/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/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:51:24,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:51:24,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:51:24,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:51:24,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:51:24,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:51:24,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:51:24,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:51:24,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:51:24,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:51:24,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:51:24,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:51:24,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:51:24,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:51:24,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:51:24,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:51:24,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:51:24,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:51:24,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:51:24,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:51:24,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:51:24,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:51:24,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:51:24,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:51:24,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:51:24,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:51:24,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:51:24,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:51:24,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:51:24,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:51:24,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:51:24,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:51:24,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:51:24,737 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:51:24,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:51:24,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:51:24,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:51:24,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:51:24,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:51:24,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:51:24,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:51:24,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:51:24,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:51:24,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:51:24,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:51:24,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:51:24,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:51:24,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:51:24,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:51:24,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:51:24,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:51:24,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:51:24,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:51:24,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:51:24,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:51:25,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:51:25,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:51:25,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:51:25,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:51:25,239 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:51:25,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_range_init.i [2020-12-21 21:51:25,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab91b97a4/3782c2bf7b9545b7930c25f0fc7abfad/FLAGf751fa122 [2020-12-21 21:51:26,014 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:51:26,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i [2020-12-21 21:51:26,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab91b97a4/3782c2bf7b9545b7930c25f0fc7abfad/FLAGf751fa122 [2020-12-21 21:51:26,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab91b97a4/3782c2bf7b9545b7930c25f0fc7abfad [2020-12-21 21:51:26,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:51:26,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:51:26,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:51:26,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:51:26,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:51:26,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dde57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26, skipping insertion in model container [2020-12-21 21:51:26,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:51:26,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:51:26,582 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/array-industry-pattern/array_range_init.i[809,822] [2020-12-21 21:51:26,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:51:26,616 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:51:26,631 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/array-industry-pattern/array_range_init.i[809,822] [2020-12-21 21:51:26,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:51:26,656 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:51:26,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26 WrapperNode [2020-12-21 21:51:26,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:51:26,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:51:26,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:51:26,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:51:26,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:51:26,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:51:26,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:51:26,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:51:26,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (1/1) ... [2020-12-21 21:51:26,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:51:26,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:51:26,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:51:26,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:51:26,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (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 [2020-12-21 21:51:26,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:51:26,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:51:26,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:51:26,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:51:26,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:51:26,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:51:27,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:51:27,220 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:51:27,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:27 BoogieIcfgContainer [2020-12-21 21:51:27,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:51:27,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:51:27,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:51:27,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:51:27,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:51:26" (1/3) ... [2020-12-21 21:51:27,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4278c18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:27, skipping insertion in model container [2020-12-21 21:51:27,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:51:26" (2/3) ... [2020-12-21 21:51:27,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4278c18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:51:27, skipping insertion in model container [2020-12-21 21:51:27,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:51:27" (3/3) ... [2020-12-21 21:51:27,247 INFO L111 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2020-12-21 21:51:27,261 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:51:27,274 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:51:27,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:51:27,411 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:51:27,411 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:51:27,413 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:51:27,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:51:27,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:51:27,414 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:51:27,414 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:51:27,414 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:51:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-21 21:51:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 21:51:27,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:27,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:27,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2020-12-21 21:51:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:27,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819603819] [2020-12-21 21:51:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819603819] [2020-12-21 21:51:27,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:51:27,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:51:27,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079411642] [2020-12-21 21:51:27,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:51:27,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:51:27,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:51:27,722 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-21 21:51:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:27,742 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-21 21:51:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:51:27,744 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-21 21:51:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:27,753 INFO L225 Difference]: With dead ends: 27 [2020-12-21 21:51:27,754 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 21:51:27,757 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 [2020-12-21 21:51:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 21:51:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 21:51:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 