/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.4.ufo.UNBOUNDED.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:16,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:16,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:16,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:16,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:16,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:16,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:16,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:16,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:16,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:16,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:16,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:16,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:16,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:16,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:16,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:16,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:16,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:16,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:16,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:16,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:16,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:16,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:16,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:16,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:16,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:16,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:16,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:16,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:16,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:16,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:16,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:16,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:16,527 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:16,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:16,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:16,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:16,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:16,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:16,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:16,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:16,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:16,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:16,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:16,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:16,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:16,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:16,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:16,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:16,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:16,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:16,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:16,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:16,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:16,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:16,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:17,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:17,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:17,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:17,022 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:17,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:48:17,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7240ed5fe/92921658f52446d4b1bf693557d0fbce/FLAG9f87ccc44 [2020-12-22 09:48:18,256 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:18,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:48:18,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7240ed5fe/92921658f52446d4b1bf693557d0fbce/FLAG9f87ccc44 [2020-12-22 09:48:18,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7240ed5fe/92921658f52446d4b1bf693557d0fbce [2020-12-22 09:48:18,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:18,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:18,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:18,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:18,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:18,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:18" (1/1) ... [2020-12-22 09:48:18,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c585657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:18, skipping insertion in model container [2020-12-22 09:48:18,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:18" (1/1) ... [2020-12-22 09:48:18,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:18,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:19,266 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.4.ufo.UNBOUNDED.pals+Problem12_label04.c[8784,8797] [2020-12-22 09:48:19,383 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.4.ufo.UNBOUNDED.pals+Problem12_label04.c[15602,15615] [2020-12-22 09:48:20,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:20,311 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:20,383 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.4.ufo.UNBOUNDED.pals+Problem12_label04.c[8784,8797] [2020-12-22 09:48:20,399 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.4.ufo.UNBOUNDED.pals+Problem12_label04.c[15602,15615] [2020-12-22 09:48:21,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:21,116 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:21,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21 WrapperNode [2020-12-22 09:48:21,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:21,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:21,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:21,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:21,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:21,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:21,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:21,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:21,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:21,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:21,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:21,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:21,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:21,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:22,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:22,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:22,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (1/1) ... [2020-12-22 09:48:22,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:22,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:22,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:22,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:22,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (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 09:48:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:48:29,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:48:29,086 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:48:29,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:29 BoogieIcfgContainer [2020-12-22 09:48:29,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:48:29,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:48:29,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:48:29,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:48:29,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:18" (1/3) ... [2020-12-22 09:48:29,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789b245c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:29, skipping insertion in model container [2020-12-22 09:48:29,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:21" (2/3) ... [2020-12-22 09:48:29,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789b245c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:29, skipping insertion in model container [2020-12-22 09:48:29,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:29" (3/3) ... [2020-12-22 09:48:29,100 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label04.c [2020-12-22 09:48:29,107 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:48:29,122 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:48:29,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:48:29,203 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:48:29,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:48:29,206 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:48:29,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:48:29,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:48:29,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:48:29,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:48:29,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:48:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:48:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:29,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:29,271 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] [2020-12-22 09:48:29,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2020-12-22 09:48:29,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:29,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900940265] [2020-12-22 09:48:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:29,552 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 09:48:29,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900940265] [2020-12-22 09:48:29,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:29,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:29,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462800231] [2020-12-22 09:48:29,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:48:29,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:48:29,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:48:29,586 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 2 states. [2020-12-22 09:48:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:29,693 INFO L93 Difference]: Finished difference Result 1757 states and 3334 transitions. [2020-12-22 09:48:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:48:29,695 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:48:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:29,740 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:48:29,740 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:48:29,752 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 09:48:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:48:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:48:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:48:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1562 transitions. [2020-12-22 09:48:29,891 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1562 transitions. Word has length 30 [2020-12-22 09:48:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:29,891 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1562 transitions. [2020-12-22 09:48:29,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:48:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1562 transitions. [2020-12-22 09:48:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:29,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:29,895 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] [2020-12-22 09:48:29,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:48:29,896 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:48:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:29,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172824521] [2020-12-22 09:48:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,107 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 09:48:30,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172824521] [2020-12-22 