-12-22 09:34:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2910 states. [2020-12-22 09:34:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4474 transitions. [2020-12-22 09:34:07,544 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4474 transitions. Word has length 60 [2020-12-22 09:34:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:07,545 INFO L481 AbstractCegarLoop]: Abstraction has 2910 states and 4474 transitions. [2020-12-22 09:34:07,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:34:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4474 transitions. [2020-12-22 09:34:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:34:07,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:07,547 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:07,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:34:07,547 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:07,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1836022441, now seen corresponding path program 1 times [2020-12-22 09:34:07,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:07,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71746676] [2020-12-22 09:34:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:34:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71746676] [2020-12-22 09:34:07,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:07,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821262877] [2020-12-22 09:34:07,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:07,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:07,643 INFO L87 Difference]: Start difference. First operand 2910 states and 4474 transitions. Second operand 5 states. [2020-12-22 09:34:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:07,885 INFO L93 Difference]: Finished difference Result 4938 states and 7350 transitions. [2020-12-22 09:34:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:07,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:34:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:07,908 INFO L225 Difference]: With dead ends: 4938 [2020-12-22 09:34:07,908 INFO L226 Difference]: Without dead ends: 4308 [2020-12-22 09:34:07,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2020-12-22 09:34:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2020-12-22 09:34:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3538 states. [2020-12-22 09:34:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5358 transitions. [2020-12-22 09:34:08,139 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5358 transitions. Word has length 63 [2020-12-22 09:34:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:08,139 INFO L481 AbstractCegarLoop]: Abstraction has 3538 states and 5358 transitions. [2020-12-22 09:34:08,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5358 transitions. [2020-12-22 09:34:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 09:34:08,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:08,141 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:08,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:34:08,141 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 67239625, now seen corresponding path program 1 times [2020-12-22 09:34:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:08,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014599263] [2020-12-22 09:34:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:34:08,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014599263] [2020-12-22 09:34:08,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:08,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:08,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526027908] [2020-12-22 09:34:08,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:08,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:08,211 INFO L87 Difference]: Start difference. First operand 3538 states and 5358 transitions. Second operand 5 states. [2020-12-22 09:34:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:08,470 INFO L93 Difference]: Finished difference Result 5566 states and 8234 transitions. [2020-12-22 09:34:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:08,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 09:34:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:08,497 INFO L225 Difference]: With dead ends: 5566 [2020-12-22 09:34:08,497 INFO L226 Difference]: Without dead ends: 4936 [2020-12-22 09:34:08,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2020-12-22 09:34:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2020-12-22 09:34:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2020-12-22 09:34:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6674 transitions. [2020-12-22 09:34:08,755 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6674 transitions. Word has length 63 [2020-12-22 09:34:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:08,756 INFO L481 AbstractCegarLoop]: Abstraction has 4482 states and 6674 transitions. [2020-12-22 09:34:08,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6674 transitions. [2020-12-22 09:34:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:08,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:08,758 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:08,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:34:08,758 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2131767521, now seen corresponding path program 1 times [2020-12-22 09:34:08,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:08,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46149728] [2020-12-22 09:34:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46149728] [2020-12-22 09:34:08,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:08,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137655916] [2020-12-22 09:34:08,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:08,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:08,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:08,823 INFO L87 Difference]: Start difference. First operand 4482 states and 6674 transitions. Second operand 3 states. [2020-12-22 09:34:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:08,967 INFO L93 Difference]: Finished difference Result 6075 states and 8941 transitions. [2020-12-22 09:34:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:08,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:34:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:09,004 INFO L225 Difference]: With dead ends: 6075 [2020-12-22 09:34:09,005 INFO L226 Difference]: Without dead ends: 3873 [2020-12-22 09:34:09,017 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 09:34:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2020-12-22 09:34:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3871. [2020-12-22 09:34:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3871 states. [2020-12-22 09:34:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5814 transitions. [2020-12-22 09:34:09,198 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5814 transitions. Word has length 65 [2020-12-22 09:34:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:09,199 INFO L481 