21:51:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-21 21:51:27,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-21 21:51:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:27,795 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-21 21:51:27,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:51:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-21 21:51:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 21:51:27,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:27,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:27,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:51:27,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2020-12-21 21:51:27,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:27,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202251529] [2020-12-21 21:51:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:27,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202251529] [2020-12-21 21:51:27,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:51:27,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:51:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665762430] [2020-12-21 21:51:27,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:51:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:51:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:51:27,859 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-21 21:51:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:27,901 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-12-21 21:51:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:51:27,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-21 21:51:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:27,903 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:51:27,903 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 21:51:27,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:51:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 21:51:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-12-21 21:51:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 21:51:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-21 21:51:27,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-12-21 21:51:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:27,909 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-21 21:51:27,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:51:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-21 21:51:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:51:27,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:27,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:27,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:51:27,911 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:27,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1721274617, now seen corresponding path program 1 times [2020-12-21 21:51:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:27,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848301788] [2020-12-21 21:51:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:27,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848301788] [2020-12-21 21:51:27,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794549196] [2020-12-21 21:51:27,964 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 [2020-12-21 21:51:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:51:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:28,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:28,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:51:28,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514925238] [2020-12-21 21:51:28,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:51:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:51:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:51:28,162 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-21 21:51:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:28,208 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-21 21:51:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:51:28,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-21 21:51:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:28,210 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:51:28,210 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 21:51:28,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:51:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 21:51:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-12-21 21:51:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:51:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:51:28,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2020-12-21 21:51:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:28,216 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:51:28,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:51:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:51:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:51:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:28,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:28,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:51:28,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:28,435 INFO L82 PathProgramCache]: Analyzing trace with hash -563082289, now seen corresponding path program 2 times [2020-12-21 21:51:28,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:28,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965149172] [2020-12-21 21:51:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:51:28,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965149172] [2020-12-21 21:51:28,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:51:28,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:51:28,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921029782] [2020-12-21 21:51:28,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:51:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:51:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:51:28,486 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2020-12-21 21:51:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:28,526 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-12-21 21:51:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:51:28,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 21:51:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:28,529 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:51:28,530 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:51:28,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:51:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:51:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2020-12-21 21:51:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:51:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-21 21:51:28,537 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2020-12-21 21:51:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:28,538 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-21 21:51:28,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:51:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-21 21:51:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:51:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:28,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:28,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:51:28,539 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash -847687543, now seen corresponding path program 1 times [2020-12-21 21:51:28,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:28,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432936561] [2020-12-21 21:51:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432936561] [2020-12-21 21:51:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358437787] [2020-12-21 21:51:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:51:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:28,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:28,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:51:28,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534710447] [2020-12-21 21:51:28,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:51:28,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:51:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:51:28,720 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-21 21:51:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:28,796 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-12-21 21:51:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:51:28,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-21 21:51:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:28,798 INFO L225 Difference]: With dead ends: 61 [2020-12-21 21:51:28,798 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:51:28,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:51:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:51:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2020-12-21 21:51:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 21:51:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-21 21:51:28,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2020-12-21 21:51:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:28,808 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-21 21:51:28,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:51:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-21 21:51:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 21:51:28,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:28,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:29,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:29,026 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:29,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1254259593, now seen corresponding path program 2 times [2020-12-21 21:51:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:29,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263538762] [2020-12-21 21:51:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263538762] [2020-12-21 21:51:29,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827609976] [2020-12-21 21:51:29,176 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 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 [2020-12-21 