09:48:30,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:30,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077773784] [2020-12-22 09:48:30,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:30,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:30,112 INFO L87 Difference]: Start difference. First operand 828 states and 1562 transitions. Second operand 5 states. [2020-12-22 09:48:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,281 INFO L93 Difference]: Finished difference Result 877 states and 1637 transitions. [2020-12-22 09:48:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:48:30,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:48:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,289 INFO L225 Difference]: With dead ends: 877 [2020-12-22 09:48:30,289 INFO L226 Difference]: Without dead ends: 828 [2020-12-22 09:48:30,291 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 09:48:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-12-22 09:48:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2020-12-22 09:48:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 09:48:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1539 transitions. [2020-12-22 09:48:30,318 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1539 transitions. Word has length 30 [2020-12-22 09:48:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,318 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1539 transitions. [2020-12-22 09:48:30,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1539 transitions. [2020-12-22 09:48:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:48:30,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,321 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] [2020-12-22 09:48:30,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:48:30,322 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,322 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:48:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078943740] [2020-12-22 09:48:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:30,588 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 09:48:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078943740] [2020-12-22 09:48:30,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:30,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:30,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922310864] [2020-12-22 09:48:30,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:30,596 INFO L87 Difference]: Start difference. First operand 828 states and 1539 transitions. Second operand 6 states. [2020-12-22 09:48:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:30,824 INFO L93 Difference]: Finished difference Result 1188 states and 2107 transitions. [2020-12-22 09:48:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:48:30,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:48:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:30,832 INFO L225 Difference]: With dead ends: 1188 [2020-12-22 09:48:30,832 INFO L226 Difference]: Without dead ends: 1143 [2020-12-22 09:48:30,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:48:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2020-12-22 09:48:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 871. [2020-12-22 09:48:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-22 09:48:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1607 transitions. [2020-12-22 09:48:30,861 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1607 transitions. Word has length 52 [2020-12-22 09:48:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:30,862 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1607 transitions. [2020-12-22 09:48:30,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1607 transitions. [2020-12-22 09:48:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:30,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:30,864 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] [2020-12-22 09:48:30,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:48:30,864 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:48:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:30,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59027704] [2020-12-22 09:48:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,030 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 09:48:31,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59027704] [2020-12-22 09:48:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698511688] [2020-12-22 09:48:31,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,033 INFO L87 Difference]: Start difference. First operand 871 states and 1607 transitions. Second operand 3 states. [2020-12-22 09:48:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,086 INFO L93 Difference]: Finished difference Result 1036 states and 1866 transitions. [2020-12-22 09:48:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,092 INFO L225 Difference]: With dead ends: 1036 [2020-12-22 09:48:31,093 INFO L226 Difference]: Without dead ends: 948 [2020-12-22 09:48:31,094 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 09:48:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-12-22 09:48:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 944. [2020-12-22 09:48:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:48:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1719 transitions. [2020-12-22 09:48:31,120 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1719 transitions. Word has length 54 [2020-12-22 09:48:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,121 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1719 transitions. [2020-12-22 09:48:31,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1719 transitions. [2020-12-22 09:48:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:31,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,123 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] [2020-12-22 09:48:31,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:48:31,123 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:48:31,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092667007] [2020-12-22 09:48:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,368 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 09:48:31,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092667007] [2020-12-22 09:48:31,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759058617] [2020-12-22 09:48:31,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:31,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:31,371 INFO L87 Difference]: Start difference. First operand 944 states and 1719 transitions. Second operand 6 states. [2020-12-22 09:48:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,547 INFO L93 Difference]: Finished difference Result 1107 states and 1971 transitions. [2020-12-22 09:48:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:31,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:48:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,555 INFO L225 Difference]: With dead ends: 1107 [2020-12-22 09:48:31,555 INFO L226 Difference]: Without dead ends: 946 [2020-12-22 09:48:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-12-22 09:48:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2020-12-22 09:48:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-12-22 09:48:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1717 transitions. [2020-12-22 09:48:31,587 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1717 transitions. Word has length 54 [2020-12-22 09:48:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,587 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1717 transitions. [2020-12-22 09:48:31,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1717 transitions. [2020-12-22 09:48:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:31,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,589 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] [2020-12-22 09:48:31,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:48:31,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:48:31,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427978961] [2020-12-22 09:48:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,654 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 09:48:31,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427978961] [2020-12-22 09:48:31,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047820445] [2020-12-22 09:48:31,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,660 INFO L87 Difference]: Start difference. First operand 944 states and 1717 transitions. Second operand 3 states. [2020-12-22 09:48:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,715 INFO L93 Difference]: Finished difference Result 1242 states and 2175 transitions. [2020-12-22 09:48:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,724 INFO L225 Difference]: With dead ends: 1242 [2020-12-22 09:48:31,725 INFO L226 Difference]: Without dead ends: 1081 [2020-12-22 09:48:31,726 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 09:48:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-12-22 09:48:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2020-12-22 09:48:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 09:48:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1921 transitions. [2020-12-22 09:48:31,768 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1921 transitions. Word has length 54 [2020-12-22 09:48:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:31,768 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1921 transitions. [2020-12-22 09:48:31,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1921 transitions. [2020-12-22 09:48:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:31,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:31,770 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] [2020-12-22 09:48:31,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:48:31,771 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:31,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:48:31,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:31,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801341646] [2020-12-22 09:48:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:31,881 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 09:48:31,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801341646] [2020-12-22 09:48:31,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:31,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:31,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920286957] [2020-12-22 09:48:31,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:31,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:31,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:31,886 INFO L87 Difference]: Start difference. First operand 1079 states and 1921 transitions. Second operand 3 states. [2020-12-22 09:48:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:31,952 INFO L93 Difference]: Finished difference Result 1623 states and 2747 transitions. [2020-12-22 09:48:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:31,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:31,960 INFO L225 Difference]: With dead ends: 1623 [2020-12-22 09:48:31,960 INFO L226 Difference]: Without dead ends: 1327 [2020-12-22 09:48:31,963 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 09:48:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2020-12-22 09:48:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1325. [2020-12-22 09:48:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-12-22 09:48:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2285 transitions. [2020-12-22 09:48:32,013 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2285 