/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/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:35:41,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:35:41,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:35:41,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:35:41,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:35:41,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:35:41,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:35:41,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:35:41,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:35:41,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:35:41,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:35:41,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:35:41,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:35:41,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:35:41,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:35:41,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:35:41,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:35:41,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:35:41,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:35:41,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:35:41,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:35:41,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:35:41,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:35:41,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:35:41,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:35:41,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:35:41,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:35:41,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:35:41,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:35:41,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:35:41,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:35:41,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:35:41,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:35:41,474 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:35:41,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:35:41,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:35:41,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:35:41,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:35:41,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:35:41,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:35:41,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:35:41,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:35:41,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:35:41,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:35:41,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:35:41,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:35:41,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:35:41,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:35:41,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:35:41,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:35:41,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:35:41,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:35:41,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:35:41,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:35:41,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:35:41,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:35:41,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:35:41,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:35:41,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:35:41,929 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:35:41,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2020-12-22 04:35:42,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac843ba4/6ce59590bf444283b2559e110283d381/FLAGb3cac5310 [2020-12-22 04:35:42,706 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:35:42,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2020-12-22 04:35:42,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac843ba4/6ce59590bf444283b2559e110283d381/FLAGb3cac5310 [2020-12-22 04:35:42,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac843ba4/6ce59590bf444283b2559e110283d381 [2020-12-22 04:35:42,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:35:42,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:35:42,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:42,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:35:42,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:35:42,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:42" (1/1) ... [2020-12-22 04:35:42,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648e46ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:42, skipping insertion in model container [2020-12-22 04:35:42,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:42" (1/1) ... [2020-12-22 04:35:42,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:35:42,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:35:43,056 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/loops-crafted-1/Mono1_1-1.c[313,326] [2020-12-22 04:35:43,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:43,082 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:35:43,098 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/loops-crafted-1/Mono1_1-1.c[313,326] [2020-12-22 04:35:43,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:43,119 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:35:43,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43 WrapperNode [2020-12-22 04:35:43,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:43,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:43,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:35:43,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:35:43,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:43,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:35:43,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:35:43,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:35:43,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (1/1) ... [2020-12-22 04:35:43,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:35:43,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:35:43,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:35:43,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:35:43,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (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 04:35:43,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:35:43,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:35:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:35:43,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:35:43,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:35:43,553 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:35:43,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:43 BoogieIcfgContainer [2020-12-22 04:35:43,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:35:43,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:35:43,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:35:43,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:35:43,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:35:42" (1/3) ... [2020-12-22 04:35:43,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561b978a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:43, skipping insertion in model container [2020-12-22 04:35:43,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:43" (2/3) ... [2020-12-22 04:35:43,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561b978a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:43, skipping insertion in model container [2020-12-22 04:35:43,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:43" (3/3) ... [2020-12-22 04:35:43,566 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-12-22 04:35:43,573 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:35:43,578 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:35:43,603 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:35:43,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:35:43,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:35:43,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:35:43,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:35:43,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:35:43,635 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:35:43,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:35:43,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:35:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:35:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:35:43,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:43,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:35:43,659 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:35:43,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:43,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569391000] [2020-12-22 04:35:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:43,914 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 04:35:43,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569391000] [2020-12-22 04:35:43,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:43,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:35:43,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734625345] [2020-12-22 04:35:43,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:35:43,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:43,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:35:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:35:43,952 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:35:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:43,968 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:35:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:35:43,970 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:35:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:43,987 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:35:43,987 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:35:43,990 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 04:35:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:35:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:35:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:35:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:35:44,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:35:44,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:44,031 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:35:44,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:35:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:35:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:35:44,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:44,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:35:44,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:35:44,034 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:35:44,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:44,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554950724] [2020-12-22 04:35:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:44,165 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 04:35:44,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554950724] [2020-12-22 04:35:44,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:44,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:35:44,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167912978] [2020-12-22 04:35:44,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:44,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:44,170 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:35:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:44,200 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-22 04:35:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:44,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:35:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:44,202 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:35:44,202 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:35:44,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 04:35:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:35:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:35:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:35:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:35:44,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:35:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:35:44,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:35:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:35:44,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:44,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:44,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:35:44,210 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-22 04:35:44,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:44,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382824248] [2020-12-22 04:35:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:44,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382824248] [2020-12-22 04:35:44,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437451123] [2020-12-22 04:35:44,319 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 04:35:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:44,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:35:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:35:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139118999] [2020-12-22 04:35:44,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:35:44,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:35:44,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:44,447 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-22 04:35:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:44,493 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:35:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:35:44,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:35:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:44,495 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:35:44,495 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:35:44,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:35:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:35:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:35:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 04:35:44,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-22 04:35:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:44,500 