21:51:29,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:51:29,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:51:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:29,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:29,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:51:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115235935] [2020-12-21 21:51:29,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:51:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:51:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:51:29,303 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-12-21 21:51:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:29,408 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-12-21 21:51:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:51:29,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-21 21:51:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:29,411 INFO L225 Difference]: With dead ends: 85 [2020-12-21 21:51:29,411 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:51:29,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:51:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:51:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2020-12-21 21:51:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:51:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 21:51:29,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 22 [2020-12-21 21:51:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:29,421 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 21:51:29,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:51:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 21:51:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:51:29,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:29,422 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:29,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:29,636 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1723898231, now seen corresponding path program 3 times [2020-12-21 21:51:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:29,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818525857] [2020-12-21 21:51:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:29,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818525857] [2020-12-21 21:51:29,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573585560] [2020-12-21 21:51:29,800 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 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 [2020-12-21 21:51:29,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:51:29,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:51:29,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 21:51:29,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:29,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-12-21 21:51:29,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768789955] [2020-12-21 21:51:29,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:51:29,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:51:29,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:51:29,944 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 13 states. [2020-12-21 21:51:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:30,100 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2020-12-21 21:51:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:51:30,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-21 21:51:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:30,102 INFO L225 Difference]: With dead ends: 145 [2020-12-21 21:51:30,102 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:51:30,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:51:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:51:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 43. [2020-12-21 21:51:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 21:51:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-12-21 21:51:30,113 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 28 [2020-12-21 21:51:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:30,113 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-12-21 21:51:30,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:51:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-12-21 21:51:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:51:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:30,115 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:30,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:30,330 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash 388456135, now seen corresponding path program 4 times [2020-12-21 21:51:30,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:30,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862681798] [2020-12-21 21:51:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862681798] [2020-12-21 21:51:30,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879730044] [2020-12-21 21:51:30,552 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 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 [2020-12-21 21:51:30,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:51:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:51:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:30,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:30,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:51:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293298724] [2020-12-21 21:51:30,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:51:30,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:51:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:51:30,718 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-12-21 21:51:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:30,906 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2020-12-21 21:51:30,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:51:30,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-12-21 21:51:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:30,908 INFO L225 Difference]: With dead ends: 179 [2020-12-21 21:51:30,908 INFO L226 Difference]: Without dead ends: 172 [2020-12-21 21:51:30,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:51:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-21 21:51:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 52. [2020-12-21 21:51:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:51:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-12-21 21:51:30,919 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 40 [2020-12-21 21:51:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:30,919 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-12-21 21:51:30,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:51:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-12-21 21:51:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:51:30,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:30,921 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:31,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:31,136 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1486396785, now seen corresponding path program 5 times [2020-12-21 21:51:31,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:31,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119238928] [2020-12-21 21:51:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:31,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119238928] [2020-12-21 21:51:31,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296856093] [2020-12-21 21:51:31,485 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 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 [2020-12-21 21:51:31,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-21 21:51:31,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:51:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:51:32,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:32,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2020-12-21 21:51:32,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642873252] [2020-12-21 21:51:32,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:51:32,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:51:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:51:32,076 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 30 states. [2020-12-21 21:51:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:33,124 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2020-12-21 21:51:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:51:33,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-12-21 21:51:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:33,126 INFO L225 Difference]: With dead ends: 236 [2020-12-21 21:51:33,127 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 21:51:33,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:51:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 21:51:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 64. [2020-12-21 21:51:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:51:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-21 21:51:33,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2020-12-21 21:51:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:33,140 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-21 21:51:33,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:51:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-21 21:51:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:51:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:33,142 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:33,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:33,356 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 349904839, now seen corresponding path program 6 times [2020-12-21 21:51:33,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:33,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621460979] [2020-12-21 21:51:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:33,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621460979] [2020-12-21 21:51:33,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285136527] [2020-12-21 21:51:33,701 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 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 [2020-12-21 