transitions. Word has length 54 [2020-12-22 09:48:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:32,013 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2285 transitions. [2020-12-22 09:48:32,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2285 transitions. [2020-12-22 09:48:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:32,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:32,014 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] [2020-12-22 09:48:32,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:48:32,015 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:48:32,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:32,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745787635] [2020-12-22 09:48:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:32,110 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 09:48:32,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745787635] [2020-12-22 09:48:32,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:32,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963333034] [2020-12-22 09:48:32,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:32,113 INFO L87 Difference]: Start difference. First operand 1325 states and 2285 transitions. Second operand 3 states. [2020-12-22 09:48:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,183 INFO L93 Difference]: Finished difference Result 2313 states and 3759 transitions. [2020-12-22 09:48:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:32,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,194 INFO L225 Difference]: With dead ends: 2313 [2020-12-22 09:48:32,194 INFO L226 Difference]: Without dead ends: 1771 [2020-12-22 09:48:32,196 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 09:48:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-12-22 09:48:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1769. [2020-12-22 09:48:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2020-12-22 09:48:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2925 transitions. [2020-12-22 09:48:32,263 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2925 transitions. Word has length 54 [2020-12-22 09:48:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:32,264 INFO L481 AbstractCegarLoop]: Abstraction has 1769 states and 2925 transitions. [2020-12-22 09:48:32,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2925 transitions. [2020-12-22 09:48:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:48:32,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:32,265 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] [2020-12-22 09:48:32,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:48:32,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:48:32,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:32,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405174700] [2020-12-22 09:48:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:32,367 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 09:48:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405174700] [2020-12-22 09:48:32,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:32,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:32,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170353983] [2020-12-22 09:48:32,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:32,370 INFO L87 Difference]: Start difference. First operand 1769 states and 2925 transitions. Second operand 5 states. [2020-12-22 09:48:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,544 INFO L93 Difference]: Finished difference Result 2523 states and 4010 transitions. [2020-12-22 09:48:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:48:32,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:48:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,558 INFO L225 Difference]: With dead ends: 2523 [2020-12-22 09:48:32,558 INFO L226 Difference]: Without dead ends: 2521 [2020-12-22 09:48:32,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-12-22 09:48:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1817. [2020-12-22 09:48:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-12-22 09:48:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2965 transitions. [2020-12-22 09:48:32,724 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2965 transitions. Word has length 55 [2020-12-22 09:48:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:32,724 INFO L481 AbstractCegarLoop]: Abstraction has 1817 states and 2965 transitions. [2020-12-22 09:48:32,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2965 transitions. [2020-12-22 09:48:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:48:32,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:32,725 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] [2020-12-22 09:48:32,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:48:32,726 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:48:32,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:32,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448496028] [2020-12-22 09:48:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:32,774 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 09:48:32,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448496028] [2020-12-22 09:48:32,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797364050] [2020-12-22 09:48:32,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:32,777 INFO L87 Difference]: Start difference. First operand 1817 states and 2965 transitions. Second operand 3 states. [2020-12-22 09:48:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:32,897 INFO L93 Difference]: Finished difference Result 2880 states and 4523 transitions. [2020-12-22 09:48:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:32,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:48:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:32,911 INFO L225 Difference]: With dead ends: 2880 [2020-12-22 09:48:32,911 INFO L226 Difference]: Without dead ends: 2285 [2020-12-22 09:48:32,914 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 09:48:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2020-12-22 09:48:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2020-12-22 09:48:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:48:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3623 transitions. [2020-12-22 09:48:33,047 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3623 transitions. Word has length 56 [2020-12-22 09:48:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:33,047 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3623 transitions. [2020-12-22 09:48:33,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3623 transitions. [2020-12-22 09:48:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:48:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:33,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:33,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:48:33,049 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1815155450, now seen corresponding path program 1 times [2020-12-22 09:48:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:33,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104773674] [2020-12-22 09:48:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104773674] [2020-12-22 09:48:33,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:33,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:33,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085865789] [2020-12-22 09:48:33,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:48:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:33,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:48:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:48:33,190 INFO L87 Difference]: Start difference. First operand 2283 states and 3623 transitions. Second operand 4 states. [2020-12-22 09:48:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:44,876 INFO L93 Difference]: Finished difference Result 4538 states and 7932 transitions. [2020-12-22 09:48:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:48:44,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 09:48:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:44,900 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:48:44,900 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:48:44,903 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 09:48:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:48:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:48:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:48:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5737 transitions. [2020-12-22 09:48:45,067 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5737 transitions. Word has length 61 [2020-12-22 09:48:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:45,067 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5737 transitions. [2020-12-22 09:48:45,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:48:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5737 transitions. [2020-12-22 09:48:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:45,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:45,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:45,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:48:45,070 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:48:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:45,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387174118] [2020-12-22 09:48:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:48:45,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387174118] [2020-12-22 09:48:45,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:45,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:45,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383361130] [2020-12-22 09:48:45,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:45,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:45,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:45,186 INFO L87 Difference]: Start difference. First operand 3785 states and 5737 transitions. Second operand 6 states. [2020-12-22 09:48:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:45,764 INFO L93 Difference]: Finished difference Result 10091 states and 14778 transitions. [2020-12-22 09:48:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:45,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:45,811 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:48:45,811 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:48:45,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:48:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:48:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:48:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7865 transitions. [2020-12-22 09:48:46,115 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7865 transitions. Word has length 78 [2020-12-22 09:48:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:46,116 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7865 transitions. [2020-12-22 09:48:46,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7865 transitions. [2020-12-22 09:48:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:46,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:46,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:46,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:48:46,119 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:48:46,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:46,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554646270] [2020-12-22 09:48:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:48:46,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554646270] [2020-12-22 09:48:46,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:46,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:46,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969505689] [2020-12-22 