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 04:35:44,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:35:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 04:35:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:35:44,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:44,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:44,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:35:44,716 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-22 04:35:44,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:44,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504241742] [2020-12-22 04:35:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:44,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504241742] [2020-12-22 04:35:44,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341365559] [2020-12-22 04:35:44,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:35:44,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:35:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:45,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:35:45,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363311069] [2020-12-22 04:35:45,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:35:45,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:35:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:35:45,098 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 04:35:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:45,169 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:35:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:35:45,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:35:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:45,171 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:35:45,171 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:35:45,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:35:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:35:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:35:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:35:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:35:45,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-22 04:35:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:45,178 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:35:45,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:35:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:35:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:35:45,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:45,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:45,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:45,393 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-22 04:35:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:45,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447899953] [2020-12-22 04:35:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447899953] [2020-12-22 04:35:45,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716739079] [2020-12-22 04:35:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:35:45,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:35:45,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:45,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:35:45,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:35:45,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:45,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 04:35:45,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382600394] [2020-12-22 04:35:45,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:45,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:45,759 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-22 04:35:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:45,830 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 04:35:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:45,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:35:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:45,833 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:35:45,833 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:35:45,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:35:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:35:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:35:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 04:35:45,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 04:35:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:45,843 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 04:35:45,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 04:35:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:35:45,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:45,844 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-22 04:35:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684075880] [2020-12-22 04:35:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684075880] [2020-12-22 04:35:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172252694] [2020-12-22 04:35:46,288 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 04:35:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:35:46,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:46,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:35:46,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374897860] [2020-12-22 04:35:46,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:35:46,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:46,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:35:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:46,480 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 04:35:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,571 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 04:35:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:35:46,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:35:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,572 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:35:46,573 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:35:46,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:35:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:35:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:35:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:35:46,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 04:35:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,578 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:35:46,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:35:46,579 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:35:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:35:46,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,580 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,794 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-22 04:35:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295327023] [2020-12-22 04:35:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295327023] [2020-12-22 04:35:46,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254078560] [2020-12-22 04:35:46,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:35:46,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:46,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:35:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:47,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:47,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-22 04:35:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019280138] [2020-12-22 04:35:47,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:35:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:35:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:47,083 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-22 04:35:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:47,193 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:35:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:35:47,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:35:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:47,196 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:35:47,196 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:35:47,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:35:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:35:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:35:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 04:35:47,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-22 04:35:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:47,211 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 04:35:47,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:35:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 04:35:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:35:47,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:47,213 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:47,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:35:47,431 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-22 04:35:47,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:47,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604936295] [2020-12-22 04:35:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:47,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604936295] [2020-12-22 04:35:47,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674484519] [2020-12-22 04:35:47,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:35:47,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:35:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:35:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:35:47,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:47,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 04:35:47,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359149478] [2020-12-22 04:35:47,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:35:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:35:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:47,709 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-22 04:35:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:47,900 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-22 04:35:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:35:47,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:35:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:47,902 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:35:47,902 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:35:47,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:35:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:35:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-22 04:35:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:35:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:35:47,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-22 04:35:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:47,908 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:35:47,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:35:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:35:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:35:47,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:47,910 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:48,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:48,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-22 04:35:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:48,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603563926] [2020-12-22 04:35:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603563926] [2020-12-22 04:35:48,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17165265] [2020-12-22 04:35:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:35:48,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:35:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:48,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:48,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:35:48,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841757479] [2020-12-22 04:35:48,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:35:48,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:35:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:48,456 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-22 04:35:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:48,566 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-22 04:35:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:35:48,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:35:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:48,568 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:35:48,568 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:35:48,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:35:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:35:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:35:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:35:48,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-22 04:35:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:48,574 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:35:48,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:35:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:35:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:35:48,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:48,575 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:48,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:48,789 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-22 04:35:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529888950] [2020-12-22 04:35:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529888950] [2020-12-22 04:35:48,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334315845] [2020-12-22 04:35:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 04:35:49,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:35:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:49,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:35:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:49,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:49,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:35:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97198955] [2020-12-22 04:35:49,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:35:49,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:35:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:49,317 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-22 04:35:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:49,452 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 