/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/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:27:21,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:27:21,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:27:21,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:27:21,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:27:21,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:27:21,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:27:21,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:27:21,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:27:21,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:27:21,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:27:21,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 04:27:21,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:27:21,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:27:21,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:27:21,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:27:21,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:27:21,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:27:21,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:27:21,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:27:21,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:27:21,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:27:21,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:27:21,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:27:21,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:27:21,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:27:21,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:27:21,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:27:21,702 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:27:21,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:27:21,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:27:21,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:27:21,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:27:21,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:27:21,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:27:21,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:27:21,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:27:21,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:27:21,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:27:21,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:27:21,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:27:21,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:27:21,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:27:21,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:27:21,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:27:21,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:27:21,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:27:21,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:27:21,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:27:21,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:27:22,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:27:22,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:27:22,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:27:22,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:27:22,118 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:27:22,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2020-12-22 04:27:22,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdbff2ca/e9516809341b4a30ad062b53dcf6627f/FLAG78b2d452d [2020-12-22 04:27:22,837 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:27:22,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2020-12-22 04:27:22,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdbff2ca/e9516809341b4a30ad062b53dcf6627f/FLAG78b2d452d [2020-12-22 04:27:23,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdbff2ca/e9516809341b4a30ad062b53dcf6627f [2020-12-22 04:27:23,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:27:23,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:27:23,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:27:23,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:27:23,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:27:23,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1613a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23, skipping insertion in model container [2020-12-22 04:27:23,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:27:23,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:27:23,387 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2020-12-22 04:27:23,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:27:23,418 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:27:23,436 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2020-12-22 04:27:23,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:27:23,478 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:27:23,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23 WrapperNode [2020-12-22 04:27:23,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:27:23,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:27:23,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:27:23,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:27:23,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:27:23,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:27:23,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:27:23,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:27:23,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... [2020-12-22 04:27:23,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:27:23,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:27:23,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:27:23,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:27:23,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:27:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:27:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:27:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:27:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:27:24,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:27:24,020 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 04:27:24,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:27:24 BoogieIcfgContainer [2020-12-22 04:27:24,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:27:24,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:27:24,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:27:24,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:27:24,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:27:23" (1/3) ... [2020-12-22 04:27:24,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ed987d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:27:24, skipping insertion in model container [2020-12-22 04:27:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:27:23" (2/3) ... [2020-12-22 04:27:24,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ed987d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:27:24, skipping insertion in model container [2020-12-22 04:27:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:27:24" (3/3) ... [2020-12-22 04:27:24,030 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2020-12-22 04:27:24,040 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:27:24,048 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 04:27:24,070 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 04:27:24,097 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:27:24,097 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:27:24,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:27:24,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:27:24,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:27:24,098 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:27:24,098 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:27:24,098 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:27:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 04:27:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:27:24,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:24,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:24,122 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash 212117245, now seen corresponding path program 1 times [2020-12-22 04:27:24,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:24,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099390577] [2020-12-22 04:27:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:24,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099390577] [2020-12-22 04:27:24,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:27:24,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:27:24,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045027908] [2020-12-22 04:27:24,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:27:24,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:27:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:27:24,547 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-22 04:27:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:24,648 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2020-12-22 04:27:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:27:24,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:27:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:24,674 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:27:24,675 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:27:24,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:27:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:27:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-22 04:27:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:27:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 04:27:24,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-12-22 04:27:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:24,763 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 04:27:24,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:27:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 04:27:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:27:24,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:24,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:24,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:27:24,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1436002194, now seen corresponding path program 1 times [2020-12-22 04:27:24,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:24,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752370583] [2020-12-22 04:27:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752370583] [2020-12-22 04:27:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389543107] [2020-12-22 