09:48:46,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:46,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:46,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:46,231 INFO L87 Difference]: Start difference. First operand 5281 states and 7865 transitions. Second operand 6 states. [2020-12-22 09:48:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:46,876 INFO L93 Difference]: Finished difference Result 11587 states and 16906 transitions. [2020-12-22 09:48:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:46,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:46,904 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:48:46,904 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:48:46,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:48:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:48:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:48:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:48:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11037 transitions. [2020-12-22 09:48:47,528 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11037 transitions. Word has length 78 [2020-12-22 09:48:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:47,529 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 11037 transitions. [2020-12-22 09:48:47,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11037 transitions. [2020-12-22 09:48:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:47,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:47,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:47,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:48:47,532 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:48:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:47,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560082999] [2020-12-22 09:48:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:48:47,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560082999] [2020-12-22 09:48:47,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:47,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961002220] [2020-12-22 09:48:47,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:47,651 INFO L87 Difference]: Start difference. First operand 7529 states and 11037 transitions. Second operand 6 states. [2020-12-22 09:48:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:48,409 INFO L93 Difference]: Finished difference Result 13083 states and 19034 transitions. [2020-12-22 09:48:48,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:48,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:48,438 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:48:48,439 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:48:48,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:48:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:48:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:48:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:48:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13165 transitions. [2020-12-22 09:48:48,992 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13165 transitions. Word has length 78 [2020-12-22 09:48:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:48,993 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 13165 transitions. [2020-12-22 09:48:48,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13165 transitions. [2020-12-22 09:48:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:48,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:48,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:48,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:48:48,997 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:48:48,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:48,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136380958] [2020-12-22 09:48:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:49,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136380958] [2020-12-22 09:48:49,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:49,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:49,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878673523] [2020-12-22 09:48:49,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:49,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:49,149 INFO L87 Difference]: Start difference. First operand 9025 states and 13165 transitions. Second operand 3 states. [2020-12-22 09:48:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:49,523 INFO L93 Difference]: Finished difference Result 13806 states and 20037 transitions. [2020-12-22 09:48:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:49,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:48:49,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:49,541 INFO L225 Difference]: With dead ends: 13806 [2020-12-22 09:48:49,541 INFO L226 Difference]: Without dead ends: 7068 [2020-12-22 09:48:49,552 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 09:48:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2020-12-22 09:48:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 7066. [2020-12-22 09:48:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7066 states. [2020-12-22 09:48:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7066 states to 7066 states and 10382 transitions. [2020-12-22 09:48:49,923 INFO L78 Accepts]: Start accepts. Automaton has 7066 states and 10382 transitions. Word has length 80 [2020-12-22 09:48:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:49,923 INFO L481 AbstractCegarLoop]: Abstraction has 7066 states and 10382 transitions. [2020-12-22 09:48:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7066 states and 10382 transitions. [2020-12-22 09:48:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:49,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:49,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:49,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:48:49,926 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:48:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:49,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795602224] [2020-12-22 09:48:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:50,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795602224] [2020-12-22 09:48:50,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:50,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233943008] [2020-12-22 09:48:50,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:50,017 INFO L87 Difference]: Start difference. First operand 7066 states and 10382 transitions. Second operand 6 states. [2020-12-22 09:48:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:50,525 INFO L93 Difference]: Finished difference Result 11300 states and 16467 transitions. [2020-12-22 09:48:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:50,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:48:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:50,547 INFO L225 Difference]: With dead ends: 11300 [2020-12-22 09:48:50,548 INFO L226 Difference]: Without dead ends: 10242 [2020-12-22 09:48:50,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 09:48:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10242 states. [2020-12-22 09:48:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10242 to 8122. [2020-12-22 09:48:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2020-12-22 09:48:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 11886 transitions. [2020-12-22 09:48:51,117 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 11886 transitions. Word has length 80 [2020-12-22 09:48:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,118 INFO L481 AbstractCegarLoop]: Abstraction has 8122 states and 11886 transitions. [2020-12-22 09:48:51,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 11886 transitions. [2020-12-22 09:48:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:51,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:48:51,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:48:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516480390] [2020-12-22 09:48:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516480390] [2020-12-22 09:48:51,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:51,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:51,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220741563] [2020-12-22 09:48:51,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:51,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,208 INFO L87 Difference]: Start difference. First operand 8122 states and 11886 transitions. Second operand 3 states. [2020-12-22 09:48:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:51,433 INFO L93 Difference]: Finished difference Result 11030 states and 16024 transitions. [2020-12-22 09:48:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:51,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:51,445 INFO L225 Difference]: With dead ends: 11030 [2020-12-22 09:48:51,445 INFO L226 Difference]: Without dead ends: 5220 [2020-12-22 09:48:51,453 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 09:48:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2020-12-22 09:48:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5218. [2020-12-22 09:48:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2020-12-22 09:48:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 7706 transitions. [2020-12-22 09:48:51,691 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 7706 transitions. Word has length 81 [2020-12-22 09:48:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:51,692 INFO L481 AbstractCegarLoop]: Abstraction has 5218 states and 7706 transitions. [2020-12-22 09:48:51,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 7706 transitions. [2020-12-22 09:48:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:51,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:51,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:51,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:48:51,695 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:48:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:51,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686168677] [2020-12-22 09:48:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:51,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686168677] [2020-12-22 09:48:51,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:51,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:51,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118611165] [2020-12-22 09:48:51,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:51,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:51,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:51,753 INFO L87 Difference]: Start difference. First operand 5218 states and 7706 transitions. Second operand 3 states. [2020-12-22 09:48:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:51,887 INFO L93 Difference]: Finished difference Result 6674 states and 9754 transitions. [2020-12-22 09:48:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:51,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:51,896 INFO L225 Difference]: With dead ends: 6674 [2020-12-22 09:48:51,896 INFO L226 Difference]: Without dead ends: 3768 [2020-12-22 09:48:51,902 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 09:48:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-12-22 09:48:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3766. [2020-12-22 09:48:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3766 states. [2020-12-22 09:48:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5638 transitions. [2020-12-22 09:48:52,058 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5638 transitions. Word has length 81 [2020-12-22 09:48:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:52,058 INFO L481 AbstractCegarLoop]: Abstraction has 3766 states and 5638 transitions. [2020-12-22 09:48:52,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5638 transitions. [2020-12-22 09:48:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:52,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:52,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:52,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:48:52,061 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:48:52,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:52,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350226186] [2020-12-22 09:48:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:52,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350226186] [2020-12-22 09:48:52,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:52,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342828800] [2020-12-22 09:48:52,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:52,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:52,134 INFO L87 Difference]: Start difference. First operand 3766 states and 5638 transitions. Second operand 3 states. [2020-12-22 09:48:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:52,211 INFO L93 Difference]: Finished difference Result 4496 states and 6652 transitions. [2020-12-22 09:48:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:52,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:52,224 INFO L225 Difference]: With dead ends: 4496 [2020-12-22 09:48:52,224 INFO L226 Difference]: Without dead ends: 3042 [2020-12-22 09:48:52,227 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 09:48:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-12-22 09:48:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2020-12-22 09:48:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3040 states. [2020-12-22 09:48:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 4615 transitions. [2020-12-22 09:48:52,326 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 4615 transitions. Word has length 81 [2020-12-22 09:48:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:52,327 INFO L481 AbstractCegarLoop]: Abstraction has 3040 states and 4615 transitions. [2020-12-22 09:48:52,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 4615 transitions. [2020-12-22 09:48:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:52,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:52,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:48:52,333 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:48:52,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:52,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057092098] [2020-12-22 09:48:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:52,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057092098] [2020-12-22 09:48:52,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941684048] [2020-12-22 09:48:52,647 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 09:48:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:48:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:53,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:53,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:48:53,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14011472] [2020-12-22 09:48:53,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:48:53,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:48:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:48:53,573 INFO L87 Difference]: Start difference. First operand 3040 states and 4615 transitions. Second operand 12 states. [2020-12-22 09:48:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:55,309 INFO L93 Difference]: Finished difference Result 6473 states and 9264 transitions. [2020-12-22 09:48:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:48:55,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:48:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:55,322 INFO L225 Difference]: With dead ends: 6473 [2020-12-22 09:48:55,322 INFO L226 Difference]: Without dead ends: 5745 [2020-12-22 09:48:55,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:48:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2020-12-22 09:48:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4832. [2020-12-22 09:48:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2020-12-22 09:48:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6904 transitions. [2020-12-22 09:48:55,642 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6904 transitions. Word has length 81 [2020-12-22 09:48:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:55,642 INFO L481 AbstractCegarLoop]: Abstraction has 4832 states and 6904 transitions. [2020-12-22 09:48:55,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:48:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6904 transitions. [2020-12-22 09:48:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:55,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:55,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:55,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:55,857 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:48:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:55,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120698549] [2020-12-22 09:48:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:56,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120698549] [2020-12-22 09:48:56,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723132763] [2020-12-22 09:48:56,154 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 09:48:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:48:56,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:56,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:56,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:56,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:56,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109287056] [2020-12-22 09:48:56,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:56,858 INFO L87 Difference]: Start difference. First operand 4832 states and 6904 transitions. Second operand 17 states. [2020-12-22 09:48:56,991 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:48:57,169 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:48:57,394 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:48:59,359 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:00,272 INFO L93 Difference]: Finished difference Result 14950 states and 20060 transitions. [2020-12-22 09:49:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:00,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:00,297 INFO L225 Difference]: With dead ends: 14950 [2020-12-22 09:49:00,297 INFO L226 Difference]: Without dead ends: 12643 [2020-12-22 09:49:00,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2020-12-22 09:49:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 8863. [2020-12-22 09:49:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8863 states. [2020-12-22 09:49:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 12086 transitions. [2020-12-22 09:49:01,260 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 12086 transitions. Word has length 82 [2020-12-22 09:49:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:01,261 INFO L481 AbstractCegarLoop]: Abstraction has 8863 states and 12086 transitions. [2020-12-22 09:49:01,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 12086 transitions. [2020-12-22 09:49:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:01,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:01,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:01,477 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:49:01,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:01,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495423329] [2020-12-22 09:49:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:01,774 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 09:49:01,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495423329] [2020-12-22 09:49:01,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417860584] [2020-12-22 09:49:01,780 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 09:49:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:49:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:02,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:02,496 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 09:49:02,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:02,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:02,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083124005] [2020-12-22 09:49:02,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:02,501 INFO L87 Difference]: Start difference. First operand 8863 states and 12086 transitions. Second operand 17 states. [2020-12-22 09:49:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:06,381 INFO L93 Difference]: Finished difference Result 32813 states and 43309 transitions. [2020-12-22 09:49:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:06,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:49:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:06,440 INFO L225 Difference]: With dead ends: 32813 [2020-12-22 09:49:06,440 INFO L226 Difference]: Without dead ends: 27297 [2020-12-22 09:49:06,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:49:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27297 states. [2020-12-22 09:49:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27297 to 19671. [2020-12-22 09:49:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19671 states. [2020-12-22 09:49:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19671 states to 19671 states and 25820 transitions. [2020-12-22 09:49:08,172 INFO L78 Accepts]: Start accepts. Automaton has 19671 states and 25820 transitions. Word has length 82 [2020-12-22 09:49:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:08,172 INFO L481 AbstractCegarLoop]: Abstraction has 19671 states and 25820 transitions. [2020-12-22 09:49:08,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19671 states and 25820 transitions. [2020-12-22 09:49:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:08,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:08,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:08,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:49:08,375 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281225601] [2020-12-22 09:49:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:08,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281225601] [2020-12-22 09:49:08,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:08,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619080299] [2020-12-22 09:49:08,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:08,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:08,452 INFO L87 Difference]: Start difference. First operand 19671 states and 25820 transitions. Second operand 6 states. [2020-12-22 09:49:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:09,787 INFO L93 Difference]: Finished difference Result 34115 states and 44420 transitions. [2020-12-22 09:49:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:09,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:09,810 INFO L225 Difference]: With dead ends: 34115 [2020-12-22 09:49:09,810 INFO L226 Difference]: Without dead ends: 16828 [2020-12-22 09:49:09,833 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 09:49:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2020-12-22 09:49:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 16828. [2020-12-22 09:49:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16828 states. [2020-12-22 09:49:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16828 states to 16828 states