04:35:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:35:49,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:35:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:49,453 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:35:49,453 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:35:49,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:35:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:35:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:35:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 04:35:49,459 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-22 04:35:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:49,460 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 04:35:49,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:35:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 04:35:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:35:49,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:49,461 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:49,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:35:49,668 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-22 04:35:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:49,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221046899] [2020-12-22 04:35:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221046899] [2020-12-22 04:35:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609529327] [2020-12-22 04:35:49,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 04:35:49,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:35:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:35:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:50,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:50,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2020-12-22 04:35:50,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213701519] [2020-12-22 04:35:50,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:35:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:35:50,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:50,109 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 13 states. [2020-12-22 04:35:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:50,264 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-22 04:35:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:35:50,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-22 04:35:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:50,267 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:35:50,268 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:35:50,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:35:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:35:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:35:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:35:50,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-12-22 04:35:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:50,284 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:35:50,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:35:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:35:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:35:50,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:50,285 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:50,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:50,500 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-22 04:35:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:50,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061185158] [2020-12-22 04:35:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061185158] [2020-12-22 04:35:50,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780100668] [2020-12-22 04:35:50,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:50,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:35:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:50,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:50,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:35:50,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892017017] [2020-12-22 04:35:50,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:35:50,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:35:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:50,910 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2020-12-22 04:35:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:51,071 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 04:35:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:35:51,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 04:35:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:51,073 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:35:51,073 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:35:51,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:35:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:35:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:35:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 04:35:51,078 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-22 04:35:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:51,079 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 04:35:51,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:35:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 04:35:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:35:51,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:51,080 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:51,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:51,295 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:51,296 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-22 04:35:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:51,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632147340] [2020-12-22 04:35:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:51,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632147340] [2020-12-22 04:35:51,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100603734] [2020-12-22 04:35:51,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:51,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:51,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:35:51,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:51,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:51,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-22 04:35:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780209735] [2020-12-22 04:35:51,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:35:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:35:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:51,728 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2020-12-22 04:35:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:51,969 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-22 04:35:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:35:51,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:35:51,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:51,970 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:35:51,970 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:35:51,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:35:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:35:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:35:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 04:35:51,976 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-22 04:35:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:51,976 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 04:35:51,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:35:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 04:35:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:35:51,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:51,978 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:52,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:35:52,194 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:52,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-22 04:35:52,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:52,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998860570] [2020-12-22 04:35:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998860570] [2020-12-22 04:35:52,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986977452] [2020-12-22 04:35:52,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:35:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:35:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-22 04:35:52,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:52,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-22 04:35:52,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911161097] [2020-12-22 04:35:52,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:35:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:35:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:52,774 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2020-12-22 04:35:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:53,218 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-12-22 04:35:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:35:53,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:35:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:53,220 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:35:53,220 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:35:53,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:35:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:35:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:35:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:35:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 04:35:53,226 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-22 04:35:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:53,227 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 04:35:53,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:35:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 04:35:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:35:53,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:53,228 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:53,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:35:53,442 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-22 04:35:53,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:53,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133574190] [2020-12-22 04:35:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133574190] [2020-12-22 04:35:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653189361] [2020-12-22 04:35:53,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:53,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:53,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:35:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:53,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:53,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:35:53,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221262540] [2020-12-22 04:35:53,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:35:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:35:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:53,916 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-12-22 04:35:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:54,209 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-22 04:35:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:35:54,210 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-22 04:35:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:54,212 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:35:54,212 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:35:54,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:35:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:35:54,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:35:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 04:35:54,231 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-12-22 04:35:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:54,231 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 04:35:54,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:35:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 04:35:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:35:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:54,232 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:54,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:35:54,446 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-22 04:35:54,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:54,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866059517] [2020-12-22 04:35:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866059517] [2020-12-22 04:35:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069020678] [2020-12-22 04:35:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:55,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 04:35:55,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:35:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:55,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:55,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:35:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661327751] [2020-12-22 04:35:55,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:35:55,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:55,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:35:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:55,381 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 17 states. [2020-12-22 04:35:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:55,727 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-22 04:35:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:35:55,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-22 04:35:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:55,728 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:35:55,728 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:35:55,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:35:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:35:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:35:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 04:35:55,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-12-22 04:35:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:55,735 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 04:35:55,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:35:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 