/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-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:59,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:59,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:59,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:59,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:59,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:59,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:59,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:59,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:59,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:59,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:59,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:59,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:59,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:59,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:59,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:59,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:59,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:59,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:59,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:59,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:59,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:59,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:59,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:59,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:19:59,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:59,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:59,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:59,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:59,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:59,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:59,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:59,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:59,843 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:59,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:59,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:59,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:59,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:59,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:59,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:59,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:59,846 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:59,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:59,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:59,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:59,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:59,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:59,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:59,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:59,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:59,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:59,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:59,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:59,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:59,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:20:00,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:20:00,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:20:00,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:20:00,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:20:00,279 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:20:00,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2020-12-21 21:20:00,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8f4664c/30bd86733c1a459da0e6018d9eaad7ce/FLAG736896fef [2020-12-21 21:20:01,113 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:20:01,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2020-12-21 21:20:01,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8f4664c/30bd86733c1a459da0e6018d9eaad7ce/FLAG736896fef [2020-12-21 21:20:01,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e8f4664c/30bd86733c1a459da0e6018d9eaad7ce [2020-12-21 21:20:01,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:20:01,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:20:01,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:20:01,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:20:01,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:20:01,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b621dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01, skipping insertion in model container [2020-12-21 21:20:01,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:20:01,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:20:01,701 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-examples/standard_compareModified_ground.i[824,837] [2020-12-21 21:20:01,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:20:01,732 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:20:01,744 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-examples/standard_compareModified_ground.i[824,837] [2020-12-21 21:20:01,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:20:01,772 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:20:01,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01 WrapperNode [2020-12-21 21:20:01,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:20:01,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:20:01,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:20:01,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:20:01,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:20:01,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:20:01,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:20:01,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:20:01,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (1/1) ... [2020-12-21 21:20:01,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:20:01,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:20:01,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:20:01,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:20:01,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (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 21:20:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:20:01,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:20:01,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:20:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:20:02,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:20:02,429 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 21:20:02,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:20:02 BoogieIcfgContainer [2020-12-21 21:20:02,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:20:02,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:20:02,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:20:02,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:20:02,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:20:01" (1/3) ... [2020-12-21 21:20:02,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c64752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:20:02, skipping insertion in model container [2020-12-21 21:20:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:20:01" (2/3) ... [2020-12-21 21:20:02,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c64752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:20:02, skipping insertion in model container [2020-12-21 21:20:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:20:02" (3/3) ... [2020-12-21 21:20:02,442 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2020-12-21 21:20:02,449 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:20:02,455 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:20:02,474 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:20:02,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:20:02,513 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:20:02,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:20:02,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:20:02,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:20:02,514 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:20:02,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:20:02,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:20:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-21 21:20:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:20:02,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1547085679, now seen corresponding path program 1 times [2020-12-21 21:20:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866883285] [2020-12-21 21:20:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,732 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 21:20:02,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866883285] [2020-12-21 21:20:02,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:02,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:20:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762555330] [2020-12-21 21:20:02,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:20:02,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:20:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:20:02,762 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-21 21:20:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,785 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2020-12-21 21:20:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:20:02,787 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:20:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,799 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:20:02,799 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:20:02,803 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 21:20:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:20:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-21 21:20:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:20:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 21:20:02,844 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 9 [2020-12-21 21:20:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,844 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 21:20:02,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:20:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 21:20:02,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:20:02,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:20:02,846 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1862006340, now seen corresponding path program 1 times [2020-12-21 21:20:02,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319290148] [2020-12-21 21:20:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,905 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 21:20:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319290148] [2020-12-21 21:20:02,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:02,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:20:02,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016333408] [2020-12-21 21:20:02,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:20:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:20:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:20:02,909 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2020-12-21 21:20:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,930 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-12-21 21:20:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:20:02,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:20:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,933 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:20:02,933 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 21:20:02,934 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 21:20:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 21:20:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-21 21:20:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:20:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 21:20:02,940 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2020-12-21 21:20:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,940 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 21:20:02,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:20:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 21:20:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:20:02,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:20:02,945 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1719088890, now seen corresponding path program 1 times [2020-12-21 21:20:02,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270591088] [2020-12-21 21:20:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270591088] [2020-12-21 21:20:03,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:20:03,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:20:03,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838689659] [2020-12-21 