04:27:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:27:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:24,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:24,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:27:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891189777] [2020-12-22 04:27:24,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:27:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:27:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:27:24,974 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-12-22 04:27:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:25,029 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-12-22 04:27:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:27:25,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 04:27:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:25,030 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:27:25,031 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:27:25,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:27:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:27:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-12-22 04:27:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:27:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-22 04:27:25,039 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2020-12-22 04:27:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:25,039 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-22 04:27:25,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:27:25,039 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-22 04:27:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:27:25,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:25,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:25,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:27:25,254 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash 780804628, now seen corresponding path program 2 times [2020-12-22 04:27:25,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:25,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606465177] [2020-12-22 04:27:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606465177] [2020-12-22 04:27:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269250654] [2020-12-22 04:27:25,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:25,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:25,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:25,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:27:25,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:25,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:25,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:27:25,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174593217] [2020-12-22 04:27:25,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:27:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:27:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:25,462 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-12-22 04:27:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:25,534 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-22 04:27:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:27:25,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 04:27:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:25,536 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:27:25,536 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:27:25,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:27:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-12-22 04:27:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:27:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-22 04:27:25,545 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2020-12-22 04:27:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:25,545 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-22 04:27:25,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:27:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-22 04:27:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:27:25,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:25,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:25,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:25,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1798831082, now seen corresponding path program 3 times [2020-12-22 04:27:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:25,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563993637] [2020-12-22 04:27:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563993637] [2020-12-22 04:27:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577686169] [2020-12-22 04:27:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:25,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:27:25,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:25,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:27:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:25,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:25,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:27:25,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67320045] [2020-12-22 04:27:25,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:27:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:27:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:25,976 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-12-22 04:27:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:26,073 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-12-22 04:27:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:27:26,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:27:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:26,075 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:27:26,075 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:27:26,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:27:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-12-22 04:27:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:27:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-22 04:27:26,084 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 14 [2020-12-22 04:27:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:26,085 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-22 04:27:26,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:27:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-22 04:27:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:27:26,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:26,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:26,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:26,302 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1662348696, now seen corresponding path program 4 times [2020-12-22 04:27:26,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:26,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527922311] [2020-12-22 04:27:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527922311] [2020-12-22 04:27:26,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008864091] [2020-12-22 04:27:26,429 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:26,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:27:26,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:26,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:26,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:27:26,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029985639] [2020-12-22 04:27:26,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:27:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:27:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:26,544 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-12-22 04:27:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:26,684 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-22 04:27:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:27:26,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 04:27:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:26,686 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:27:26,686 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:27:26,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:27:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-12-22 04:27:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:27:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-12-22 04:27:26,694 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 16 [2020-12-22 04:27:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:26,695 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-12-22 04:27:26,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:27:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-12-22 04:27:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:27:26,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:26,696 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:26,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:26,911 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:26,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:26,912 INFO L82 PathProgramCache]: Analyzing trace with hash -743539046, now seen corresponding path program 5 times [2020-12-22 04:27:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:26,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714819182] [2020-12-22 04:27:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714819182] [2020-12-22 04:27:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412050847] [2020-12-22 04:27:27,087 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:27,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:27:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:27:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:27,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:27,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:27:27,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712786003] [2020-12-22 04:27:27,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:27:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:27,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:27:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:27,238 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-12-22 04:27:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:27,403 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-12-22 04:27:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:27:27,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-22 04:27:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:27,411 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:27:27,411 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:27:27,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:27:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-12-22 