AbstractCegarLoop]: Abstraction has 3871 states and 5814 transitions. [2020-12-22 09:34:09,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5814 transitions. [2020-12-22 09:34:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:34:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:09,207 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:09,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:34:09,207 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1187468114, now seen corresponding path program 1 times [2020-12-22 09:34:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:09,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036290906] [2020-12-22 09:34:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:34:09,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036290906] [2020-12-22 09:34:09,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:09,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:09,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035607914] [2020-12-22 09:34:09,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:34:09,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:34:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:34:09,308 INFO L87 Difference]: Start difference. First operand 3871 states and 5814 transitions. Second operand 5 states. [2020-12-22 09:34:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:09,574 INFO L93 Difference]: Finished difference Result 5223 states and 7738 transitions. [2020-12-22 09:34:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:34:09,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 09:34:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:09,586 INFO L225 Difference]: With dead ends: 5223 [2020-12-22 09:34:09,587 INFO L226 Difference]: Without dead ends: 4773 [2020-12-22 09:34:09,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:34:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2020-12-22 09:34:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4319. [2020-12-22 09:34:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4319 states. [2020-12-22 09:34:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 6446 transitions. [2020-12-22 09:34:09,879 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 6446 transitions. Word has length 65 [2020-12-22 09:34:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:09,879 INFO L481 AbstractCegarLoop]: Abstraction has 4319 states and 6446 transitions. [2020-12-22 09:34:09,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:34:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 6446 transitions. [2020-12-22 09:34:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:09,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:09,881 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:09,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:34:09,881 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1662229482, now seen corresponding path program 1 times [2020-12-22 09:34:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:09,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908388493] [2020-12-22 09:34:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:10,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908388493] [2020-12-22 09:34:10,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468404342] [2020-12-22 09:34:10,146 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 09:34:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:34:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:34:10,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:10,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:34:10,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977195250] [2020-12-22 09:34:10,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:34:10,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:10,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:34:10,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:34:10,535 INFO L87 Difference]: Start difference. First operand 4319 states and 6446 transitions. Second operand 12 states. [2020-12-22 09:34:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:13,845 INFO L93 Difference]: Finished difference Result 13613 states and 19202 transitions. [2020-12-22 09:34:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 09:34:13,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-22 09:34:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:13,871 INFO L225 Difference]: With dead ends: 13613 [2020-12-22 09:34:13,871 INFO L226 Difference]: Without dead ends: 11595 [2020-12-22 09:34:13,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:34:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11595 states. [2020-12-22 09:34:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11595 to 8331. [2020-12-22 09:34:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8331 states. [2020-12-22 09:34:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 11723 transitions. [2020-12-22 09:34:14,607 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 11723 transitions. Word has length 66 [2020-12-22 09:34:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:14,607 INFO L481 AbstractCegarLoop]: Abstraction has 8331 states and 11723 transitions. [2020-12-22 09:34:14,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:34:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 11723 transitions. [2020-12-22 09:34:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:14,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:14,610 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:14,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:34:14,825 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash -44763738, now seen corresponding path program 1 times [2020-12-22 09:34:14,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:14,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180202359] [2020-12-22 09:34:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180202359] [2020-12-22 09:34:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327355198] [2020-12-22 09:34:15,075 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 09:34:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:34:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:15,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:15,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:15,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:15,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826464322] [2020-12-22 09:34:15,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:15,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:15,742 INFO L87 Difference]: Start difference. First operand 8331 states and 11723 transitions. Second operand 17 states. [2020-12-22 09:34:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:19,995 INFO L93 Difference]: Finished difference Result 32202 states and 43781 transitions. [2020-12-22 09:34:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:34:19,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:34:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:20,055 INFO L225 Difference]: With dead ends: 32202 [2020-12-22 09:34:20,055 INFO L226 Difference]: Without dead ends: 27291 [2020-12-22 09:34:20,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:34:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27291 states. [2020-12-22 09:34:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 16004. [2020-12-22 09:34:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16004 states. [2020-12-22 09:34:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16004 states to 16004 states and 22009 transitions. [2020-12-22 09:34:21,767 INFO L78 Accepts]: Start accepts. Automaton has 16004 states and 22009 transitions. Word has length 67 [2020-12-22 09:34:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:21,767 INFO L481 AbstractCegarLoop]: Abstraction has 16004 states and 22009 transitions. [2020-12-22 09:34:21,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 16004 states and 22009 transitions. [2020-12-22 09:34:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:21,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:21,770 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:21,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:34:21,986 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2066736808, now seen corresponding path program 1 times [2020-12-22 09:34:21,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:21,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762357797] [2020-12-22 09:34:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762357797] [2020-12-22 09:34:22,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222691405] [2020-12-22 09:34:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:34:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:22,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:34:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:22,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:22,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:34:22,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352722266] [2020-12-22 09:34:22,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:34:22,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:34:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:34:22,854 INFO L87 Difference]: Start difference. First operand 16004 states and 22009 transitions. Second operand 17 states. [2020-12-22 09:34:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:30,158 INFO L93 Difference]: Finished difference Result 77443 states and 104665 transitions. [2020-12-22 09:34:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:34:30,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-22 09:34:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:30,324 INFO L225 Difference]: With dead ends: 77443 [2020-12-22 09:34:30,324 INFO L226 Difference]: Without dead ends: 66013 [2020-12-22 09:34:30,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:34:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66013 states. [2020-12-22 09:34:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66013 to 34055. [2020-12-22 09:34:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34055 states. [2020-12-22 09:34:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34055 states to 34055 states and 46277 transitions. [2020-12-22 09:34:33,832 INFO L78 Accepts]: Start accepts. Automaton has 34055 states and 46277 transitions. Word has length 67 [2020-12-22 09:34:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:33,833 INFO L481 AbstractCegarLoop]: Abstraction has 34055 states and 46277 transitions. [2020-12-22 09:34:33,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:34:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34055 states and 46277 transitions. [2020-12-22 09:34:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:33,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:33,836 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:34,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:34:34,048 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash -848751410, now seen corresponding path program 1 times [2020-12-22 09:34:34,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:34,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468807013] [2020-12-22 09:34:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:34,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468807013] [2020-12-22 09:34:34,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:34,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:34,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866840007] [2020-12-22 09:34:34,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:34,100 INFO L87 Difference]: Start difference. First operand 34055 states and 46277 transitions. Second operand 3 states. [2020-12-22 09:34:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:36,487 INFO L93 Difference]: Finished difference Result 49273 states and 66886 transitions. [2020-12-22 09:34:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:36,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:34:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:36,551 INFO L225 Difference]: With dead ends: 49273 [2020-12-22 09:34:36,552 INFO L226 Difference]: Without dead ends: 20761 [2020-12-22 09:34:36,583 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 09:34:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20761 states. [2020-12-22 09:34:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20761 to 20525. [2020-12-22 09:34:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20525 states. [2020-12-22 09:34:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20525 states to 20525 states and 27439 transitions. [2020-12-22 09:34:38,299 INFO L78 Accepts]: Start accepts. Automaton has 20525 states and 27439 transitions. Word has length 67 [2020-12-22 09:34:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:38,299 INFO L481 AbstractCegarLoop]: Abstraction has 20525 states and 27439 transitions. [2020-12-22 09:34:38,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 20525 states and 27439 transitions. [2020-12-22 09:34:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:38,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:38,302 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:38,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:34:38,302 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:38,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2096259026, now seen corresponding path program 1 times [2020-12-22 09:34:38,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:38,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038039270] [2020-12-22 09:34:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038039270] [2020-12-22 09:34:38,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:38,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:34:38,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101381835] [2020-12-22 09:34:38,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:34:38,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:34:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:34:38,347 INFO L87 Difference]: Start difference. First operand 20525 states