04:35:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:35:55,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:55,736 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:55,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:55,941 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-22 04:35:55,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:55,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481254716] [2020-12-22 04:35:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481254716] [2020-12-22 04:35:56,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384402668] [2020-12-22 04:35:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:56,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:35:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:35:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 04:35:56,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:56,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-12-22 04:35:56,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073529843] [2020-12-22 04:35:56,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:35:56,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:56,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:35:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:35:56,763 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2020-12-22 04:35:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:57,496 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-12-22 04:35:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:35:57,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:35:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:57,498 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:35:57,498 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:35:57,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:35:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:35:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:35:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:35:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:35:57,510 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-22 04:35:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:57,512 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:35:57,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:35:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:35:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:35:57,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:57,519 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:57,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:35:57,720 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-22 04:35:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:57,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778739786] [2020-12-22 04:35:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:35:58,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778739786] [2020-12-22 04:35:58,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649839672] [2020-12-22 04:35:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:35:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:35:58,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:58,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:35:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274155593] [2020-12-22 04:35:58,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:35:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:58,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:35:58,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:35:58,237 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-22 04:35:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:58,690 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 04:35:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:35:58,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-22 04:35:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:58,692 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:35:58,692 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:35:58,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:35:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:35:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:35:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:35:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:35:58,698 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-22 04:35:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:58,698 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:35:58,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:35:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:35:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:35:58,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:58,699 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:58,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:35:58,903 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-22 04:35:58,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:58,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691632564] [2020-12-22 04:35:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:35:59,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691632564] [2020-12-22 04:35:59,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627634431] [2020-12-22 04:35:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:59,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:35:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:59,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:59,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-22 04:35:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177571493] [2020-12-22 04:35:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:35:59,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:35:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:35:59,600 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-22 04:36:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:00,197 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-22 04:36:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:36:00,198 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:36:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:00,199 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:36:00,199 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:36:00,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:36:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:36:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:36:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:36:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:36:00,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-22 04:36:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:00,206 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:36:00,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:36:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:36:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:36:00,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:00,207 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:00,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:00,412 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-22 04:36:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:00,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583530302] [2020-12-22 04:36:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:36:00,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583530302] [2020-12-22 04:36:00,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942242662] [2020-12-22 04:36:00,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:00,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:36:00,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:00,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:36:00,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 04:36:01,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:01,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-22 04:36:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119703548] [2020-12-22 04:36:01,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:36:01,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:36:01,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:01,428 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-22 04:36:02,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:02,937 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-22 04:36:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:36:02,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:36:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:02,938 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:36:02,938 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:36:02,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:36:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:36:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-22 04:36:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:36:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 04:36:02,945 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-22 04:36:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:02,945 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 04:36:02,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:36:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 04:36:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:36:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:02,946 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:03,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:03,149 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-22 04:36:03,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:03,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031398993] [2020-12-22 04:36:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:03,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031398993] [2020-12-22 04:36:03,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558161334] [2020-12-22 04:36:03,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:03,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:36:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:03,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:03,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:36:03,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833644146] [2020-12-22 04:36:03,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:36:03,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:03,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:36:03,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:36:03,814 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2020-12-22 04:36:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:04,369 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-22 04:36:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:36:04,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-22 04:36:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:04,370 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:36:04,371 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:36:04,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:36:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:36:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:36:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:36:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 04:36:04,391 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-12-22 04:36:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:04,391 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 04:36:04,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:36:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 04:36:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:36:04,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:04,396 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:04,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:04,597 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-22 04:36:04,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:04,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314474300] [2020-12-22 04:36:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:05,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314474300] [2020-12-22 04:36:05,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320675661] [2020-12-22 04:36:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:06,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:36:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:06,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:36:06,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:06,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:06,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:36:06,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429389647] [2020-12-22 04:36:06,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:36:06,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:36:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:36:06,949 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-12-22 04:36:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:07,595 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-12-22 04:36:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:36:07,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-22 04:36:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:07,599 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:36:07,599 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:36:07,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:36:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:36:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:36:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:36:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 04:36:07,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-12-22 04:36:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:07,606 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 04:36:07,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:36:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 04:36:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:36:07,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:07,607 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:07,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:36:07,812 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-22 04:36:07,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:07,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510910159] [2020-12-22 04:36:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:08,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510910159] [2020-12-22 04:36:08,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819271679] [2020-12-22 04:36:08,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:09,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 04:36:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:36:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 337 proven. 