/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:10:21,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:10:21,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:10:22,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:10:22,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:10:22,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:10:22,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:10:22,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:10:22,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:10:22,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:10:22,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:10:22,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:10:22,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:10:22,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:10:22,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:10:22,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:10:22,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:10:22,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:10:22,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:10:22,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:10:22,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:10:22,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:10:22,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:10:22,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:10:22,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:10:22,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:10:22,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:10:22,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:10:22,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:10:22,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:10:22,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:10:22,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:10:22,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2020-12-21 22:10:22,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:10:22,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:10:22,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:10:22,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:10:22,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:10:22,102 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:10:22,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:10:22,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:10:22,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:10:22,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:10:22,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:10:22,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:10:22,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:10:22,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:10:22,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:10:22,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:10:22,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:10:22,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:10:22,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:10:22,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:10:22,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:10:22,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:10:22,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:10:22,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:10:22,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:10:22,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:10:22,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:10:22,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:10:22,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:10:22,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:10:22,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:10:22,526 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:10:22,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/copysome2-2.i [2020-12-21 22:10:22,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94085b32f/921ed8a7c08348bb9c954fb6ab2b5c6c/FLAG753a191f2 [2020-12-21 22:10:23,226 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:10:23,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-2.i [2020-12-21 22:10:23,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94085b32f/921ed8a7c08348bb9c954fb6ab2b5c6c/FLAG753a191f2 [2020-12-21 22:10:23,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94085b32f/921ed8a7c08348bb9c954fb6ab2b5c6c [2020-12-21 22:10:23,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:10:23,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:10:23,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:23,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:10:23,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:10:23,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d84841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23, skipping insertion in model container [2020-12-21 22:10:23,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:10:23,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:10:23,780 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2020-12-21 22:10:23,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:23,810 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:10:23,826 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2020-12-21 22:10:23,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:10:23,858 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:10:23,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23 WrapperNode [2020-12-21 22:10:23,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:10:23,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:23,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:10:23,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:10:23,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:10:23,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:10:23,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:10:23,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:10:23,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (1/1) ... [2020-12-21 22:10:23,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:10:23,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:10:23,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:10:23,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:10:23,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (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 [2020-12-21 22:10:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:10:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:10:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:10:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:10:24,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:10:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:10:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:10:24,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:10:24,693 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:10:24,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:24 BoogieIcfgContainer [2020-12-21 22:10:24,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:10:24,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:10:24,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:10:24,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:10:24,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:23" (1/3) ... [2020-12-21 22:10:24,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117668cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:24, skipping insertion in model container [2020-12-21 22:10:24,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:23" (2/3) ... [2020-12-21 22:10:24,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117668cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:24, skipping insertion in model container [2020-12-21 22:10:24,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:24" (3/3) ... [2020-12-21 22:10:24,707 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2020-12-21 22:10:24,716 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:10:24,722 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:10:24,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:10:24,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:10:24,789 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:10:24,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:10:24,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:10:24,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:10:24,790 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:10:24,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:10:24,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:10:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-21 22:10:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:10:24,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:24,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:24,820 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:24,827 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2020-12-21 22:10:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730393573] [2020-12-21 22:10:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:25,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730393573] [2020-12-21 22:10:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:25,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:10:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735386245] [2020-12-21 22:10:25,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:10:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:10:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:25,084 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-21 22:10:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:25,104 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-21 22:10:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:10:25,106 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:10:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:25,116 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:10:25,116 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 22:10:25,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:10:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 22:10:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-21 22:10:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:10:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 22:10:25,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2020-12-21 22:10:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 22:10:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:10:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 22:10:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:10:25,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:25,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:25,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:10:25,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2020-12-21 22:10:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:25,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045324458] [2020-12-21 22:10:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:10:25,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045324458] [2020-12-21 22:10:25,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:25,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:10:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119074464] [2020-12-21 22:10:25,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:10:25,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:10:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:10:25,219 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 22:10:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:25,305 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-12-21 22:10:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:10:25,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:10:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:25,307 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:10:25,307 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:10:25,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:10:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:10:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-21 22:10:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:10:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 22:10:25,315 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2020-12-21 22:10:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:25,315 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 22:10:25,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:10:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 22:10:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:10:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:25,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:25,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:10:25,317 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2020-12-21 22:10:25,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:25,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843047323] [2020-12-21 22:10:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:10:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843047323] [2020-12-21 22:10:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230051540] [2020-12-21 22:10:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:10:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:10:25,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:25,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 22:10:25,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141200380] [2020-12-21 22:10:25,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:10:25,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:25,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:10:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:10:25,603 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2020-12-21 22:10:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:25,742 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-21 22:10:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:25,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-21 22:10:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:25,744 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:10:25,745 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:10:25,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:10:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:10:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-21 22:10:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:10:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-21 22:10:25,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-21 22:10:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:25,752 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-21 22:10:25,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:10:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-21 22:10:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:10:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:25,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:25,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:10:25,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash -890123177, now seen corresponding path program 2 times [2020-12-21 22:10:25,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:25,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585070303] [2020-12-21 22:10:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 22:10:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585070303] [2020-12-21 22:10:26,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:10:26,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:10:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169665211] [2020-12-21 22:10:26,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:26,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:26,097 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-21 22:10:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:26,185 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-21 22:10:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:26,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-21 22:10:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:26,187 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:10:26,188 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:10:26,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:10:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:10:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-21 22:10:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:10:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-21 22:10:26,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 27 [2020-12-21 22:10:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:26,196 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-21 22:10:26,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-21 22:10:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:10:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:26,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:26,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 22:10:26,198 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -497096167, now seen corresponding path program 1 times [2020-12-21 22:10:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:26,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709130534] [2020-12-21 22:10:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:10:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709130534] [2020-12-21 22:10:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193121214] [2020-12-21 22:10:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:10:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 22:10:26,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:26,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:10:26,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303654950] [2020-12-21 22:10:26,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:10:26,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:10:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:10:26,700 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-12-21 22:10:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:26,951 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-12-21 22:10:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:26,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-21 22:10:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:26,956 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:10:26,956 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:10:26,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:10:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-21 22:10:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:10:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-21 22:10:26,985 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2020-12-21 22:10:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:26,985 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-21 22:10:26,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:10:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-21 22:10:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:10:26,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:26,991 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:27,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:27,195 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:27,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1104364036, now seen corresponding path program 1 times [2020-12-21 22:10:27,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:27,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236775333] [2020-12-21 22:10:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 22:10:27,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236775333] [2020-12-21 22:10:27,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022496303] [2020-12-21 22:10:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:27,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 22:10:27,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:27,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 22:10:27,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514551658] [2020-12-21 22:10:27,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:10:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:10:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:27,598 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-12-21 22:10:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:27,780 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-12-21 22:10:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:10:27,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 22:10:27,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:27,782 INFO L225 Difference]: With dead ends: 82 [2020-12-21 22:10:27,782 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:10:27,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:10:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:10:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2020-12-21 22:10:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:10:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-21 22:10:27,789 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 35 [2020-12-21 22:10:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:27,790 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-21 22:10:27,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:10:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-21 22:10:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 22:10:27,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:27,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:28,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:28,007 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash 989483061, now seen corresponding path program 2 times [2020-12-21 22:10:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:28,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114664748] [2020-12-21 22:10:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 22:10:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114664748] [2020-12-21 22:10:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933101884] [2020-12-21 22:10:28,096 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:28,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:10:28,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:10:28,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-21 22:10:28,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:28,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-12-21 22:10:28,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591540920] [2020-12-21 22:10:28,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:10:28,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:10:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:10:28,381 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-12-21 22:10:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:28,664 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2020-12-21 22:10:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:10:28,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-12-21 22:10:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:28,667 INFO L225 Difference]: With dead ends: 110 [2020-12-21 22:10:28,667 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:10:28,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:10:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:10:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-21 22:10:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 22:10:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-12-21 22:10:28,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 43 [2020-12-21 22:10:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:28,678 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-12-21 22:10:28,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:10:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-12-21 22:10:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 22:10:28,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:28,680 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:28,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:28,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash -699697486, now seen corresponding path program 3 times [2020-12-21 22:10:28,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:28,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714544661] [2020-12-21 22:10:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 22:10:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714544661] [2020-12-21 22:10:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366917134] [2020-12-21 22:10:29,026 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:10:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:10:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-12-21 22:10:29,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:10:29,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-21 22:10:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851364968] [2020-12-21 22:10:29,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:10:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:29,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:10:29,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:10:29,274 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 14 states. [2020-12-21 22:10:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:29,678 INFO L93 Difference]: Finished difference Result 172 states and 215 transitions. [2020-12-21 22:10:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:10:29,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-12-21 22:10:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:29,682 INFO L225 Difference]: With dead ends: 172 [2020-12-21 22:10:29,683 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 22:10:29,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:10:29,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 22:10:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2020-12-21 22:10:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 22:10:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2020-12-21 22:10:29,714 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 67 [2020-12-21 22:10:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:29,717 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2020-12-21 22:10:29,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:10:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2020-12-21 22:10:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 22:10:29,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:29,721 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:29,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:29,924 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1940003756, now seen corresponding path program 4 times [2020-12-21 22:10:29,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:29,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841375862] [2020-12-21 22:10:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-12-21 22:10:30,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841375862] [2020-12-21 22:10:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087291399] [2020-12-21 22:10:30,176 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:30,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:10:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:10:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:10:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:10:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-12-21 22:10:30,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:10:30,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2020-12-21 22:10:30,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895688841] [2020-12-21 22:10:30,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:10:30,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:10:30,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:10:30,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:10:30,400 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 4 states. [2020-12-21 22:10:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:10:30,452 INFO L93 Difference]: Finished difference Result 228 states and 279 transitions. [2020-12-21 22:10:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:10:30,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2020-12-21 22:10:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:10:30,454 INFO L225 Difference]: With dead ends: 228 [2020-12-21 22:10:30,454 INFO L226 Difference]: Without dead ends: 166 [2020-12-21 22:10:30,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:10:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-21 22:10:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2020-12-21 22:10:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-21 22:10:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2020-12-21 22:10:30,471 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 99 [2020-12-21 22:10:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:10:30,474 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2020-12-21 22:10:30,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:10:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2020-12-21 22:10:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 22:10:30,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:10:30,480 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:10:30,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:10:30,681 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:10:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:10:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 582451242, now seen corresponding path program 5 times [2020-12-21 22:10:30,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:10:30,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995375121] [2020-12-21 22:10:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:10:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:10:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-12-21 22:10:30,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995375121] [2020-12-21 22:10:30,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070596633] [2020-12-21 22:10:30,946 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 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