and 27439 transitions. Second operand 3 states. [2020-12-22 09:34:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:39,722 INFO L93 Difference]: Finished difference Result 30427 states and 40570 transitions. [2020-12-22 09:34:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:34:39,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:34:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:39,751 INFO L225 Difference]: With dead ends: 30427 [2020-12-22 09:34:39,751 INFO L226 Difference]: Without dead ends: 14415 [2020-12-22 09:34:39,774 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 09:34:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14415 states. [2020-12-22 09:34:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14415 to 14413. [2020-12-22 09:34:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14413 states. [2020-12-22 09:34:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 19062 transitions. [2020-12-22 09:34:41,151 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 19062 transitions. Word has length 67 [2020-12-22 09:34:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:41,151 INFO L481 AbstractCegarLoop]: Abstraction has 14413 states and 19062 transitions. [2020-12-22 09:34:41,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:34:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 19062 transitions. [2020-12-22 09:34:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:41,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:41,153 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:41,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:34:41,154 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash 873869654, now seen corresponding path program 1 times [2020-12-22 09:34:41,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:41,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593221576] [2020-12-22 09:34:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:34:41,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593221576] [2020-12-22 09:34:41,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:41,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:41,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84126160] [2020-12-22 09:34:41,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:41,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:41,279 INFO L87 Difference]: Start difference. First operand 14413 states and 19062 transitions. Second operand 6 states. [2020-12-22 09:34:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:41,899 INFO L93 Difference]: Finished difference Result 20624 states and 27117 transitions. [2020-12-22 09:34:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:41,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:34:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:41,913 INFO L225 Difference]: With dead ends: 20624 [2020-12-22 09:34:41,914 INFO L226 Difference]: Without dead ends: 8572 [2020-12-22 09:34:41,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2020-12-22 09:34:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8572. [2020-12-22 09:34:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8572 states. [2020-12-22 09:34:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8572 states to 8572 states and 11546 transitions. [2020-12-22 09:34:42,699 INFO L78 Accepts]: Start accepts. Automaton has 8572 states and 11546 transitions. Word has length 67 [2020-12-22 09:34:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:42,699 INFO L481 AbstractCegarLoop]: Abstraction has 8572 states and 11546 transitions. [2020-12-22 09:34:42,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8572 states and 11546 transitions. [2020-12-22 09:34:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:42,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:42,701 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:42,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:34:42,701 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1198871190, now seen corresponding path program 1 times [2020-12-22 09:34:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:42,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117252689] [2020-12-22 09:34:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:34:42,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117252689] [2020-12-22 09:34:42,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:42,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:42,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556095726] [2020-12-22 09:34:42,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:42,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:42,775 INFO L87 Difference]: Start difference. First operand 8572 states and 11546 transitions. Second operand 6 states. [2020-12-22 09:34:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:43,727 INFO L93 Difference]: Finished difference Result 13171 states and 17409 transitions. [2020-12-22 09:34:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:43,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:34:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:43,735 INFO L225 Difference]: With dead ends: 13171 [2020-12-22 09:34:43,736 INFO L226 Difference]: Without dead ends: 6972 [2020-12-22 09:34:43,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6972 states. [2020-12-22 09:34:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6972 to 6972. [2020-12-22 09:34:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6972 states. [2020-12-22 09:34:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 9434 transitions. [2020-12-22 09:34:44,414 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 9434 transitions. Word has length 67 [2020-12-22 09:34:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:44,414 INFO L481 AbstractCegarLoop]: Abstraction has 6972 states and 9434 transitions. [2020-12-22 09:34:44,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 9434 transitions. [2020-12-22 09:34:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:44,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:44,416 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:44,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:34:44,416 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -49807498, now seen corresponding path program 1 times [2020-12-22 09:34:44,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:44,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459224415] [2020-12-22 09:34:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:34:44,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459224415] [2020-12-22 09:34:44,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:44,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:44,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528767736] [2020-12-22 09:34:44,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:44,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:44,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:44,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:44,492 INFO L87 Difference]: Start difference. First operand 6972 states and 9434 transitions. Second