21:51:33,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:51:33,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:51:33,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-21 21:51:33,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:33,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2020-12-21 21:51:33,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282303117] [2020-12-21 21:51:33,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:51:33,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:51:33,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:51:33,955 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 24 states. [2020-12-21 21:51:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:34,243 INFO L93 Difference]: Finished difference Result 300 states and 329 transitions. [2020-12-21 21:51:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:51:34,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-12-21 21:51:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:34,246 INFO L225 Difference]: With dead ends: 300 [2020-12-21 21:51:34,246 INFO L226 Difference]: Without dead ends: 293 [2020-12-21 21:51:34,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:51:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-21 21:51:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 157. [2020-12-21 21:51:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 21:51:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2020-12-21 21:51:34,267 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 58 [2020-12-21 21:51:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:34,268 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2020-12-21 21:51:34,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:51:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2020-12-21 21:51:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:51:34,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:34,271 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:34,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:51:34,487 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1751630737, now seen corresponding path program 7 times [2020-12-21 21:51:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:34,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140768491] [2020-12-21 21:51:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:35,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140768491] [2020-12-21 21:51:35,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122775723] [2020-12-21 21:51:35,056 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 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 [2020-12-21 21:51:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:51:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:35,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:35,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:51:35,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531902732] [2020-12-21 21:51:35,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:51:35,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:35,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:51:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:51:35,391 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand 26 states. [2020-12-21 21:51:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:35,687 INFO L93 Difference]: Finished difference Result 386 states and 440 transitions. [2020-12-21 21:51:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:51:35,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-12-21 21:51:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:35,690 INFO L225 Difference]: With dead ends: 386 [2020-12-21 21:51:35,690 INFO L226 Difference]: Without dead ends: 379 [2020-12-21 21:51:35,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:51:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-21 21:51:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 133. [2020-12-21 21:51:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 21:51:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-12-21 21:51:35,707 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 73 [2020-12-21 21:51:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:35,708 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-12-21 21:51:35,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:51:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-12-21 21:51:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:51:35,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:35,710 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 23, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:35,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 21:51:35,924 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1063153041, now seen corresponding path program 8 times [2020-12-21 21:51:35,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:35,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37378355] [2020-12-21 21:51:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37378355] [2020-12-21 21:51:36,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408144394] [2020-12-21 21:51:36,455 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 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 [2020-12-21 21:51:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:51:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:51:36,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:36,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:36,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:51:36,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441175891] [2020-12-21 21:51:36,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:51:36,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:51:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:51:36,737 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 30 states. [2020-12-21 21:51:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:37,084 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2020-12-21 21:51:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:51:37,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-12-21 21:51:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:37,090 INFO L225 Difference]: With dead ends: 386 [2020-12-21 21:51:37,090 INFO L226 Difference]: Without dead ends: 379 [2020-12-21 21:51:37,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:51:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-21 21:51:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 145. [2020-12-21 21:51:37,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 21:51:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2020-12-21 21:51:37,107 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 85 [2020-12-21 21:51:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:37,108 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2020-12-21 21:51:37,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:51:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2020-12-21 21:51:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:51:37,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:37,110 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:37,324 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1470502801, now seen corresponding path program 9 times [2020-12-21 21:51:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:37,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809116950] [2020-12-21 21:51:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:38,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809116950] [2020-12-21 21:51:38,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737730612] [2020-12-21 21:51:38,072 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 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 [2020-12-21 21:51:38,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:51:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:38,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:51:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 293 proven. 15 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-21 21:51:38,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:38,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7] total 38 [2020-12-21 21:51:38,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507881179] [2020-12-21 21:51:38,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:51:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:51:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:51:38,432 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand 38 states. [2020-12-21 21:51:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:39,004 INFO L93 Difference]: Finished difference Result 543 states and 625 transitions. [2020-12-21 21:51:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:51:39,005 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2020-12-21 21:51:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:39,008 INFO L225 Difference]: With dead ends: 543 [2020-12-21 21:51:39,008 INFO L226 Difference]: Without dead ends: 536 [2020-12-21 21:51:39,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:51:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-12-21 21:51:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 199. [2020-12-21 21:51:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-21 21:51:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2020-12-21 21:51:39,028 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 97 [2020-12-21 21:51:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:39,029 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2020-12-21 21:51:39,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:51:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2020-12-21 21:51:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:51:39,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:39,031 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 32, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:39,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:39,245 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1494928817, now seen corresponding path program 10 times [2020-12-21 21:51:39,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:39,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260449587] [2020-12-21 