176 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-22 04:36:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2020-12-22 04:36:11,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612995359] [2020-12-22 04:36:11,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:36:11,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:11,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:36:11,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:36:11,078 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 37 states. [2020-12-22 04:36:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:12,509 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-12-22 04:36:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:36:12,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2020-12-22 04:36:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:12,511 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:36:12,511 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:36:12,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:36:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:36:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-12-22 04:36:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:36:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 04:36:12,519 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-12-22 04:36:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:12,519 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 04:36:12,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:36:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 04:36:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:36:12,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:12,520 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:12,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:36:12,724 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2020-12-22 04:36:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:12,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188634669] [2020-12-22 04:36:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188634669] [2020-12-22 04:36:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18592940] [2020-12-22 04:36:13,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:36:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:13,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:13,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:36:13,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509692608] [2020-12-22 04:36:13,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:36:13,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:36:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:13,481 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-12-22 04:36:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:14,223 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-22 04:36:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:36:14,224 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-22 04:36:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:14,225 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:36:14,225 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:36:14,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:36:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:36:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:36:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 04:36:14,231 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-12-22 04:36:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:14,232 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 04:36:14,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:36:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 04:36:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:36:14,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:14,233 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:14,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:14,436 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:14,437 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2020-12-22 04:36:14,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:14,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302447266] [2020-12-22 04:36:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:15,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302447266] [2020-12-22 04:36:15,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315482463] [2020-12-22 04:36:15,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:15,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:15,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:36:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:15,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:15,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2020-12-22 04:36:15,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889765435] [2020-12-22 04:36:15,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:36:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:36:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:36:15,497 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-12-22 04:36:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:16,487 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-22 04:36:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:36:16,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:36:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:16,489 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:36:16,489 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:36:16,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:36:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:36:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:36:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:36:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 04:36:16,495 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-12-22 04:36:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:16,495 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 04:36:16,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:36:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 04:36:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:36:16,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:16,496 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:16,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:36:16,704 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2020-12-22 04:36:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:16,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229674075] [2020-12-22 04:36:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:17,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229674075] [2020-12-22 04:36:17,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759234784] [2020-12-22 04:36:17,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:17,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 04:36:17,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:36:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-22 04:36:18,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:18,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-22 04:36:18,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251306442] [2020-12-22 04:36:18,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:36:18,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:36:18,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:36:18,022 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2020-12-22 04:36:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:20,527 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-22 04:36:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:36:20,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:36:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:20,528 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:36:20,528 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:36:20,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:36:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-22 04:36:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:36:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 04:36:20,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2020-12-22 04:36:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:20,537 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 04:36:20,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:36:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 04:36:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:36:20,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:20,538 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:20,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:20,752 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2020-12-22 04:36:20,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:20,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415273519] [2020-12-22 04:36:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:21,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415273519] [2020-12-22 04:36:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050688534] [2020-12-22 04:36:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:21,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:21,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:36:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:21,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:21,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:36:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797116709] [2020-12-22 04:36:21,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:36:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:36:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:21,686 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-12-22 04:36:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:22,704 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-22 04:36:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:36:22,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-12-22 04:36:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:22,705 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:36:22,706 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:36:22,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:36:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:36:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:36:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:36:22,715 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-12-22 04:36:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:22,716 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:36:22,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:36:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:36:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:36:22,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:22,717 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:22,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:36:22,919 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2020-12-22 04:36:22,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:22,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997643209] [2020-12-22 04:36:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997643209] [2020-12-22 04:36:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626013028] [2020-12-22 04:36:23,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:33,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-22 04:36:33,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:36:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 252 proven. 756 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:33,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:33,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 31 [2020-12-22 04:36:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979146495] [2020-12-22 04:36:33,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:36:33,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:36:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:33,812 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2020-12-22 04:36:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:35,001 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-22 04:36:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:36:35,002 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-12-22 04:36:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:35,003 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:36:35,003 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:36:35,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:36:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:36:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:36:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:36:35,010 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-22 04:36:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:35,011 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:36:35,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:36:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:36:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:36:35,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:35,012 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:35,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:36:35,213 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:35,213 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2020-12-22 04:36:35,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:35,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964608570] [2020-12-22 04:36:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964608570] [2020-12-22 04:36:35,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289798235] [2020-12-22 04:36:35,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:37,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:36:37,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:36:37,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 