operand 6 states. [2020-12-22 09:34:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:45,502 INFO L93 Difference]: Finished difference Result 13997 states and 18353 transitions. [2020-12-22 09:34:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:45,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:34:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:45,515 INFO L225 Difference]: With dead ends: 13997 [2020-12-22 09:34:45,515 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:34:45,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:34:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 8760. [2020-12-22 09:34:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8760 states. [2020-12-22 09:34:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 11676 transitions. [2020-12-22 09:34:46,187 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 11676 transitions. Word has length 67 [2020-12-22 09:34:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:46,188 INFO L481 AbstractCegarLoop]: Abstraction has 8760 states and 11676 transitions. [2020-12-22 09:34:46,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 11676 transitions. [2020-12-22 09:34:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:34:46,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:46,190 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:46,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:34:46,190 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1937529655, now seen corresponding path program 1 times [2020-12-22 09:34:46,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:46,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039063569] [2020-12-22 09:34:46,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:46,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039063569] [2020-12-22 09:34:46,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975327284] [2020-12-22 09:34:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:34:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:47,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:47,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:47,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:47,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:48,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:48,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:34:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408091122] [2020-12-22 09:34:48,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:34:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:34:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:34:48,040 INFO L87 Difference]: Start difference. First operand 8760 states and 11676 transitions. Second operand 26 states. [2020-12-22 09:34:49,031 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:34:49,292 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-12-22 09:34:49,543 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-12-22 09:34:49,781 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:34:50,013 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:34:50,266 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-12-22 09:34:50,524 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-12-22 09:34:50,795 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:34:51,035 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:34:51,240 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:34:51,387 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:34:51,547 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:34:51,766 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 09:34:52,365 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 09:34:52,820 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 09:34:53,119 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-22 09:34:53,865 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 09:34:54,165 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:34:54,712 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 09:34:55,203 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-12-22 09:34:55,497 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 09:34:55,797 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-12-22 09:34:56,013 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-12-22 09:34:56,287 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 09:34:56,504 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-22 09:34:56,702 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-12-22 09:34:56,950 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-12-22 09:34:57,105 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-12-22 09:34:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:59,271 INFO L93 Difference]: Finished difference Result 15015 states and 19595 transitions. [2020-12-22 09:34:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 09:34:59,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2020-12-22 09:34:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:59,283 INFO L225 Difference]: With dead ends: 15015 [2020-12-22 09:34:59,283 INFO L226 Difference]: Without dead ends: 11163 [2020-12-22 09:34:59,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1329, Invalid=6681, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 09:34:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11163 states. [2020-12-22 09:34:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11163 to 7861. [2020-12-22 09:34:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7861 states. [2020-12-22 09:34:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 10598 transitions. [2020-12-22 09:34:59,982 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 10598 transitions. Word has length 68 [2020-12-22 09:34:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:59,982 INFO L481 AbstractCegarLoop]: Abstraction has 7861 states and 10598 transitions. [2020-12-22 09:34:59,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:34:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 10598 transitions. [2020-12-22 09:34:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:34:59,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:59,984 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:35:00,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:00,200 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 75217277, now seen corresponding path program 1 times [2020-12-22 09:35:00,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:00,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116305224] [2020-12-22 09:35:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:01,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116305224] [2020-12-22 09:35:01,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389950994] [2020-12-22 09:35:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:35:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:03,247 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-12-22 09:35:03,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:35:03,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:03,870 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44