21:51:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:40,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260449587] [2020-12-21 21:51:40,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645073379] [2020-12-21 21:51:40,194 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 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 [2020-12-21 21:51:40,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:51:40,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:51:40,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:40,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:40,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:51:40,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871332419] [2020-12-21 21:51:40,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:51:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:51:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:51:40,521 INFO L87 Difference]: Start difference. First operand 199 states and 239 transitions. Second operand 40 states. [2020-12-21 21:51:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:41,101 INFO L93 Difference]: Finished difference Result 596 states and 692 transitions. [2020-12-21 21:51:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:51:41,102 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2020-12-21 21:51:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:41,105 INFO L225 Difference]: With dead ends: 596 [2020-12-21 21:51:41,106 INFO L226 Difference]: Without dead ends: 589 [2020-12-21 21:51:41,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:51:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-12-21 21:51:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 178. [2020-12-21 21:51:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-21 21:51:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2020-12-21 21:51:41,124 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 115 [2020-12-21 21:51:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:41,125 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2020-12-21 21:51:41,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:51:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2020-12-21 21:51:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-21 21:51:41,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:41,127 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 37, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:41,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:51:41,341 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 266693767, now seen corresponding path program 11 times [2020-12-21 21:51:41,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:41,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292374541] [2020-12-21 21:51:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:42,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292374541] [2020-12-21 21:51:42,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547246194] [2020-12-21 21:51:42,596 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 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 [2020-12-21 21:51:51,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-21 21:51:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:51:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:52,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:52,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:51:52,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837667369] [2020-12-21 21:51:52,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:51:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:51:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:51:52,143 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand 45 states. [2020-12-21 21:51:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:52,945 INFO L93 Difference]: Finished difference Result 569 states and 657 transitions. [2020-12-21 21:51:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:51:52,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2020-12-21 21:51:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:52,948 INFO L225 Difference]: With dead ends: 569 [2020-12-21 21:51:52,948 INFO L226 Difference]: Without dead ends: 562 [2020-12-21 21:51:52,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:51:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-21 21:51:52,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 193. [2020-12-21 21:51:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-21 21:51:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2020-12-21 21:51:52,968 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 130 [2020-12-21 21:51:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:52,970 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2020-12-21 21:51:52,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:51:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2020-12-21 21:51:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-21 21:51:52,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:52,976 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 42, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:53,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:51:53,184 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -351110321, now seen corresponding path program 12 times [2020-12-21 21:51:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:53,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115313009] [2020-12-21 21:51:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115313009] [2020-12-21 21:51:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941858973] [2020-12-21 21:51:54,703 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 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 [2020-12-21 21:51:54,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-21 21:51:54,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:54,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:51:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 583 proven. 26 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-21 21:51:55,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8] total 55 [2020-12-21 21:51:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531165036] [2020-12-21 21:51:55,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 21:51:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 21:51:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:51:55,430 INFO L87 Difference]: Start difference. First operand 193 states and 242 transitions. Second operand 55 states. [2020-12-21 21:51:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:56,672 INFO L93 Difference]: Finished difference Result 789 states and 919 transitions. [2020-12-21 21:51:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-21 21:51:56,672 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 145 [2020-12-21 21:51:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:56,675 INFO L225 Difference]: With dead ends: 789 [2020-12-21 21:51:56,675 INFO L226 Difference]: Without dead ends: 782 [2020-12-21 21:51:56,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:51:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-12-21 21:51:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 250. [2020-12-21 21:51:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-21 21:51:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2020-12-21 21:51:56,695 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 145 [2020-12-21 21:51:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:56,695 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2020-12-21 21:51:56,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 21:51:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2020-12-21 21:51:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 21:51:56,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:56,698 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 48, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:56,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:51:56,907 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1248529911, now seen corresponding path program 13 times [2020-12-21 21:51:56,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031406941] [2020-12-21 21:51:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031406941] [2020-12-21 21:51:58,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770862225] [2020-12-21 21:51:58,903 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 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 [2020-12-21 21:51:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-21 21:51:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:59,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:59,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-21 21:51:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306930936] [2020-12-21 21:51:59,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-21 21:51:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:59,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-21 21:51:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:51:59,252 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand 57 states. [2020-12-21 21:52:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:00,593 INFO L93 Difference]: Finished difference Result 851 states and 998 transitions. [2020-12-21 21:52:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-21 21:52:00,593 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2020-12-21 21:52:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:00,598 INFO L225 Difference]: With dead ends: 851 [2020-12-21 21:52:00,598 INFO L226 Difference]: Without dead ends: 844 [2020-12-21 21:52:00,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:52:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-21 21:52:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 232. [2020-12-21 21:52:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-21 21:52:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 294 transitions. [2020-12-21 21:52:00,618 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 294 transitions. Word has length 166 [2020-12-21 