21:20:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:20:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:20:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:20:03,041 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2020-12-21 21:20:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,080 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-12-21 21:20:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:20:03,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:20:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,082 INFO L225 Difference]: With dead ends: 41 [2020-12-21 21:20:03,083 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:20:03,083 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 21:20:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:20:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-21 21:20:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:20:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 21:20:03,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2020-12-21 21:20:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,089 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 21:20:03,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:20:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 21:20:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:20:03,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:20:03,091 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1486599471, now seen corresponding path program 1 times [2020-12-21 21:20:03,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017981531] [2020-12-21 21:20:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:03,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017981531] [2020-12-21 21:20:03,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322792643] [2020-12-21 21:20:03,145 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 21:20:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:03,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:20:03,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:20:03,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094279723] [2020-12-21 21:20:03,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:20:03,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:20:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:03,285 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2020-12-21 21:20:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,303 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-21 21:20:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:20:03,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:20:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,305 INFO L225 Difference]: With dead ends: 49 [2020-12-21 21:20:03,306 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:20:03,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:20:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-12-21 21:20:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:20:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-21 21:20:03,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 14 [2020-12-21 21:20:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,316 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-21 21:20:03,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:20:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-21 21:20:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:20:03,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,533 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 677252845, now seen corresponding path program 1 times [2020-12-21 21:20:03,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976467205] [2020-12-21 21:20:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976467205] [2020-12-21 21:20:03,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380250756] [2020-12-21 21:20:03,582 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 21:20:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:03,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:20:03,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677877767] [2020-12-21 21:20:03,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:20:03,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:20:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:20:03,719 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2020-12-21 21:20:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,742 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-21 21:20:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:20:03,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:20:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,744 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:20:03,744 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:20:03,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 21:20:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:20:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-21 21:20:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:20:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 21:20:03,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2020-12-21 21:20:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,751 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 21:20:03,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:20:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 21:20:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:20:03,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -156534673, now seen corresponding path program 2 times [2020-12-21 21:20:03,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695835861] [2020-12-21 21:20:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:20:04,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695835861] [2020-12-21 21:20:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850585297] [2020-12-21 21:20:04,024 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 21:20:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:20:04,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:20:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840982883] [2020-12-21 21:20:04,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:20:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:20:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:20:04,144 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2020-12-21 21:20:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,221 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-12-21 21:20:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:20:04,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-21 21:20:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,222 INFO L225 Difference]: With dead ends: 67 [2020-12-21 21:20:04,223 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:20:04,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:20:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:20:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-21 21:20:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:20:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-12-21 21:20:04,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 16 [2020-12-21 21:20:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,230 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-12-21 21:20:04,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:20:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-12-21 21:20:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:20:04,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,446 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2112722198, now seen corresponding path program 3 times [2020-12-21 21:20:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424101110] [2020-12-21 21:20:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:20:04,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424101110] [2020-12-21 21:20:04,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2243286] [2020-12-21 21:20:04,516 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 21:20:04,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:20:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:20:04,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:20:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998318630] [2020-12-21 21:20:04,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:20:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:20:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:20:04,633 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-12-21 21:20:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,706 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-12-21 21:20:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:20:04,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-21 21:20:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,708 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:20:04,708 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:20:04,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:20:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-21 21:20:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:20:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-12-21 21:20:04,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 21 [2020-12-21 21:20:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,716 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-12-21 21:20:04,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:20:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-12-21 21:20:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:20:04,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,932 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash -76506541, now seen corresponding path program 4 times [2020-12-21 21:20:04,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519669430] [2020-12-21 21:20:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:05,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519669430] [2020-12-21 21:20:05,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718764942] [2020-12-21 21:20:05,010 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 21:20:05,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:05,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:05,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:20:05,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516173697] [2020-12-21 21:20:05,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:20:05,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:20:05,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:20:05,125 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 8 states. [2020-12-21 21:20:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,153 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-12-21 21:20:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:20:05,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-21 21:20:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,155 INFO L225 Difference]: With dead ends: 84 [2020-12-21 21:20:05,155 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:20:05,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:20:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:20:05,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-21 21:20:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:20:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-21 21:20:05,161 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 26 [2020-12-21 21:20:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,161 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-21 21:20:05,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:20:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-21 21:20:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:20:05,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,163 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1703817003, now seen corresponding path program 5 times [2020-12-21 21:20:05,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641180222] [2020-12-21 21:20:05,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:20:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641180222] [2020-12-21 21:20:05,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803699811] [2020-12-21 21:20:05,489 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 21:20:05,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:20:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:20:05,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:20:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44716415] [2020-12-21 21:20:05,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:20:05,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:20:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:20:05,885 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 12 states. [2020-12-21 21:20:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,011 