04:27:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:27:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-22 04:27:27,428 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 18 [2020-12-22 04:27:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:27,428 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-22 04:27:27,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:27:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-22 04:27:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:27:27,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:27,430 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:27,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:27:27,646 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2109253860, now seen corresponding path program 6 times [2020-12-22 04:27:27,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:27,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555516732] [2020-12-22 04:27:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555516732] [2020-12-22 04:27:27,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739934469] [2020-12-22 04:27:27,785 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:27,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:27:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:27:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:27:28,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051210812] [2020-12-22 04:27:28,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:27:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:27:28,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:28,057 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 10 states. [2020-12-22 04:27:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:28,301 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-12-22 04:27:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:27:28,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 04:27:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:28,303 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:27:28,303 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:27:28,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:27:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2020-12-22 04:27:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:27:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-22 04:27:28,311 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 20 [2020-12-22 04:27:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:28,311 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-22 04:27:28,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:27:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-22 04:27:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:27:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:28,312 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:28,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:28,518 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:28,520 INFO L82 PathProgramCache]: Analyzing trace with hash -301197538, now seen corresponding path program 7 times [2020-12-22 04:27:28,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:28,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479132792] [2020-12-22 04:27:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479132792] [2020-12-22 04:27:28,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608336690] [2020-12-22 04:27:28,678 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:28,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:27:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:27:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200434508] [2020-12-22 04:27:28,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:27:28,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:28,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:27:28,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:28,818 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 11 states. [2020-12-22 04:27:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:29,090 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2020-12-22 04:27:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:27:29,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-12-22 04:27:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:29,092 INFO L225 Difference]: With dead ends: 132 [2020-12-22 04:27:29,092 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:27:29,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:27:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-12-22 04:27:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:27:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-12-22 04:27:29,100 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 22 [2020-12-22 04:27:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:29,100 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-12-22 04:27:29,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:27:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-12-22 04:27:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:27:29,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:29,101 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:29,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:29,303 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2074140320, now seen corresponding path program 8 times [2020-12-22 04:27:29,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:29,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269081655] [2020-12-22 04:27:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:29,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269081655] [2020-12-22 04:27:29,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955749497] [2020-12-22 04:27:29,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:29,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:29,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:29,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:27:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:29,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:29,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:27:29,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653083355] [2020-12-22 04:27:29,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:27:29,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:29,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:27:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:29,603 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 12 states. [2020-12-22 04:27:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:29,930 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-12-22 04:27:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:27:29,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-22 04:27:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:29,933 INFO L225 Difference]: With dead ends: 146 [2020-12-22 04:27:29,933 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:27:29,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:27:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-12-22 04:27:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:27:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-12-22 04:27:29,942 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 24 [2020-12-22 04:27:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:29,942 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-12-22 04:27:29,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:27:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-12-22 04:27:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:27:29,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:29,943 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:30,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:27:30,158 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:30,159 INFO L82 PathProgramCache]: Analyzing trace with hash -148779614, now seen corresponding path program 9 times [2020-12-22 04:27:30,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:30,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017654904] [2020-12-22 04:27:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017654904] [2020-12-22 04:27:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581003816] [2020-12-22 04:27:30,326 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:31,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:27:31,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:27:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:31,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:31,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:27:31,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656523501] [2020-12-22 04:27:31,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:27:31,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:27:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:31,078 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 13 states. [2020-12-22 04:27:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:31,461 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2020-12-22 04:27:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:27:31,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-22 04:27:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:31,467 INFO L225 Difference]: With dead ends: 160 [2020-12-22 04:27:31,467 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:27:31,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:27:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2020-12-22 04:27:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:27:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-12-22 04:27:31,487 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 26 [2020-12-22 04:27:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:31,488 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-12-22 04:27:31,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:27:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-12-22 04:27:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:27:31,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:31,493 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:31,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:31,695 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1776090076, now seen corresponding path program 10 times [2020-12-22 04:27:31,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:31,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878713678] [2020-12-22 04:27:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878713678] [2020-12-22 04:27:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880157146] [2020-12-22 04:27:31,925 