49 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-22 04:36:38,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:38,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-22 04:36:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211351441] [2020-12-22 04:36:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:36:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:36:38,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:36:38,539 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2020-12-22 04:36:40,823 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:36:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:42,874 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-12-22 04:36:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:36:42,874 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:36:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:42,875 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:36:42,875 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:36:42,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:36:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:36:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-12-22 04:36:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:36:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 04:36:42,883 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2020-12-22 04:36:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:42,883 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 04:36:42,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:36:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 04:36:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:36:42,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:42,884 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:43,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:36:43,089 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-22 04:36:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:43,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321806539] [2020-12-22 04:36:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321806539] [2020-12-22 04:36:43,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682308740] [2020-12-22 04:36:43,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:36:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:44,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:44,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:36:44,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012499727] [2020-12-22 04:36:44,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:36:44,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:36:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:44,273 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-22 04:36:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:45,628 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-22 04:36:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:36:45,629 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-22 04:36:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:45,630 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:36:45,630 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:36:45,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:36:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:36:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:36:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 04:36:45,636 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-22 04:36:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:45,637 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 04:36:45,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:36:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 04:36:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:36:45,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:45,638 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:45,852 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-22 04:36:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:45,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493135478] [2020-12-22 04:36:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:46,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493135478] [2020-12-22 04:36:46,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799931575] [2020-12-22 04:36:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:46,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:46,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:46,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:36:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:47,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:47,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-22 04:36:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774590964] [2020-12-22 04:36:47,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:36:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:36:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:47,533 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-22 04:36:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:49,384 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-22 04:36:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:36:49,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:36:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:49,386 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:36:49,386 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:36:49,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:36:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:36:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:36:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-22 04:36:49,395 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-22 04:36:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:49,395 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-22 04:36:49,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:36:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-22 04:36:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:36:49,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:49,396 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:49,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:36:49,610 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-22 04:36:49,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:49,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964414718] [2020-12-22 04:36:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:50,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964414718] [2020-12-22 04:36:50,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852600603] [2020-12-22 04:36:50,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:50,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:36:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:36:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 493 proven. 64 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-22 04:36:53,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:53,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-22 04:36:53,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519167243] [2020-12-22 04:36:53,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:36:53,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:36:53,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:36:53,614 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-22 04:36:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:56,726 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-22 04:36:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:36:56,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:36:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:56,731 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:36:56,732 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:36:56,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:36:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:36:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:36:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:36:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 04:36:56,740 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-22 04:36:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:56,740 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 04:36:56,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:36:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 04:36:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:36:56,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:56,741 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:56,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:56,945 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:56,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-22 04:36:56,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:56,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225208520] [2020-12-22 04:36:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:36:58,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225208520] [2020-12-22 04:36:58,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127588713] [2020-12-22 04:36:58,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:58,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:36:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:36:58,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:58,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:36:58,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853385270] [2020-12-22 04:36:58,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:36:58,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:58,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:36:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:36:58,413 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-22 04:37:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:00,119 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-22 04:37:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:37:00,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-22 04:37:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:00,121 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:37:00,121 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:37:00,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:37:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:37:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 04:37:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:37:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 04:37:00,127 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-22 04:37:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:00,127 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 04:37:00,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:37:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 04:37:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:37:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:00,128 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:00,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:37:00,329 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-22 04:37:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:00,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178796609] [2020-12-22 04:37:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:37:01,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178796609] [2020-12-22 04:37:01,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832158741] [2020-12-22 04:37:01,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:22,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 04:37:22,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:37:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:37:23,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:23,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40] total 41 [2020-12-22 04:37:23,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307727] [2020-12-22 04:37:23,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:37:23,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:37:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:37:23,159 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 41 states. [2020-12-22 04:37:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:25,215 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-22 04:37:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:37:25,216 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-12-22 04:37:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:25,217 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:37:25,217 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:37:25,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:37:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:37:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 04:37:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:37:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 04:37:25,224 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-22 04:37:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:25,225 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 04:37:25,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:37:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 04:37:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:37:25,225 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:25,226 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:25,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:37:25,426 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-22 04:37:25,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471632871] [2020-12-22 04:37:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:37:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471632871] [2020-12-22 04:37:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481843414] [2020-12-22 04:37:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:32,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-22 04:37:32,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:32,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:37:32,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 813 proven. 