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2020-12-21 21:20:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:20:06,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-21 21:20:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,016 INFO L225 Difference]: With dead ends: 96 [2020-12-21 21:20:06,016 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:20:06,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:20:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-12-21 21:20:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:20:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-12-21 21:20:06,031 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2020-12-21 21:20:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,031 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-12-21 21:20:06,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:20:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-12-21 21:20:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:20:06,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,038 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,253 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1657082384, now seen corresponding path program 6 times [2020-12-21 21:20:06,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557078198] [2020-12-21 21:20:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:20:06,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557078198] [2020-12-21 21:20:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072683556] [2020-12-21 21:20:06,354 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 21:20:06,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:20:06,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:20:06,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:20:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064441205] [2020-12-21 21:20:06,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:06,674 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 14 states. [2020-12-21 21:20:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,852 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-12-21 21:20:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:06,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-21 21:20:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,855 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:20:06,855 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:20:06,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:20:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2020-12-21 21:20:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:20:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-21 21:20:06,864 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2020-12-21 21:20:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,864 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-21 21:20:06,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-21 21:20:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:20:06,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,868 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:20:07,070 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1786845127, now seen corresponding path program 7 times [2020-12-21 21:20:07,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850063863] [2020-12-21 21:20:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850063863] [2020-12-21 21:20:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237298691] [2020-12-21 21:20:07,197 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 21:20:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:07,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:20:07,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043709044] [2020-12-21 21:20:07,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:20:07,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:20:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:20:07,343 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 11 states. [2020-12-21 21:20:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,386 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2020-12-21 21:20:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:20:07,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-12-21 21:20:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,387 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:20:07,387 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:20:07,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:20:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:20:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-21 21:20:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:20:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2020-12-21 21:20:07,394 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 38 [2020-12-21 21:20:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,394 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2020-12-21 21:20:07,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:20:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2020-12-21 21:20:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:20:07,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,395 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 21:20:07,611 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2095606715, now seen corresponding path program 8 times [2020-12-21 21:20:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504715626] [2020-12-21 21:20:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:07,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504715626] [2020-12-21 21:20:07,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460964409] [2020-12-21 21:20:07,792 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 21:20:07,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:07,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:20:07,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178910586] [2020-12-21 21:20:07,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:20:07,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:20:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:20:07,937 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand 12 states. [2020-12-21 21:20:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,983 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-12-21 21:20:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:20:07,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-21 21:20:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,984 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:20:07,985 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:20:07,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:20:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:20:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-21 21:20:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:20:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-12-21 21:20:07,991 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 40 [2020-12-21 21:20:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,992 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-12-21 21:20:07,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:20:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-12-21 21:20:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 21:20:07,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,993 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,209 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash 805246653, now seen corresponding path program 9 times [2020-12-21 21:20:08,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747651195] [2020-12-21 21:20:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:20:08,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747651195] [2020-12-21 21:20:08,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177520898] [2020-12-21 21:20:08,416 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 21:20:08,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:20:08,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:20:08,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:20:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400813230] [2020-12-21 21:20:08,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:08,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:08,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:08,798 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 18 states. [2020-12-21 21:20:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,031 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2020-12-21 21:20:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:09,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-21 21:20:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,035 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:20:09,035 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:20:09,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:20:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2020-12-21 21:20:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:20:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-12-21 21:20:09,048 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 42 [2020-12-21 21:20:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,050 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-12-21 21:20:09,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-12-21 21:20:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:20:09,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,051 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,253 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash 502553224, now seen corresponding path program 10 times [2020-12-21 21:20:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372941029] [2020-12-21 21:20:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372941029] [2020-12-21 21:20:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647762051] [2020-12-21 21:20:09,423 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 21:20:09,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:09,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:09,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:09,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096600302] [2020-12-21 21:20:09,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:09,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:09,614 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 14 states. [2020-12-21 21:20:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,666 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-12-21 21:20:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:09,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-21 21:20:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,668 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:20:09,668 INFO L226 Difference]: Without dead ends: 79 [2020-12-21 21:20:09,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-21 21:20:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-21 21:20:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 21:20:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-12-21 21:20:09,674 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2020-12-21 21:20:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,676 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-12-21 21:20:09,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-12-21 21:20:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:20:09,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,677 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:20:09,895 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash 517581126, now seen corresponding path program 11 times [2020-12-21 21:20:09,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098185328] [2020-12-21 21:20:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098185328] [2020-12-21 21:20:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134545585] [2020-12-21 21:20:10,060 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 21:20:15,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:20:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:15,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:20:15,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392207117] [2020-12-21 21:20:15,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:20:15,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:20:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:15,270 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 15 states. [2020-12-21 21:20:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,323 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-12-21 21:20:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:15,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-12-21 21:20:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,325 