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:31,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:27:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:32,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:32,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:27:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200800686] [2020-12-22 04:27:32,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:27:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:27:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:32,158 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2020-12-22 04:27:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:32,607 INFO L93 Difference]: Finished difference Result 174 states and 188 transitions. [2020-12-22 04:27:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:27:32,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-22 04:27:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:32,609 INFO L225 Difference]: With dead ends: 174 [2020-12-22 04:27:32,609 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 04:27:32,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 04:27:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2020-12-22 04:27:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:27:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-12-22 04:27:32,633 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 28 [2020-12-22 04:27:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:32,634 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-12-22 04:27:32,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:27:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-12-22 04:27:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:27:32,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:32,638 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:32,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:32,854 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2041618982, now seen corresponding path program 11 times [2020-12-22 04:27:32,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:32,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929506004] [2020-12-22 04:27:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:33,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929506004] [2020-12-22 04:27:33,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317325659] [2020-12-22 04:27:33,101 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:35,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:27:35,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:27:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:36,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:27:36,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152747483] [2020-12-22 04:27:36,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:27:36,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:27:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:36,041 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 15 states. [2020-12-22 04:27:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:36,588 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2020-12-22 04:27:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:27:36,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-22 04:27:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:36,589 INFO L225 Difference]: With dead ends: 188 [2020-12-22 04:27:36,589 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 04:27:36,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 04:27:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-12-22 04:27:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:27:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-12-22 04:27:36,600 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 30 [2020-12-22 04:27:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:36,600 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-12-22 04:27:36,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:27:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-12-22 04:27:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:27:36,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:36,601 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:36,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:27:36,809 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1337014360, now seen corresponding path program 12 times [2020-12-22 04:27:36,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:36,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923245705] [2020-12-22 04:27:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923245705] [2020-12-22 04:27:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537641270] [2020-12-22 04:27:37,070 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:41,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:27:41,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:41,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:27:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:41,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:41,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:27:41,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369709737] [2020-12-22 04:27:41,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:27:41,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:27:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:41,357 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 16 states. [2020-12-22 04:27:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:42,025 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2020-12-22 04:27:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:27:42,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-12-22 04:27:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:42,027 INFO L225 Difference]: With dead ends: 202 [2020-12-22 04:27:42,027 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 04:27:42,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 04:27:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-12-22 04:27:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:27:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2020-12-22 04:27:42,034 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 32 [2020-12-22 04:27:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:42,034 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2020-12-22 04:27:42,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:27:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2020-12-22 04:27:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:27:42,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:42,035 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:42,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:27:42,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1208380246, now seen corresponding path program 13 times [2020-12-22 04:27:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:42,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560558313] [2020-12-22 04:27:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560558313] [2020-12-22 04:27:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462428902] [2020-12-22 04:27:42,516 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:27:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:42,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:42,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:27:42,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988565602] [2020-12-22 04:27:42,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:27:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:27:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:42,736 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 17 states. [2020-12-22 04:27:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:43,432 INFO L93 Difference]: Finished difference Result 216 states and 233 transitions. [2020-12-22 04:27:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:27:43,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-12-22 04:27:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:43,434 INFO L225 Difference]: With dead ends: 216 [2020-12-22 04:27:43,434 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 04:27:43,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 04:27:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-12-22 04:27:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:27:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2020-12-22 04:27:43,441 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 34 [2020-12-22 04:27:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:43,441 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2020-12-22 04:27:43,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:27:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2020-12-22 04:27:43,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:27:43,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:43,442 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:43,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:27:43,656 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2145048276, now seen corresponding path program 14 times [2020-12-22 04:27:43,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:43,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365803712] [2020-12-22 04:27:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365803712] [2020-12-22 04:27:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642677713] [2020-12-22 04:27:43,939 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:43,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:43,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:27:43,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:44,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:44,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:27:44,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374587537] [2020-12-22 04:27:44,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:27:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:27:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:44,205 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 18 states. [2020-12-22 04:27:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:45,073 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-12-22 04:27:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:27:45,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-12-22 04:27:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:45,075 INFO L225 Difference]: With dead ends: 230 [2020-12-22 04:27:45,076 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:27:45,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:27:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2020-12-22 04:27:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 04:27:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-12-22 