382 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-12-22 04:37:37,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:37,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21] total 54 [2020-12-22 04:37:37,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328704289] [2020-12-22 04:37:37,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:37:37,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:37:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:37:37,132 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 54 states. [2020-12-22 04:37:41,977 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:37:44,318 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:37:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:45,653 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-12-22 04:37:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:37:45,654 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 88 [2020-12-22 04:37:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:45,655 INFO L225 Difference]: With dead ends: 135 [2020-12-22 04:37:45,655 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 04:37:45,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=658, Invalid=3248, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:37:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 04:37:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-12-22 04:37:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:37:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-22 04:37:45,664 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2020-12-22 04:37:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:45,665 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-22 04:37:45,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:37:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-22 04:37:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:37:45,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:45,666 INFO L422 BasicCegarLoop]: trace histogram [44, 33, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:45,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:37:45,871 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:45,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:45,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1993007499, now seen corresponding path program 31 times [2020-12-22 04:37:45,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:45,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920531131] [2020-12-22 04:37:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:37:47,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920531131] [2020-12-22 04:37:47,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925781314] [2020-12-22 04:37:47,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:37:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 714 proven. 1122 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:37:47,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:47,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:37:47,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987566592] [2020-12-22 04:37:47,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:37:47,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:37:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:37:47,565 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 37 states. [2020-12-22 04:37:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:49,692 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-22 04:37:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:37:49,693 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2020-12-22 04:37:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:49,694 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:37:49,694 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:37:49,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:37:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:37:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 04:37:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:37:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-22 04:37:49,702 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-12-22 04:37:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:49,703 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-22 04:37:49,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:37:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-22 04:37:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:37:49,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:49,704 INFO L422 BasicCegarLoop]: trace histogram [45, 34, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:49,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:37:49,917 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2146245714, now seen corresponding path program 32 times [2020-12-22 04:37:49,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:49,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125648423] [2020-12-22 04:37:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 1190 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:37:51,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125648423] [2020-12-22 04:37:51,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128621941] [2020-12-22 04:37:51,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:51,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:37:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:37:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:37:52,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:52,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 48] total 49 [2020-12-22 04:37:52,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616089273] [2020-12-22 04:37:52,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:37:52,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:37:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:37:52,423 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 49 states. [2020-12-22 04:37:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:55,380 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-12-22 04:37:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:37:55,381 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:37:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:55,382 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:37:55,382 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:37:55,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=130, Invalid=2222, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:37:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:37:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-22 04:37:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:37:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-22 04:37:55,391 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-12-22 04:37:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:55,391 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-22 04:37:55,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:37:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-22 04:37:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:37:55,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:55,392 INFO L422 BasicCegarLoop]: trace histogram [46, 35, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:55,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:37:55,608 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:55,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1466099985, now seen corresponding path program 33 times [2020-12-22 04:37:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:55,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758823873] [2020-12-22 04:37:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 1260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:37:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758823873] [2020-12-22 04:37:57,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834356966] [2020-12-22 04:37:57,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:57,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:37:57,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:37:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 805 proven. 121 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-22 04:37:59,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:59,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-22 04:37:59,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227976602] [2020-12-22 04:37:59,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:37:59,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:37:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2168, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:37:59,578 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 50 states. [2020-12-22 04:38:03,937 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2020-12-22 04:38:08,683 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:38:10,922 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:38:13,694 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:38:15,485 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:38:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:38:17,044 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-12-22 04:38:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:38:17,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-22 04:38:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:38:17,045 INFO L225 Difference]: With dead ends: 133 [2020-12-22 04:38:17,046 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:38:17,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=420, Invalid=3362, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:38:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:38:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-12-22 04:38:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:38:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 04:38:17,053 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 98 [2020-12-22 04:38:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:38:17,054 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 04:38:17,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:38:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 04:38:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:38:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:38:17,055 INFO L422 BasicCegarLoop]: trace histogram [48, 36, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:38:17,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:38:17,258 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:38:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:38:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash 144826137, now seen corresponding path program 34 times [2020-12-22 04:38:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:38:17,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748339380] [2020-12-22 04:38:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:38:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:38:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:38:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748339380] [2020-12-22 04:38:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062520490] [2020-12-22 04:38:18,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:38:18,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:38:18,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:38:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:38:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:38:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 851 proven. 1332 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:38:19,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:38:19,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:38:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039250029] [2020-12-22 04:38:19,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:38:19,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:38:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:38:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:38:19,315 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 40 states. [2020-12-22 04:38:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:38:21,966 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2020-12-22 04:38:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:38:21,967 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 102 [2020-12-22 04:38:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:38:21,969 INFO L225 Difference]: With dead ends: 136 [2020-12-22 04:38:21,969 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:38:21,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:38:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:38:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 04:38:21,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:38:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-22 04:38:21,978 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-22 04:38:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:38:21,978 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-22 04:38:21,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:38:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-22 04:38:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:38:21,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:38:21,979 INFO L422 BasicCegarLoop]: trace histogram [49, 37, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:38:22,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:38:22,191 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:38:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:38:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 404950588, now seen corresponding path program 35 times [2020-12-22 04:38:22,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:38:22,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266641424] [2020-12-22 04:38:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:38:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:38:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 1406 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:38:23,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266641424] [2020-12-22 04:38:23,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049250419] [2020-12-22 04:38:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:38:56,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2020-12-22 04:38:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:38:56,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:38:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:38:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:38:57,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:38:57,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 