and 21936 transitions. [2020-12-22 09:49:11,440 INFO L78 Accepts]: Start accepts. Automaton has 16828 states and 21936 transitions. Word has length 82 [2020-12-22 09:49:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:11,440 INFO L481 AbstractCegarLoop]: Abstraction has 16828 states and 21936 transitions. [2020-12-22 09:49:11,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 16828 states and 21936 transitions. [2020-12-22 09:49:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:11,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:11,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:11,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:11,443 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:11,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749527934] [2020-12-22 09:49:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:11,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749527934] [2020-12-22 09:49:11,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:11,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074813146] [2020-12-22 09:49:11,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:11,533 INFO L87 Difference]: Start difference. First operand 16828 states and 21936 transitions. Second operand 6 states. [2020-12-22 09:49:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:13,404 INFO L93 Difference]: Finished difference Result 27573 states and 35601 transitions. [2020-12-22 09:49:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:13,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:13,420 INFO L225 Difference]: With dead ends: 27573 [2020-12-22 09:49:13,421 INFO L226 Difference]: Without dead ends: 13155 [2020-12-22 09:49:13,435 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 09:49:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2020-12-22 09:49:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 13155. [2020-12-22 09:49:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13155 states. [2020-12-22 09:49:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13155 states to 13155 states and 17158 transitions. [2020-12-22 09:49:14,620 INFO L78 Accepts]: Start accepts. Automaton has 13155 states and 17158 transitions. Word has length 82 [2020-12-22 09:49:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:14,621 INFO L481 AbstractCegarLoop]: Abstraction has 13155 states and 17158 transitions. [2020-12-22 09:49:14,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 13155 states and 17158 transitions. [2020-12-22 09:49:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:14,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:14,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:14,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:14,624 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:14,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034416238] [2020-12-22 09:49:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:14,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034416238] [2020-12-22 09:49:14,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:14,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:14,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460776718] [2020-12-22 09:49:14,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:14,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:14,691 INFO L87 Difference]: Start difference. First operand 13155 states and 17158 transitions. Second operand 6 states. [2020-12-22 09:49:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:15,785 INFO L93 Difference]: Finished difference Result 21510 states and 27719 transitions. [2020-12-22 09:49:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:15,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:15,800 INFO L225 Difference]: With dead ends: 21510 [2020-12-22 09:49:15,800 INFO L226 Difference]: Without dead ends: 10683 [2020-12-22 09:49:15,807 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 09:49:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2020-12-22 09:49:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 10683. [2020-12-22 09:49:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10683 states. [2020-12-22 09:49:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10683 states to 10683 states and 14039 transitions. [2020-12-22 09:49:16,680 INFO L78 Accepts]: Start accepts. Automaton has 10683 states and 14039 transitions. Word has length 82 [2020-12-22 09:49:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:16,680 INFO L481 AbstractCegarLoop]: Abstraction has 10683 states and 14039 transitions. [2020-12-22 09:49:16,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10683 states and 14039 transitions. [2020-12-22 09:49:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:16,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:16,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:16,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:49:16,682 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:16,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686205837] [2020-12-22 09:49:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:16,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686205837] [2020-12-22 09:49:16,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831547568] [2020-12-22 09:49:16,924 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 09:49:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:17,488 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:17,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:17,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735578878] [2020-12-22 09:49:17,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:17,920 INFO L87 Difference]: Start difference. First operand 10683 states and 14039 transitions. Second operand 17 states. [2020-12-22 09:49:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:23,124 INFO L93 Difference]: Finished difference Result 43485 states and 54479 transitions. [2020-12-22 09:49:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:23,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:23,163 INFO L225 Difference]: With dead ends: 43485 [2020-12-22 09:49:23,163 INFO L226 Difference]: Without dead ends: 36464 [2020-12-22 09:49:23,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36464 states. [2020-12-22 09:49:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36464 to 23602. [2020-12-22 09:49:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23602 states. [2020-12-22 09:49:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23602 states to 23602 states and 30088 transitions. [2020-12-22 09:49:25,792 INFO L78 Accepts]: Start accepts. Automaton has 23602 states and 30088 transitions. Word has length 83 [2020-12-22 09:49:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:25,792 INFO L481 AbstractCegarLoop]: Abstraction has 23602 states and 30088 transitions. [2020-12-22 09:49:25,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23602 states and 30088 transitions. [2020-12-22 09:49:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:25,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:25,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:26,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:26,009 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:26,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:26,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:26,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280960839] [2020-12-22 09:49:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:49:26,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280960839] [2020-12-22 09:49:26,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:26,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844089611] [2020-12-22 09:49:26,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:26,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:26,103 INFO L87 Difference]: Start difference. First operand 23602 states and 30088 transitions. Second operand 6 states. [2020-12-22 09:49:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:28,164 INFO L93 Difference]: Finished difference Result 39695 states and 50044 transitions. [2020-12-22 09:49:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:28,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:28,187 INFO L225 Difference]: With dead ends: 39695 [2020-12-22 09:49:28,187 INFO L226 Difference]: Without dead ends: 18577 [2020-12-22 09:49:28,202 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 09:49:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18577 states. [2020-12-22 09:49:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18577 to 18577. [2020-12-22 09:49:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18577 states. [2020-12-22 09:49:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18577 states to 18577 states and 23485 transitions. [2020-12-22 09:49:30,563 INFO L78 Accepts]: Start accepts. Automaton has 18577 states and 23485 transitions. Word has length 83 [2020-12-22 09:49:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:30,563 INFO L481 AbstractCegarLoop]: Abstraction has 18577 states and 23485 transitions. [2020-12-22 09:49:30,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 18577 states and 23485 transitions. [2020-12-22 09:49:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:30,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:30,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:30,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:49:30,571 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:30,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:30,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:30,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:30,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195532025] [2020-12-22 09:49:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195532025] [2020-12-22 09:49:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466616727] [2020-12-22 09:49:32,182 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 09:49:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:32,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:33,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:33,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:49:33,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913437342] [2020-12-22 09:49:33,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:49:33,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:49:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:49:33,487 INFO L87 Difference]: Start difference. First operand 18577 states and 23485 transitions. Second operand 40 states. [2020-12-22 09:49:33,864 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:49:35,325 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:49:35,551 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:49:35,841 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:49:36,186 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:49:36,644 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:49:37,050 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:49:37,547 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:49:38,062 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:49:38,383 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:38,723 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:38,960 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:39,279 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:39,564 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:39,906 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:40,154 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:40,346 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:40,623 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:49:40,855 