21:52:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:00,619 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 294 transitions. [2020-12-21 21:52:00,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-21 21:52:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 294 transitions. [2020-12-21 21:52:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-21 21:52:00,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:00,621 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 54, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:00,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:00,836 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 506786569, now seen corresponding path program 14 times [2020-12-21 21:52:00,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:00,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471755709] [2020-12-21 21:52:00,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471755709] [2020-12-21 21:52:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31158459] [2020-12-21 21:52:03,267 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 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 [2020-12-21 21:52:03,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:52:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-21 21:52:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:03,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:03,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-21 21:52:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091267770] [2020-12-21 21:52:03,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-21 21:52:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-21 21:52:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-21 21:52:03,687 INFO L87 Difference]: Start difference. First operand 232 states and 294 transitions. Second operand 63 states. [2020-12-21 21:52:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:05,307 INFO L93 Difference]: Finished difference Result 788 states and 913 transitions. [2020-12-21 21:52:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-21 21:52:05,308 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2020-12-21 21:52:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:05,312 INFO L225 Difference]: With dead ends: 788 [2020-12-21 21:52:05,312 INFO L226 Difference]: Without dead ends: 781 [2020-12-21 21:52:05,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-21 21:52:05,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-12-21 21:52:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 250. [2020-12-21 21:52:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-21 21:52:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2020-12-21 21:52:05,332 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 184 [2020-12-21 21:52:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:05,333 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2020-12-21 21:52:05,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-21 21:52:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2020-12-21 21:52:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-21 21:52:05,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:05,336 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 60, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:05,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:52:05,551 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:05,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1228321801, now seen corresponding path program 15 times [2020-12-21 21:52:05,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:05,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495936165] [2020-12-21 21:52:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:08,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495936165] [2020-12-21 21:52:08,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319715987] [2020-12-21 21:52:08,589 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 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 [2020-12-21 21:52:08,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:52:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:08,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:52:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 1014 proven. 40 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2020-12-21 21:52:09,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:09,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 9] total 75 [2020-12-21 21:52:09,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825408166] [2020-12-21 21:52:09,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-21 21:52:09,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:09,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-21 21:52:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 21:52:09,453 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand 75 states. [2020-12-21 21:52:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:12,130 INFO L93 Difference]: Finished difference Result 1080 states and 1267 transitions. [2020-12-21 21:52:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-21 21:52:12,131 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 202 [2020-12-21 21:52:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:12,139 INFO L225 Difference]: With dead ends: 1080 [2020-12-21 21:52:12,139 INFO L226 Difference]: Without dead ends: 1073 [2020-12-21 21:52:12,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-21 21:52:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-12-21 21:52:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 310. [2020-12-21 21:52:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-21 21:52:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 387 transitions. [2020-12-21 21:52:12,166 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 387 transitions. Word has length 202 [2020-12-21 21:52:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:12,167 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 387 transitions. [2020-12-21 21:52:12,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-21 21:52:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 387 transitions. [2020-12-21 21:52:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-21 21:52:12,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:12,170 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 67, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:12,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:12,385 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1611552071, now seen corresponding path program 16 times [2020-12-21 21:52:12,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:12,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469053602] [2020-12-21 21:52:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469053602] [2020-12-21 21:52:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319301714] [2020-12-21 21:52:16,161 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 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 [2020-12-21 21:52:16,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:52:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:52:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-21 21:52:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:52:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:16,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:52:16,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-21 21:52:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394349483] [2020-12-21 21:52:16,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-21 21:52:16,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:52:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-21 21:52:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 21:52:16,627 INFO L87 Difference]: Start difference. First operand 310 states and 387 transitions. Second operand 77 states. [2020-12-21 21:52:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:52:18,884 INFO L93 Difference]: Finished difference Result 1151 states and 1358 transitions. [2020-12-21 21:52:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-21 21:52:18,885 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2020-12-21 21:52:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:52:18,890 INFO L225 Difference]: With dead ends: 1151 [2020-12-21 21:52:18,890 INFO L226 Difference]: Without dead ends: 1144 [2020-12-21 21:52:18,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 21:52:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-12-21 21:52:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 295. [2020-12-21 21:52:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-21 21:52:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2020-12-21 21:52:18,917 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 226 [2020-12-21 21:52:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:52:18,917 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2020-12-21 21:52:18,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-21 21:52:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2020-12-21 21:52:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-21 21:52:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:52:18,921 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 74, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:52:19,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:52:19,136 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:52:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:52:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash -58443505, now seen corresponding path program 17 times [2020-12-21 21:52:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:52:19,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465744906] [2020-12-21 21:52:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:52:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:52:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:52:23,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465744906] [2020-12-21 21:52:23,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291867517] [2020-12-21 21:52:23,396 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 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