42 [2020-12-22 04:38:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893651684] [2020-12-22 04:38:57,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:38:57,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:38:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:38:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:38:57,331 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 42 states. [2020-12-22 04:39:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:00,198 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-12-22 04:39:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:39:00,199 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 104 [2020-12-22 04:39:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:00,200 INFO L225 Difference]: With dead ends: 138 [2020-12-22 04:39:00,200 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 04:39:00,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:39:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 04:39:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-22 04:39:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 04:39:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-22 04:39:00,209 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2020-12-22 04:39:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:00,210 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-22 04:39:00,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:39:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-22 04:39:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 04:39:00,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:00,211 INFO L422 BasicCegarLoop]: trace histogram [50, 38, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:00,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:39:00,417 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1276444831, now seen corresponding path program 36 times [2020-12-22 04:39:00,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232697997] [2020-12-22 04:39:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 1482 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:02,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232697997] [2020-12-22 04:39:02,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070708123] [2020-12-22 04:39:02,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:07,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2020-12-22 04:39:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:39:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 779 proven. 1640 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:39:08,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:08,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43] total 44 [2020-12-22 04:39:08,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719200745] [2020-12-22 04:39:08,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:39:08,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:39:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:39:08,410 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 44 states. [2020-12-22 04:39:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:11,492 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-12-22 04:39:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:39:11,494 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 106 [2020-12-22 04:39:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:11,495 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:39:11,495 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:39:11,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=1768, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:39:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:39:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-22 04:39:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:39:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 04:39:11,504 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 106 [2020-12-22 04:39:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:11,504 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 04:39:11,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:39:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 04:39:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:39:11,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:11,505 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:11,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:11,709 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-22 04:39:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:11,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568714323] [2020-12-22 04:39:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568714323] [2020-12-22 04:39:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124660120] [2020-12-22 04:39:13,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:39:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:13,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:13,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:39:13,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384468692] [2020-12-22 04:39:13,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:39:13,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:39:13,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:39:13,929 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-22 04:39:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:17,068 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-22 04:39:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:39:17,069 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-22 04:39:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:17,071 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:39:17,071 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:39:17,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:39:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:39:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-22 04:39:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:39:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-22 04:39:17,080 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-22 04:39:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:17,080 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-22 04:39:17,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:39:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-22 04:39:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:39:17,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:17,081 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:17,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:17,282 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-22 04:39:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:17,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327802830] [2020-12-22 04:39:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:19,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327802830] [2020-12-22 04:39:19,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690924859] [2020-12-22 04:39:19,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:19,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:39:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-22 04:39:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:39:20,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:20,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-22 04:39:20,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141855661] [2020-12-22 04:39:20,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:39:20,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:39:20,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:39:20,703 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2020-12-22 04:39:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:25,188 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-12-22 04:39:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:39:25,190 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:39:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:25,192 INFO L225 Difference]: With dead ends: 144 [2020-12-22 04:39:25,192 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:39:25,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:39:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:39:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-22 04:39:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:39:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 04:39:25,202 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2020-12-22 04:39:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:25,203 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 04:39:25,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:39:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 04:39:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:39:25,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:25,204 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:25,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:39:25,407 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2020-12-22 04:39:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:25,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096786307] [2020-12-22 04:39:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:27,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096786307] [2020-12-22 04:39:27,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510493953] [2020-12-22 04:39:27,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:28,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-22 04:39:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:39:28,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-22 04:39:30,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:30,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-22 04:39:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632761853] [2020-12-22 04:39:30,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:39:30,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:39:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:39:30,006 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2020-12-22 04:39:34,856 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 63 DAG size of output: 15 [2020-12-22 04:39:37,112 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 12 [2020-12-22 04:39:39,182 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2020-12-22 04:39:41,656 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:39:43,659 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:39:45,410 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-22 04:39:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:50,392 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-12-22 04:39:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:39:50,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-22 04:39:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:50,394 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:39:50,394 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:39:50,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=932, Invalid=3898, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:39:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:39:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-12-22 04:39:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 04:39:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-12-22 04:39:50,404 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2020-12-22 04:39:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:50,404 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-12-22 04:39:50,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:39:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-12-22 04:39:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 04:39:50,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:50,405 INFO L422 BasicCegarLoop]: trace histogram [55, 42, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:50,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:50,608 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash -675248560, now seen corresponding path program 40 times [2020-12-22 04:39:50,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:50,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588847239] [2020-12-22 04:39:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:39:53,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588847239] [2020-12-22 04:39:53,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450466633] [2020-12-22 04:39:53,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:53,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:39:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:39:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:39:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:53,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:39:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092740034] [2020-12-22 04:39:53,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:39:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:39:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:39:53,655 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 46 states. [2020-12-22 04:39:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:57,847 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2020-12-22 04:39:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:39:57,849 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2020-12-22 04:39:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:57,850 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:39:57,850 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:39:57,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:39:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:39:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-12-22 04:39:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 04:39:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-12-22 04:39:57,860 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2020-12-22 04:39:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:57,860 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-12-22 04:39:57,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:39:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-12-22 04:39:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 04:39:57,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:57,861 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1]