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 09:49:41,362 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:49:41,839 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:49:42,201 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:42,965 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:49:43,201 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:43,460 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:43,879 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:44,353 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:44,579 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:44,778 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:45,247 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:45,467 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:46,135 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:46,513 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:46,723 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:47,135 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:49:47,958 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:49,169 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:49:49,493 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:49:49,738 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:50,240 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:50,515 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:49:50,864 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:49:51,107 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:51,353 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:51,529 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:51,727 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:49:51,934 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:52,272 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:49:52,460 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:49:52,873 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:49:53,165 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:49:53,595 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:53,809 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:54,054 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:49:54,315 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:49:54,541 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:55,209 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:49:55,422 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:55,741 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:56,550 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:56,754 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:59,925 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:50:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:01,097 INFO L93 Difference]: Finished difference Result 31159 states and 39315 transitions. [2020-12-22 09:50:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:50:01,100 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:50:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:01,126 INFO L225 Difference]: With dead ends: 31159 [2020-12-22 09:50:01,127 INFO L226 Difference]: Without dead ends: 25008 [2020-12-22 09:50:01,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:50:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25008 states. [2020-12-22 09:50:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25008 to 16775. [2020-12-22 09:50:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16775 states. [2020-12-22 09:50:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 21346 transitions. [2020-12-22 09:50:03,106 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 21346 transitions. Word has length 84 [2020-12-22 09:50:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,106 INFO L481 AbstractCegarLoop]: Abstraction has 16775 states and 21346 transitions. [2020-12-22 09:50:03,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:50:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 21346 transitions. [2020-12-22 09:50:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:50:03,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:03,309 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:50:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480186400] [2020-12-22 09:50:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,736 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:04,065 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 09:50:04,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480186400] [2020-12-22 09:50:04,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243898718] [2020-12-22 09:50:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:04,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:50:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:04,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:05,255 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:50:05,779 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:50:06,059 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:50:06,136 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 09:50:06,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:06,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:50:06,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426896824] [2020-12-22 09:50:06,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:50:06,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:06,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:50:06,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:50:06,138 INFO L87 Difference]: Start difference. First operand 16775 states and 21346 transitions. Second operand 23 states. [2020-12-22 09:50:06,326 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:50:06,792 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:50:06,967 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:50:07,199 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:07,437 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:50:07,896 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:50:08,165 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:50:08,489 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:50:09,086 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:09,671 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:10,283 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:10,756 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:11,321 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:11,812 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:12,389 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:12,637 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:13,016 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:13,378 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:13,895 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:14,266 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:50:14,741 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:15,033 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:15,851 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:16,827 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:50:17,095 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:17,448 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:50:17,863 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:50:18,206 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:50:18,575 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:50:19,033 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:50:19,793 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:20,139 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:50:20,380 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:20,891 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 09:50:21,136 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:21,558 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:21,891 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:22,162 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:22,603 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:23,062 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:23,320 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:23,663 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:24,064 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:24,442 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:24,791 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:50:25,199 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:25,521 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:50:25,904 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:50:26,704 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:50:27,107 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:50:27,392 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:50:27,798 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:50:28,290 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:50:28,968 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:50:29,525 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:50:29,727 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:50:30,104 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:50:30,411 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:50:30,766 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:32,367 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:50:33,074 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:50:33,395 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 09:50:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:34,898 INFO L93 Difference]: Finished difference Result 30891 states and 39471 transitions. [2020-12-22 09:50:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:50:34,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:50:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:34,935 INFO L225 Difference]: With dead ends: 30891 [2020-12-22 09:50:34,935 INFO L226 Difference]: Without dead ends: 22210 [2020-12-22 09:50:34,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:50:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2020-12-22 09:50:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 12522. [2020-12-22 09:50:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12522 states. [2020-12-22 09:50:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 16204 transitions. [2020-12-22 09:50:36,706 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 16204 transitions. Word has length 84 [2020-12-22 09:50:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:36,706 INFO L481 AbstractCegarLoop]: Abstraction has 12522 states and 16204 transitions. [2020-12-22 09:50:36,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:50:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 16204 transitions. [2020-12-22 09:50:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:50:36,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:36,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:36,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:50:36,915 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:50:36,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:36,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353402073] [2020-12-22 09:50:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:37,309 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-12-22 09:50:37,562 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:50:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353402073] [2020-12-22 09:50:37,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082315443] [2020-12-22 09:50:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:38,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:50:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:38,627 