04:27:45,083 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 36 [2020-12-22 04:27:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:45,083 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-12-22 04:27:45,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:27:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-12-22 04:27:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:27:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:45,084 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:45,298 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -339892946, now seen corresponding path program 15 times [2020-12-22 04:27:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:45,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400102744] [2020-12-22 04:27:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:45,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400102744] [2020-12-22 04:27:45,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942663383] [2020-12-22 04:27:45,674 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:50,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:27:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:50,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:27:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:50,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:50,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:27:50,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578844446] [2020-12-22 04:27:50,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:27:50,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:27:50,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:50,527 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 19 states. [2020-12-22 04:27:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:51,449 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-12-22 04:27:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:27:51,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-22 04:27:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:51,452 INFO L225 Difference]: With dead ends: 244 [2020-12-22 04:27:51,452 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 04:27:51,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 04:27:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2020-12-22 04:27:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 04:27:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-12-22 04:27:51,459 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 38 [2020-12-22 04:27:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:51,459 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-12-22 04:27:51,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:27:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-12-22 04:27:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:27:51,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:51,460 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:51,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:27:51,665 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -752408400, now seen corresponding path program 16 times [2020-12-22 04:27:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:51,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725122226] [2020-12-22 04:27:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:52,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725122226] [2020-12-22 04:27:52,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112743923] [2020-12-22 04:27:52,009 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:52,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:52,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:27:52,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:52,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:52,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:27:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328970892] [2020-12-22 04:27:52,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:27:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:27:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:52,378 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 20 states. [2020-12-22 04:27:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:53,512 INFO L93 Difference]: Finished difference Result 258 states and 278 transitions. [2020-12-22 04:27:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:27:53,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-22 04:27:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:53,514 INFO L225 Difference]: With dead ends: 258 [2020-12-22 04:27:53,514 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 04:27:53,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 04:27:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-12-22 04:27:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 04:27:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-12-22 04:27:53,522 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 40 [2020-12-22 04:27:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:53,523 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-12-22 04:27:53,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:27:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-12-22 04:27:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:27:53,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:53,524 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:53,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:27:53,738 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2042768462, now seen corresponding path program 17 times [2020-12-22 04:27:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:53,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258649153] [2020-12-22 04:27:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:54,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258649153] [2020-12-22 04:27:54,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087563394] [2020-12-22 04:27:54,132 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:21,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:28:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:28:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:21,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:28:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593559423] [2020-12-22 04:28:21,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:28:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:28:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:28:21,844 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 21 states. [2020-12-22 04:28:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:23,056 INFO L93 Difference]: Finished difference Result 272 states and 293 transitions. [2020-12-22 04:28:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:28:23,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-12-22 04:28:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:23,058 INFO L225 Difference]: With dead ends: 272 [2020-12-22 04:28:23,058 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 04:28:23,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:28:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 04:28:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 138. [2020-12-22 04:28:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-22 04:28:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2020-12-22 04:28:23,066 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 42 [2020-12-22 04:28:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:23,067 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2020-12-22 04:28:23,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:28:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2020-12-22 04:28:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:28:23,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:23,069 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:23,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:28:23,277 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash -833239500, now seen corresponding path program 18 times [2020-12-22 04:28:23,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:23,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188637301] [2020-12-22 04:28:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:23,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188637301] [2020-12-22 04:28:23,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330032299] [2020-12-22 04:28:23,713 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:17,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:29:17,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:29:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:17,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:17,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:29:17,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084600530] [2020-12-22 04:29:17,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:29:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:29:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:29:17,960 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand 22 states. [2020-12-22 04:29:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:19,323 INFO L93 Difference]: Finished difference Result 286 states and 308 transitions. [2020-12-22 04:29:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:29:19,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-12-22 04:29:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:19,325 INFO L225 Difference]: With dead ends: 286 [2020-12-22 04:29:19,325 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 04:29:19,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:29:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 04:29:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-12-22 04:29:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-22 04:29:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2020-12-22 04:29:19,332 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 44 [2020-12-22 04:29:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:19,333 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2020-12-22 04:29:19,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:29:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2020-12-22 04:29:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:29:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:19,333 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:19,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:19,544 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1882923062, now seen corresponding path program 19 times [2020-12-22 