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:20:15,325 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:20:15,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 21:20:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:20:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-21 21:20:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:20:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-21 21:20:15,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 49 [2020-12-21 21:20:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,331 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-21 21:20:15,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:20:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-21 21:20:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:20:15,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,332 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:15,547 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2074493060, now seen corresponding path program 12 times [2020-12-21 21:20:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399675021] [2020-12-21 21:20:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:20:15,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399675021] [2020-12-21 21:20:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627623337] [2020-12-21 21:20:15,804 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 21:20:20,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:20,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-21 21:20:20,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2020-12-21 21:20:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259981642] [2020-12-21 21:20:20,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:20:20,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:20:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:20,364 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 24 states. [2020-12-21 21:20:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,732 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2020-12-21 21:20:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:20,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-12-21 21:20:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,734 INFO L225 Difference]: With dead ends: 147 [2020-12-21 21:20:20,734 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:20:20,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=861, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:20:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-12-21 21:20:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:20:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-12-21 21:20:20,750 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 51 [2020-12-21 21:20:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,750 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-12-21 21:20:20,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:20:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-12-21 21:20:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:20:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,754 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:20,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:20,955 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash 220186535, now seen corresponding path program 13 times [2020-12-21 21:20:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:20,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68822148] [2020-12-21 21:20:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68822148] [2020-12-21 21:20:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939182877] [2020-12-21 21:20:21,216 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 21:20:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:21,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:21,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:21,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809376925] [2020-12-21 21:20:21,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:21,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:21,405 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 18 states. [2020-12-21 21:20:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:21,484 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2020-12-21 21:20:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:21,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-12-21 21:20:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:21,486 INFO L225 Difference]: With dead ends: 152 [2020-12-21 21:20:21,486 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:20:21,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:20:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-21 21:20:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:20:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-21 21:20:21,491 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 58 [2020-12-21 21:20:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:21,492 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-21 21:20:21,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-21 21:20:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 21:20:21,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:21,493 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:21,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:21,707 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash -782862807, now seen corresponding path program 14 times [2020-12-21 21:20:21,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:21,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290777248] [2020-12-21 21:20:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:21,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290777248] [2020-12-21 21:20:21,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724872856] [2020-12-21 21:20:21,944 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 21:20:22,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:22,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:22,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:20:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78684541] [2020-12-21 21:20:22,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:22,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:22,135 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 19 states. [2020-12-21 21:20:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:22,207 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2020-12-21 21:20:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:22,207 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-12-21 21:20:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:22,208 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:20:22,209 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:20:22,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:20:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-21 21:20:22,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:20:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-12-21 21:20:22,214 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 60 [2020-12-21 21:20:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:22,214 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-12-21 21:20:22,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-12-21 21:20:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:20:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:22,215 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:22,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:20:22,430 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1654361131, now seen corresponding path program 15 times [2020-12-21 21:20:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:22,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531399481] [2020-12-21 21:20:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:20:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531399481] [2020-12-21 21:20:22,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063452165] [2020-12-21 21:20:22,665 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 21:20:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:20:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:23,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-21 21:20:23,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:23,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-12-21 21:20:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753888122] [2020-12-21 21:20:23,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:23,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:23,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:23,572 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 27 states. [2020-12-21 21:20:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:23,979 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2020-12-21 21:20:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:20:23,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-12-21 21:20:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:23,980 INFO L225 Difference]: With dead ends: 166 [2020-12-21 21:20:23,980 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:20:23,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1218, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:20:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:20:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2020-12-21 21:20:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 21:20:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2020-12-21 21:20:23,986 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 62 [2020-12-21 21:20:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:23,987 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2020-12-21 21:20:23,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2020-12-21 21:20:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:20:23,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:23,988 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:24,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:24,202 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash 810957658, now seen corresponding path program 16 times [2020-12-21 21:20:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:24,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892877839] [2020-12-21 21:20:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892877839] [2020-12-21 21:20:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376999376] [2020-12-21 21:20:24,479 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 21:20:24,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:24,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:24,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:24,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:24,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943100643] [2020-12-21 21:20:24,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:24,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:24,736 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand 21 states. [2020-12-21 21:20:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:24,809 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-12-21 21:20:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:24,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-12-21 21:20:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:24,811 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:20:24,811 INFO L226 Difference]: Without dead ends: 105 [2020-12-21 21:20:24,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:24,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-21 21:20:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-21 21:20:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:20:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-12-21 21:20:24,815 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 67 [2020-12-21 21:20:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:24,816 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-12-21 21:20:24,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-12-21 21:20:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:20:24,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:24,817 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:25,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:25,031 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1055998184, now seen corresponding path program 17 times [2020-12-21 21:20:25,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:25,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273740290] [2020-12-21 21:20:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:20:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273740290] [2020-12-21 21:20:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77173766] [2020-12-21 21:20:25,304 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