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:39,100 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:50:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:39,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:39,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:50:39,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504348932] [2020-12-22 09:50:39,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:50:39,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:50:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:50:39,870 INFO L87 Difference]: Start difference. First operand 12522 states and 16204 transitions. Second operand 24 states. [2020-12-22 09:50:40,747 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:50:41,066 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:41,426 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:41,720 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:50:41,953 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 09:50:42,248 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:50:42,618 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:50:43,140 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:50:43,674 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:50:43,898 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:50:44,330 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:50:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:46,714 INFO L93 Difference]: Finished difference Result 19352 states and 24464 transitions. [2020-12-22 09:50:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:50:46,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:50:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:46,735 INFO L225 Difference]: With dead ends: 19352 [2020-12-22 09:50:46,736 INFO L226 Difference]: Without dead ends: 14457 [2020-12-22 09:50:46,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:50:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14457 states. [2020-12-22 09:50:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14457 to 10430. [2020-12-22 09:50:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10430 states. [2020-12-22 09:50:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 13673 transitions. [2020-12-22 09:50:48,238 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 13673 transitions. Word has length 86 [2020-12-22 09:50:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:48,238 INFO L481 AbstractCegarLoop]: Abstraction has 10430 states and 13673 transitions. [2020-12-22 09:50:48,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:50:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 13673 transitions. [2020-12-22 09:50:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:50:48,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:48,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:48,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:48,461 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1258955765, now seen corresponding path program 1 times [2020-12-22 09:50:48,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:48,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512571987] [2020-12-22 09:50:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:48,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512571987] [2020-12-22 09:50:48,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:48,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:48,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325745029] [2020-12-22 09:50:48,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:50:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:50:48,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:50:48,668 INFO L87 Difference]: Start difference. First operand 10430 states and 13673 transitions. Second operand 4 states. [2020-12-22 09:51:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:06,418 INFO L93 Difference]: Finished difference Result 14224 states and 20036 transitions. [2020-12-22 09:51:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:51:06,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 09:51:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:06,434 INFO L225 Difference]: With dead ends: 14224 [2020-12-22 09:51:06,434 INFO L226 Difference]: Without dead ends: 11932 [2020-12-22 09:51:06,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:51:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2020-12-22 09:51:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 11181. [2020-12-22 09:51:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2020-12-22 09:51:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 14426 transitions. [2020-12-22 09:51:07,817 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 14426 transitions. Word has length 132 [2020-12-22 09:51:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:07,818 INFO L481 AbstractCegarLoop]: Abstraction has 11181 states and 14426 transitions. [2020-12-22 09:51:07,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:51:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 14426 transitions. [2020-12-22 09:51:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:51:07,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:07,828 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:07,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:51:07,829 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:51:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:07,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905853995] [2020-12-22 09:51:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:08,383 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:51:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:08,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905853995] [2020-12-22 09:51:08,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876232419] [2020-12-22 09:51:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:51:08,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:51:09,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:09,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:51:09,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196693216] [2020-12-22 09:51:09,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:51:09,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:09,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:51:09,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:51:09,439 INFO L87 Difference]: Start difference. First operand 11181 states and 14426 transitions. Second operand 15 states. [2020-12-22 09:51:09,647 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:51:10,060 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-12-22 09:51:10,396 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:51:10,771 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:11,006 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:11,508 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:11,916 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:12,387 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:12,653 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:12,920 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:13,343 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:13,630 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:13,914 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:15,015 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:15,644 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:15,865 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:16,081 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:16,451 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:16,704 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:51:16,935 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:17,652 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:18,306 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:51:18,517 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:18,742 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:19,218 INFO L93 Difference]: Finished difference Result 23062 states and 29092 transitions. [2020-12-22 09:51:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:51:19,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:51:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:19,243 INFO L225 Difference]: With dead ends: 23062 [2020-12-22 09:51:19,243 INFO L226 Difference]: Without dead ends: 15608 [2020-12-22 09:51:19,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:51:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15608 states. [2020-12-22 09:51:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15608 to 15492. [2020-12-22 09:51:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15492 states. [2020-12-22 09:51:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15492 states to 15492 states and 19147 transitions. [2020-12-22 09:51:21,603 INFO L78 Accepts]: Start accepts. Automaton has 15492 states and 19147 transitions. Word has length 135 [2020-12-22 09:51:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:21,603 INFO L481 AbstractCegarLoop]: Abstraction has 15492 states and 19147 transitions. [2020-12-22 09:51:21,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:51:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 15492 states and 19147 transitions. [2020-12-22 09:51:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:51:21,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:21,609 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:51:21,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 09:51:21,824 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:51:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:21,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980913516] [2020-12-22 09:51:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:22,496 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-12-22 09:51:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980913516] [2020-12-22 09:51:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630278638] [2020-12-22 09:51:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:22,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:51:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:23,425 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:51:24,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:51:24,462 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:24,877 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:25,511 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:26,513 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:27,933 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:29,457 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:31,013 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:32,206 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:32,672 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:33,516 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:51:35,195 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:51:42,640 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:51:57,080 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:51:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:57,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:57,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:51:57,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966531060] [2020-12-22 09:51:57,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:51:57,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:57,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:51:57,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:51:57,683 INFO L87 Difference]: Start difference. First operand 15492 states and 19147 transitions. Second operand 22 states.