04:29:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:19,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311290354] [2020-12-22 04:29:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:19,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311290354] [2020-12-22 04:29:19,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908120694] [2020-12-22 04:29:19,976 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:29:20,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:20,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:20,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:29:20,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491077902] [2020-12-22 04:29:20,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:29:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:20,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:29:20,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:29:20,281 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 23 states. [2020-12-22 04:29:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:21,736 INFO L93 Difference]: Finished difference Result 300 states and 323 transitions. [2020-12-22 04:29:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:29:21,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-12-22 04:29:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:21,737 INFO L225 Difference]: With dead ends: 300 [2020-12-22 04:29:21,737 INFO L226 Difference]: Without dead ends: 196 [2020-12-22 04:29:21,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:29:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-22 04:29:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2020-12-22 04:29:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 04:29:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2020-12-22 04:29:21,745 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 46 [2020-12-22 04:29:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:21,745 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2020-12-22 04:29:21,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:29:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2020-12-22 04:29:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:29:21,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:21,746 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:21,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:21,960 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash 775029176, now seen corresponding path program 20 times [2020-12-22 04:29:21,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:21,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630963416] [2020-12-22 04:29:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:22,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630963416] [2020-12-22 04:29:22,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853442630] [2020-12-22 04:29:22,476 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:29:22,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:29:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:22,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:22,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:29:22,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262778829] [2020-12-22 04:29:22,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:29:22,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:29:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:29:22,816 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand 24 states. [2020-12-22 04:29:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:24,528 INFO L93 Difference]: Finished difference Result 314 states and 338 transitions. [2020-12-22 04:29:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:29:24,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-12-22 04:29:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:24,530 INFO L225 Difference]: With dead ends: 314 [2020-12-22 04:29:24,531 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 04:29:24,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:29:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 04:29:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-12-22 04:29:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 04:29:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2020-12-22 04:29:24,538 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 48 [2020-12-22 04:29:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:24,538 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2020-12-22 04:29:24,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:29:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2020-12-22 04:29:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:29:24,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:24,539 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:24,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:29:24,740 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1240894138, now seen corresponding path program 21 times [2020-12-22 04:29:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:24,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509686777] [2020-12-22 04:29:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:25,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509686777] [2020-12-22 04:29:25,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968019690] [2020-12-22 04:29:25,197 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:42,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:30:42,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:42,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:30:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:43,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:43,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:30:43,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987850416] [2020-12-22 04:30:43,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:30:43,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:30:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:30:43,159 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand 25 states. [2020-12-22 04:30:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:44,946 INFO L93 Difference]: Finished difference Result 328 states and 353 transitions. [2020-12-22 04:30:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:30:44,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-12-22 04:30:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:44,950 INFO L225 Difference]: With dead ends: 328 [2020-12-22 04:30:44,950 INFO L226 Difference]: Without dead ends: 214 [2020-12-22 04:30:44,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:30:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-22 04:30:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 166. [2020-12-22 04:30:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 04:30:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 189 transitions. [2020-12-22 04:30:44,961 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 189 transitions. Word has length 50 [2020-12-22 04:30:44,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:44,962 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 189 transitions. [2020-12-22 04:30:44,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:30:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 189 transitions. [2020-12-22 04:30:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:30:44,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:44,963 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:45,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:30:45,170 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2034443460, now seen corresponding path program 22 times [2020-12-22 04:30:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:45,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933909564] [2020-12-22 04:30:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:45,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933909564] [2020-12-22 04:30:45,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756177141] [2020-12-22 04:30:45,769 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:45,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:30:45,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 04:30:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:46,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:46,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:30:46,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107955029] [2020-12-22 04:30:46,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:30:46,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:46,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:30:46,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:30:46,353 INFO L87 Difference]: Start difference. First operand 166 states and 189 transitions. Second operand 26 states. [2020-12-22 04:30:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:48,289 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-12-22 04:30:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:30:48,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-12-22 04:30:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:48,291 INFO L225 Difference]: With dead ends: 342 [2020-12-22 04:30:48,291 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 04:30:48,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 22 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:30:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 04:30:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2020-12-22 04:30:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 04:30:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2020-12-22 04:30:48,298 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 52 [2020-12-22 04:30:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:48,299 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2020-12-22 04:30:48,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:30:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2020-12-22 04:30:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:30:48,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:48,299 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:48,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:48,513 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1422847170, now seen corresponding path program 23 times [2020-12-22 04:30:48,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:48,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922528993] [2020-12-22 04:30:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922528993] [2020-12-22 04:30:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792848687] [2020-12-22 04:30:49,052 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true